USA
Projects
North
Carolina State University (Since August 2000):
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Title: |
International Workshop on the Use of Fiber Reinforced Polymers (FRPs) for sustainable structures |
Granting Agency: |
National Science Foundation |
Funding Amount: |
$25,000 |
Dates: |
May 2008 |
PI: |
Sami Rizkalla
|
Status: |
Awarded. |
Abstract: |
To organize an International workshop in Egypt to facilitate technology transfer, to disseminate research findings and to identify the methodology that should be undertaken to initiate research collaboration between USA researchers and the Egyptian counterpart on the use of FRP, for strengthening and repair of Civil Engineering infrastructures leading to sustainable structures. |
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Title: |
Performance of High Strength CFRP for Strengthening Concrete Structures |
Granting Agency: |
NSF - I/UCRC - RB2C - Structural Preservative System |
Funding Amount: |
$50,000 |
Dates: |
1 year |
PI: |
Sami Rizkalla
|
Status: |
In progress. |
Abstract: |
The study is focused on the behavior of high strength CFRP material for strengthening concrete structures. The specific parameters to be considered are flexural strengthening of beams, shear strengthening of beams and flexural strengthening of concrete slabs. |
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| Title: |
Torsional Strengthening of Concrete Structures Using Near Surface Mounted Fibre Reinforced Polymers
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| Granting Agency: |
Australian Research Council |
| Funding Amount: |
$1,540,818 |
| Dates: |
3 years |
| PI: |
R. Al-Mahaidi ( Monash University )
Co-PI: S. Rizkalla |
| Status: |
Awarded July 2007 |
| Abstract: |
The proposed study focuses on the torsional strengthening of concrete flexural members in bridges and buildings using Fibre Reinforced Polymers (FRP). Since the mid 1980s, a significant number of studies on flexural and shear strengthening of beams and axial strengthening of columns have been performed. The area of torsional strengthening has received little attention and thus no reliable data exists to enable the incorporation of the topic in design guidelines. The proposed study will fill the gap that currently exists in the FRP strengthening of RC structures. It will also provide the engineering community with analytical tools for the design of FRPs in torsional strengthening applications.
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| Title: |
Developing a Telematics Platform for Bridge Monitoring and Health Prognositcs
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| Granting Agency: |
National Science Foundation (Supplement to RB2C Center) |
| Funding Amount: |
$100,000 |
| Dates: |
July 2007 – June 2009 |
| PI: |
S. Rizkalla |
| Status: |
Awarded |
| Abstract: |
The approach proposed in this TIE project integrates the extensive research on physics of bridge damages and instrumentation of bridge monitoring system, conducted at the RB2C Center, with the feature-based smart prognostic agent, namely the Watchdog Agent® developed by the IMS Center , to accurately quantify and predict bridge deterioration. The major merit of this work will be the initiation of a combined physics-statistics-based prognostics approach, which expands and integrates the theories and tools developed in RB2C and IMS. The developed methodology will bring about innovation to predict bridge deterioration and provide a general framework for prognostic bridge health management for next-generation intelligent transportation maintenance systems.
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| Title: |
Basalt Fiber Reinforced Cementitious Matrix Composites for Infrastructure Repair
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| Granting Agency: |
National Science Foundation (Supplement to RB2C Center) |
| Funding Amount: |
$50,000 |
| Dates: |
July 2007 – June 2009 |
| PI: |
S. Rizkalla
|
| Status: |
Awarded |
| Abstract: |
The project focuses on the strengthening and upgrade of existing reinforced concrete (RC) structures using a new class of composites made of basalt fibers embedded in a cement-based matrix (BFRC). Basalt fibers are manufactured in a single-stage process by melting naturally occurring basalt rock. The BFRC confining system represents a promising solution to overcome limitations of current fiber-reinforced-polymer (FRP) systems that make use of carbon or glass fibers impregnated with an epoxy resin. The research will first study the mechanical and durability performance of commercial grade basalt fibers and then of the system obtained by combining them with the cementitious matrix. |
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| Title: |
Strengthening In-fill Brick Walls with Composite |
| Granting Agency: |
E. Fyfe Company |
| Funding Amount: |
$89,000 |
| Dates: |
2008-2009 |
| PI: |
S. Rizkalla |
| Status: |
Awarded |
| Abstract: |
The research is designed to examine the effectiveness of various strengthening techniques for In-fill brick walls using glass fiber reinforced polymer material. The experimental progress consists of fourteen full scale In-fill brick wall unites subjected to uniform pressure to simulate the pressure and extreme wind loading conditions. Various constraints and anchorage systems were included. |
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| Title: |
Structural Behavior of Grancrete Material |
| Granting Agency: |
Grancrete |
| Funding Amount: |
$75,000 |
| Dates: |
January 2007– June 2008 |
| PI: |
S. Rizkalla |
| Status: |
Awarded |
| Abstract: |
The proposed research program is designed to examine a new type of concrete as material for construction of buildings, bridges and special infrastructural applications. The initial phase of the evaluation includes tests to determine the basic material characteristics of Grancrete including compressive strength, elastic modulus, tensile strength, creep, shrinkage, and toughness of materials. The second phase will include examining the behavior of Grancrete mixed with small aggregate to enhance the overall behavior as construction materials. Based on the findings, the research will be extended to include the behavior of Grancrete reinforced with steel reinforcements and fiber reinforced polymer materials. The research plan will be examined every six months with the industrial members to finalize the research needed to optimize the use of these materials as construction material. |
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| Title: |
Behavior of Concrete Sandwich Panels Reinforced with CFRP Grid |
| Granting Agency: |
AltusGroup |
| Funding Amount: |
$47,000 |
| Dates: |
August 2006– July 2007 |
| PI: |
S. Rizkalla Co-PI: P. Zia |
| Status: |
Awarded |
| Abstract: |
The objective of the study is to determine the behavior of prestressed concrete sandwich panels under the effect of gravity and simulated wind loading conditions. The panels are reinforced transversely by a new innovative carbon fiber reinforced polymer to achieve composite action under the combined gravity and wind load. The research consists of an experimental program which included testing of six full-scale sandwich panels varying from 20 to 40 feet. All panels will be tested under fatigue and monotonic loading conditions to failure. |
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| Title: |
Characteristics of Glass Fiber Reinforced Polymer Material |
| Granting Agency: |
Martin Marietta Composites |
| Funding Amount: |
$45,400 |
| Dates: |
August 2006– July 2007 |
| PI: |
S. Rizkalla |
| Status: |
Awarded |
| Abstract: |
The main objective of the project is to evaluate the structural performance of 3-D FRP sandwich panels. The panels consist of GFRP laminates and foam core where the top and bottom skin GFRP layers are connected together with through thickness fibers. The experimental program focuses on the overall flexural behavior under various loading conditions. The variables are number of GFRP piles, core configurations, density of the through-thickness fibers and the direction of the embedded through-thickness fibers. |
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| Title: |
Development of Rational Design Methodology for Precast, Prestressed Concrete Spandrel Beams |
| Granting Agency: |
Precast/Prestressed Concrete Institute |
| Funding Amount: |
$170,000 |
| Dates: |
July 2006– June 2009 |
| PI: |
S. Rizkalla Co-PI: P. Zia |
| Status: |
Awarded |
| Abstract: |
The goal of the proposed research is to develop appropriate design procedures and to simplify the detailing requirements for precast, L- shaped spandrel beams. The research includes an extensive experimental program designed to test prototype precast L-shaped spandrel beams and an analytical phase based on non-linear finite element techniques.
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| Title: |
Evaluation of a New High Corrosive Resistant Steel Reinforcement for Concrete Structures in the
Mediterranean Salt Environments |
| Granting Agency: |
National Science Foundation |
| Funding Amount: |
$36,290 |
| Dates: |
September 2005 – December 2007 |
| PI: |
T. Hassan Co-PI: S. Rizkalla |
| Status: |
Awarded |
| Abstract: |
MMFX is a high strength, highly corrosion resistant steel, ideal for use in civil engineering applications for salt environments such as the Mediterranean environment in Egypt and high humidity climate such as in North Carolina and many other ocean exposed states. The research will introduce the MMFX steel as a new material has a high corrosion resistance to the engineering community in Egypt for the first time. The proposed research project consists of three major tasks; (i) experimental work, (ii) analytical phase, (iii) development of design guidelines. |
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| Title: |
Value Engineering and Cost-Effectiveness of Various FRP Repair Systems – Part II |
| Granting Agency: |
North Carolina Department of Transportation |
| Funding Amount: |
$83,663 |
| Dates: |
July 2005 - December 2006 |
| PI: |
S. Rizkalla |
| Status: |
Awarded |
| Abstract: |
This research program is an extension of NCDOT Project 2004-15: Value Engineering and Cost-Effectiveness of Various FRP Repair Systems, which will be completed in June 2005. Results of Project 2004-15 and the proposed extension will be used to produce complete design guidelines. The project will provide bridge maintenance engineers with a comprehensive document to select the most appropriate repair or strengthening systems along with the cost effectiveness and value engineering for each system. |
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| Title: |
Shear Behavior of MMFX Stirrups |
| Granting Agency: |
MMFX Technologies Corporation |
| Funding Amount: |
$50,000 |
| Dates: |
July 2006– June 2007 |
| PI: |
S. Rizkalla |
| Status: |
Awarded |
| Abstract: |
The objective of this test program is to determine the feasibility of using MMFX reinforcing bars as shear reinforcement for reinforced concrete structures. To achieve this objective, comparative tests will be conducted for shear critical reinforced concrete beams using both conventional steel and MMFX steel reinforcements. The experimental program consists of nine reinforced concrete beams of each series are further divided into 3 groups of 3 beams each. Within each group, the variable would be the amount of shear reinforcement – the minimum, the intermediate, and the maximum amounts. |
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| Title: |
Evaluation of Bond Characteristics of MMFX Steel |
| Granting Agency: |
MMFX Technologies Corporation |
| Funding Amount: |
$183,333 |
| Dates: |
July 2005 – June 2009 |
| PI: |
S. Rizkalla |
| Status: |
Awarded |
| Abstract: |
The research proposal investigates the use of a new reinforcement steel, commercially known as MMFX Steel, for the construction of large footing and Mat Foundations. The first phase of the funding will investigate the “one-way mechanism” of the reinforced concrete flexural members reinforced with this high yield strength steel and their effects on the shear strength and failure modes. The study includes testing of large scale beams with shear span to depth ratio of three to examine the mode of failure for Mat Foundation. The behavior will be compared to a beam reinforced with conventional grade 60 steel. |
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| Title: |
Use of MMFX for MAT Foundation Phase I: One-Way Shear Mechanism |
| Granting Agency: |
MMFX Technologies Corporation |
| Funding Amount: |
$25,000 |
| Dates: |
March 2005 – June 2005 |
| PI: |
S. Rizkalla Co-PI:
M. Kowalsky |
| Status: |
Awarded |
| Abstract: |
The research proposal investigates the use of a new reinforcement steel, commercially known as MMFX Steel, for the construction of large footing and Mat Foundations. The first phase of the funding will investigate the “one-way mechanism” of the reinforced concrete flexural members reinforced with this high yield strength steel and their effects on the shear strength and failure modes. The study includes testing of large scale beams with shear span to depth ratio of three to examine the mode of failure for Mat Foundation. The behavior will be compared to a beam reinforced with conventional grade 60 steel. |
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| Title: |
Bond Behavior of SAS High Performance Steel |
| Granting Agency: |
SAS Stressteel, Inc. |
| Funding Amount: |
$70,110 |
| Dates: |
April 2004 – July 2007 |
| PI: |
S. Rizkalla |
| Status: |
Awarded |
| Abstract: |
To evaluate the bond characteristics of the SAS high tensile strength steel using end-block and splice beam test specimens according to the ICC specifications. |
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| Title: |
Torsion Behavior of Precast Prestressed Ledger Beams |
| Granting Agency: |
Metromont Corporation |
| Funding Amount: |
$65,000 |
| Dates: |
September 2005 – December 2005 |
| PI: |
S. Rizkalla Co-PI: P. Zia |
| Status: |
Awarded |
| Abstract: |
To evaluate the behavior of precast prestressed ledger beams under the effect of eccentric loading of precast beams typically used for parking structures. Two full size beams with spans of 30 and 45 feet will be tested using double T-beams to load the beams up to failure. Four different reinforcement details are considered in this integration. |
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| Title: |
Debonding Failure in CFRP Strengthened Steel Structures |
| Granting Agency: |
Australian Research Council |
| Funding Amount: |
$ 325,000 (Australian) |
| Dates: |
January 2005 – December 2007 |
| PI: |
X. Zhao (Monash University)
Co-PIs: S. Rizkalla & R. Al-Mahaidi (Monash University) |
| Status: |
Awarded |
| Abstract: |
The research will make a breakthrough in understanding the bond characteristics between CFRP and steel. It will enhance the capacity of Australian researchers to participate in a new cutting-edge research area, and help create a vibrant new industry for strengthening steel structures. The project will contribute to improved cost efficiency and safety of steel structures thereby contributing to the socio-economic well being of Australia and the USA including road, offshore, building and mining industries.
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| Title: |
RC Beams Strengthened with Near Surface Mounted FRP |
| Granting Agency: |
Hong Kong National Research Council |
| Funding Amount: |
HK $633,695 |
| Dates: |
January 2005 – December 2007 |
| PI: |
Jin-Guang Teng Co-PIs: S. Rizkalla & B. Taljsten (Sweden) |
| Status: |
Awarded |
| Abstract: |
The project investigates the use of fiber reinforced polymer (FRP) material to strengthen reinforced concrete (RC) beams to increase their flexural and shear capacity. The project at Hong Kong will focus on installing these materials into the tension zones of the flexural members using the near surface mounted technique. The project complements the research in progress at North Carolina State University sponsored by the North Carolina Department of Transportation using 43-year old prestressed c-channels and AASHTO girders. The research findings will be greatly enhanced by the collaboration with the University of Technology, Sweden. |
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| Title: |
Evaluation of MMFX Steel for NCDOT Concrete Bridges |
| Granting Agency: |
North Carolina Department of Transportation |
| Funding Amount: |
$115,000 |
| Dates: |
July 2004 - December 2005 |
| PI: |
S. Rizkalla Co-PI: P. Zia |
| Status: |
Awarded |
| Abstract: |
This research project investigates the effectiveness of highly corrosive, resistant, high strength steel reinforcements, recently patented as MMFX Steel, for use in highway concrete bridge applications. The experimental program consists of multi-phases to examine the mechanical properties, effect of bend and corrosion resistance claimed by the manufacturer. The structural performance includes full-scale concrete bridge decks. The analysis will be based on non-linear-finite elements to determine the influence of other parameters, which could affect the design. The research will provide design guidelines for the use of this new tool. |
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| Title: |
GFRP Structural Material Testing for Wraps used for Highway Bridge |
| Granting Agency: |
North Carolina Department of Transportation |
| Funding Amount: |
$7,000 |
| Dates: |
January 2004 - April 2004 |
| PI: |
S. Rizkalla |
| Status: |
Awarded |
| Abstract: |
The work involved evaluation of the glass fiber reinforced polymer (GFRP) materials used for wraps of bridge piers on westbound US-64 over the Haw River in Chatham County, North Carolina. Tests were performed using five structural material samples (witness panels) produced during the construction. |
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| Title:
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Innovative
Textile Technology for Modular Bridge Decks |
| Granting
Agency: |
National
Science Foundation |
| Funding
Amount: |
$186,290 |
| Dates:
|
July
2003 - December 2005 |
| PI: |
S.
Rizkalla |
| Status: |
Awarded |
| Abstract:
|
This research program is designed to, for the first time ever, adapt the 3-D weaving process to develop innovative FRP bridge decks. The work plan has both experimental and analytical components. The experimental work consists of testing scale models of FRP decks as well as coupon testing under static and fatigue loading. The analytical work includes finite element modeling of the FRP decks using micro- and macro-models. Once the models are calibrated using the experimental results of Part I, a parametric study will be carried out to optimize the shape and configuration of the deck. |
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| Title:
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Value
Engineering and Cost Effectiveness of Various FRP Repair Systems |
| Granting
Agency: |
North
Carolina Department of Transportation |
| Funding
Amount: |
$154,243 |
| Dates:
|
July
2003 - June 2005 |
| PI: |
S.
Rizkalla |
| Status: |
Awarded |
| Abstract:
|
This research program is designed to investigate the feasibility of using the most efficient externally bonded FRP repair/strengthening system to rehabilitate prestressed concrete bridge girders damaged due to accident or collision impact causing loss of prestressing and/or spalling of concrete. The research will investigate the efficiency and cost-effectiveness of externally bonded FRP sheet and strip repair/strengthening systems using prestressed channel beams supplied by NCDOT from existing bridges. It will also investigate the use of Near-Surface-Mounted FRP bars and strips to strengthen the same prestressed channel beams along with examining the flexural behavior under the effect of static and fatigue loadings. |
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| Title:
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Developing
a Simplified Method for Predicting Deflection in Steel Plate
Girder Under Non-Composite Dead Load for Stage-Constructed Bridges
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| Granting
Agency: |
North
Carolina Department of Transportation |
| Funding
Amount: |
$149,000 |
| Dates:
|
July
2003 - December 2005 |
| PI: |
E.
Sumner Co-PI:
S. Rizkalla |
| Status: |
Awarded |
| Abstract:
|
This research program is designed to develop an empirically based method to predict the non-composite deflection of steel plate girders in staged-constructed bridges. The effects of bridge skew, girder length, girder spacing, cross-frame stiffness, in-place deck slab thickness, and composite action on a portion of the girder length will be included in the method. The empirically based method will utilize a series of simple modifiers to adjust the traditionally predicted single girder line deflection to the expected staged-construction deflection. The formulation of the simplified method will require a combination of field measured data and extensive three-dimensional analytical simulation. |
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| Title:
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Under
Construction Bridge Deflection Measurements of Eno River |
| Granting
Agency: |
North Carolina Department of Transportation |
| Funding
Amount: |
$7,000 |
| Dates:
|
February
2003 - April 2003 |
| PI: |
S.
Rizkalla Co-PI:
E. Sumner |
| Status: |
Awarded |
| Abstract:
|
NCDOT
Structure Design Unit is currently investigating alternate means
to accurately predict girder deflection due to the casting of the
concrete decks. The accurate prediction of this deflection becomes
increasingly important as the high performance steel and the associated
long span structures increases. In addition, the prediction of deflection
for adjacent girders of two different stages of construction is
important to ensure that the adjacent cast results in an even deck
and that the ultimate deck thickness matches that used in the design
of the girders.
The primary objective of the project is to provide NCDOT a field
measurement of the steel girders of the Eno River Bridge in Durham,
NC. The measurement will be compared to the predicted deflections. |
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| Title: |
I/UCRC Center, "Repair of Buildings and Bridges with Composites (RB2C)" - Continuation Grant |
| Granting Agency: |
National Science Foundation |
| Funding Amount: |
$90,000 |
| Dates: |
September 2007 - August 2010 |
| PI: |
S. Rizkalla |
| Status: |
Awarded |
| Abstract: |
The NSF Industry/University Cooperative Research Center entitled "Repair of Buildings and Bridges with Composites" (RB2C), is located at the Constructed Facilities Laboratory, North Carolina State University (NCSU). The Center is working in collaboration with the Center located at the University of Missouri-Rolla (UMR). The Center at NCSU focuses on the needs of the construction industry in development of new and innovative structural components as well as strengthening/repair methods for existing structures using advanced composite materials. |
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| Title:
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I/UCRC Center, "Repair of Buildings and Bridges with Composites
(RB2C)" |
| Granting
Agency: |
National Science Foundation |
| Funding
Amount: |
$250,000 |
| Dates:
|
July 2002 - June 2008 |
| PI: |
S. Rizkalla |
| Status: |
Awarded |
| Abstract:
|
The NSF Industry/University Cooperative Research Center entitled
"Repair of Buildings and Bridges with Composites" (RB2C),
is located at the Constructed Facilities Laboratory, North Carolina
State University (NCSU). The Center is working in collaboration with the Center
located at the University of Missouri-Rolla (UMR). The Center at
NCSU focuses on the needs of the construction industry in development
of new and innovative structural components as well as strengthening/repair
methods for existing structures using advanced composite materials. |
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| Title: |
Development of Repair Systems for Steel Structures and Bridges |
| Granting Agency: |
Mistubishi Chemical FP America |
| Funding Amount: |
$300,000 |
| Dates: |
July 2002 - June 2008 |
| PI: |
S. Rizkalla |
| Status: |
Awarded |
| Abstract: |
The project investigates the use of high modulus carbon fiber polymer (CFRP) material for strengthening steel structures and bridges. The material in use now is in the form of sheets and strips bonded to the tension surface of steel structures. The first phase includes selection of the appropriate resin and bond characteristics of the material. The second phase is to test large-scale steel monopoles strengthening with different materials, configurations and subjected to static and fatigue loading conditions. The study will be continued to include the environmental effect on the strengthening system. |
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| Title: |
Evaluation of New Generation of Adhesives for Marine Structures |
| Granting Agency: |
IPS Corporation |
| Funding Amount: |
$250,000 |
| Dates: |
July 2002 - June 2006 |
| PI: |
S. Rizkalla |
| Status: |
Awarded |
| Abstract: |
The project investigates the behavior and material characteristics of twoproposed adhesives designed for marine structures. The project is mainly an experimental study at this stage. The experimental program initially consists of lap shear test to determine the bond characteristics of two adhesives between two surfaces; each consists of Carbon Fiber Reinforced Polymer (CFRP) and steel surface. A specially designed insulated room has been constructed at the Constructed Facilities Laboratory to house the instrumentations, which were built to subject the specimens to the specified environment. |
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| Title: |
An Innovative Bridge Deck System |
| Granting Agency: |
Martin Marietta Composites |
| Funding Amount: |
$300,000 |
| Dates: |
July 2002 - June 2008 |
| PI: |
S. Rizkalla |
| Status: |
Awarded |
| Abstract: |
The research includes development of an innovative system for highway bridge decks. The system is also suitable for manufacturing trailer walls using small thicknesses. The innovative concept consists of two layers of 2-D fiber pultruded sheets and styrofoam layers in between to provide the required thickness. At a later stage, bundled fibers are inserted in the third direction to increase the strength through-thickness properties of the panels. The system is a modified process for the Z-technology used for the aerospace industry. The test program consists of different tests to examine the material characteristics as well as the behavior of the panel. |
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| Title: |
Selection of Structural Adhesives for Strengthening Steel Structures |
| Granting Agency: |
Reichold |
| Funding Amount: |
$50,000 |
| Dates: |
July 2002 - June 2003 |
| PI: |
S. Rizkalla |
| Status: |
Awarded |
| Abstract: |
The research focused on the selection of the most appropriate adhesive for the use of high modulus carbon fiber polymer material to steel surfaces. The also research examined the various techniques which can be used to speed the erection and curing of these adhesives under severe environmental conditions. |
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| Title:
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Supplement
Funding to Support Undergraduate Student |
| Granting
Agency: |
National
Science Foundation |
| Funding
Amount: |
$11,625 |
| Dates:
|
July
2003 - June 2006 |
| PI: |
S.
Rizkalla |
| Status: |
Awarded |
| Abstract:
|
Efforts at repair of steel bridges with FRP have not been very successful because of low modulus of most FRP materials as compared to steel. The new carbon fibers have high modulus of elasticity that is about 3 times that of steel in fiber form and twice that of steel in laminate form. The student will be involved in an experimental plan consisting of testing the fibers with a variety of resins to identify the most effective and compatible resin for the repair of steel. Tests will include laminates as well as bond with steel plates. |
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| Title:
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Application
of the LRFD Bridge Design Specifications to High-Strength
Structural Concrete Flexure and Compression Provisions |
| Granting
Agency: |
Cooperative
Research Programs, Transportation Research Board
(NCHRP) |
| Funding
Amount: |
$600,000 |
| Dates:
|
May
2003 - February 2007 |
| PI:
|
S. Rizkalla Co-PI: A. Mirimran Co-PI:
P.Zia |
| Status: |
Awarded |
| Abstract:
|
The objective of this research is to develop recommended revisions
to the AASHTO LRFD Bridge Design Specifications to extend the applicability
of the flexural and compression design provisions to concrete up
to 18 ksi. The research results will allow full utilization of the
material characteristics and greater use of high-strength concrete,
since the current LRFD limits the design strength of the ultimate
compressive strength of concrete to 69 MPa (10 ksi). The results
will have great economical advantages by allowing bridge design
engineers to design AASHTO girders more effectively in terms of
the thickness of the web and larger beam spacing. |
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| Title:
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Wireless
Sensor Networks for Structural Health Monitoring of Bridges |
| Granting
Agency: |
National
Science Foundation |
| Funding
Amount: |
$50,000 |
| Dates:
|
July
2003 - December 2005 |
| PI: |
S.
Rizkalla |
| Status: |
Awarded |
| Abstract:
|
The
research project deals with structural health monitoring of bridges
and civil engineering buildings. The first part addresses sensing/data
interpretation, the second part addresses the transfer of data from
sensors to the location interpretation occurs. The proposal ties
together the expertise of the two NSF-I/UCRC Centers at NC State,
RB2C in the Department of Civil Engineering and CACC in the Electrical
and Computer Engineering Department. The specific issue is the wireless
communication of data for structural health monitoring of civil
engineering structures. |
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| Title:
|
Corrosion
Inhibitors for Concrete Bridges |
| Granting
Agency: |
NC
Department of Transportation |
| Funding
Amount: |
$170,681 |
| Dates:
|
July
2002 - December 2004 |
| PI: |
A.
Mirmiran Co-PI:
S. Rizkalla |
| Status: |
Awarded |
| Abstract:
|
The research project evaluates the effectiveness of commercially
available corrosion inhibitors for remediation purposes in delaying,
slowing, stopping or reversing the corrosion process in existing
concrete under laboratory conditions of wet-dry cycles and salt
water spray, simulating severe field conditions. The results will
be used to compare the effectiveness of corrosion inhibitors at
different levels of chloride contamination and establish the threshold
beyond which surface application does not provide any significant
improvement. The project will develop guidelines and specifications
for surface treatment using corrosion inhibitors and recommend means
to incorporate surface treatment scheduling in bridge inspection
and maintenance plans for NCDOT. |
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| Title:
|
Macromolecular
Science and Infrastructure Engineering
Joint with Virginia Tech |
| Granting
Agency: |
National
Science Foundation |
| Funding
Amount: |
$89,215/year
(part of IGERT to Virginia Tech) |
| Dates:
|
September
2001 - August 2005 |
|
Co-PI
with Virginia Tech |
| Status: |
Awarded |
| Abstract:
|
The Integrated Graduate Education Research and Traineeship (IGERT) Program provides the opportunity for our graduate students to conduct an interdisciplinary research in Macromolecular Science and Infrastructure Engineering, focused on polymeric adhesives and composites in civil engineering structures. The program allows collaboration between the following seven departments: Chemistry, Engineering Science, Civil Engineering, Electrical Engineering, Computer Engineering, Wood Science and Marketing from four colleges, including NC State University. It will include exchange of students and faculty members, as well as development of new courses in the field of infrastructures. |
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|
|
|
| Title:
|
Structural
Behavior of Precast Concrete Wall Panels |
| Granting
Agency: |
Superior
Walls of America, Ltd. |
| Funding
Amount: |
$20,251 |
| Dates:
|
August
2001 - April 2002 |
| PI: |
R. Nunez Co-PI:
S. Rizkalla |
| Status: |
Awarded |
| Abstract:
|
The
experimental program, conducted at the Constructed Facilities Laboratory
(CFL) was designed to examine the structural behavior of precast
concrete wall panels produced by Superior Walls of America. The
panels were examined under the effect of axial compression loading
conditions and racking shear load forces simulating wind loads on
the structures. Behavior during and equivalent loading conditions,
as well as the mode of failure, were examined and reported. Based
on the test results, the company modified some of the structural
design and connection details of the wall system. |
[ Top ]
|
|
|
| Title:
|
Performance
of Sandwich Panels Under Axial, Flexural and Shear Loads |
| Granting
Agency: |
Bally
Refrigerated Box, Inc. |
| Funding
Amount: |
$56,925 |
| Dates:
|
2002 |
| PI: |
S.
Rizkalla Co-PI:
R. Nunez |
| Status: |
Awarded |
| Abstract:
|
The
objective of this investigation is to evaluate the structural performance
of Bally's sandwich panels in accordance with ICBO AC04 "Acceptance
Criteria for Sandwich Panels." The panels are examined under
the effect of axial compression load, transverse load and racking
shear loads. End condition and panel sizes are randomly selected
for typical products line. |
|
|
|
| Title:
|
Mechanical
Properties of MMFX Steel Rebars |
| Granting
Agency: |
MMFX
Steel Corporation of America |
| Funding
Amount: |
$21,000 |
| Dates:
|
2002 |
| PI: |
S.
Rizkalla |
| Status: |
Awarded |
| Abstract:
|
The
project provides the fundamental mechanical material properties
of the new high performance steel reinforcing bars commercially
known as MMFX. The investigation included the tensile strength,
shear strength, bend effect, bond strength and behavior of the bars
in concrete compression members. The work extended to examine the
flexural behavior including deflection, cracking and mode failure.
Large scale specimens are currently used to examine the development
length for different sizes of MMFX bars. |
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|
|
|
| Title:
|
Shear
Strength of FRP Anchors |
| Granting
Agency: |
Fyfe
Co., LLC |
| Funding
Amount: |
$3,170 |
| Dates:
|
2002 |
| Status: |
Awarded |
| Abstract:
|
The
project evaluates the strength and mode of failure of typical joints
for aluminum trusses used for highway sign structures and strengthened
by carbon fiber-reinforced polymer materials (CFRP). Typical joints
have been subjected to membrane tension forces to examine the behavior.
The CFRP is wrapped to correct the diagonal member with the bottom
chrod members. This phase includes static loading conditions only.
|
|
|
|
| Title:
|
Concept
Paper for Establishment of Industry/University Cooperative Research
Center, Repair of Buildings and Bridges with Composites (RB2C) |
| Granting
Agency: |
National
Science Foundation |
| Funding
Amount: |
$10,000/year |
| Dates:
|
April
2001 - July 2002 |
| PI: |
S.
Rizkalla |
| Status: |
Awarded |
| Abstract:
|
The
"Repair of Bridges and Buildings Center" (RB2C) is an
industry/university/ government cooperative research center sponsored
jointly by North Carolina State University, the University of Missouri
- Rolla, the National Science Foundation, and participating industrial
corporations and government agencies.
Faculty
members from the Department of Civil Engineering are involved
in unique research programs with industrial relevance. Center
programs provide research assistants (MS and PhD candidates) with
pertinent research topics, the means for carrying out their research,
and valuable career-oriented experiences.
Current
research in RB2C is focused in what areas?
—
Strengthening Concrete Structures and Bridges with Composites.
—
Innovative composite structural system for Bridge decks.
—
Performance of different Adhesives for Composite Structures.
—
Strengthening Steel Towers and Bridges with Composite. |
[
Top ]
|
|
|
| Title:
|
Performance
of Laminated and Unlaminated Glass Under Impact Load |
| Granting
Agency: |
Clear
Defense Sports & Athletics |
| Funding
Amount: |
$11,140 |
| Dates:
|
2001 |
| PI:
|
S.Rizkalla Co-PI:
R. Nunez |
| Status: |
Awarded |
| Abstract:
|
The
project examined the behavior of 1/2 and 5/8" polymer laminated
glass used in hockey arenas as security glazing against the impact
of a flying puck or high-speed hockey player, instead of the traditional
glass currently used. Typical panel sizes have been tested under
static and impact load using drop weight approach. The contact surface
was a typical puck and loaded with the appropriate weight and speed
through selected heights. |
|
|
| Title:
|
Performance
of GFRP Deck |
| Granting
Agency: |
Martin
Marietta Materials |
| Funding
Amount: |
$11,132 |
| Dates:
|
2001 |
| PI: |
S.Rizkalla |
| Status: |
Awarded |
| Abstract:
|
This
project examined the structural behavior of new glass fiber reinforced
polymer, GFRP, for highway bridge decks produced by Martin Marietta
to overcome the serious durability issues of reinforced concrete
decks, commonly used. This project provides structural testing of
the new deck using AASHTO specifications to simulate truck loads. |
|
|
|
| Title:
|
Repair
of Aluminum Joint with GFRP and CFRP |
| Granting
Agency: |
Fyfe
Co., LLC |
| Funding
Amount: |
$4,820 |
| Dates:
|
2001 |
| PI: |
S.Rizkalla |
| Status: |
Awarded |
| Abstract:
|
An
innovative technique is introduced to repair the joints of aluminum
trusses with GFRP and CFRP. In this project, damage of the welded
joint is simulated by grinding the weld before applying a number
of FRP layers to the joint in both the longitudinal and circumferential
directions of the members. The diagonal members are tested in tension
to evaluate the strength of the repaired join. |
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Top ]
Last Updated:
May 4, 2009
(dl)
|