ENG 333 Communication for Science and Research

5 years
What deformation and loads can columns sustain
How can we strengthen columns efficiently
If global stiffening elements are used, how can elements be added to columns to achieve the effect
Structural frames prior to 1970 are inadequate
Columns on structure are bad
Structures
- Pre-seismic code building with no lateral force resisting system
- Pre-seismic code building with effective lateral force resisting system
- Moment frame buildings designed for lateral forces with weak columns
- Shear wall buildings with inadequate strength
Loma Prieta earthquake illustrates problem especially in elevated structures
- Examples: Cypress Viaduct, Central Freeway, Southern Freeway
- Hospital in Palo Alto
- Hotel in downtown Santa Cruz
Column failures due to lateral and vertical load
Structures typical of this problem prevalent in state
- High occupancy in these structures
To strengthen existing columns now
- Concrete infills or external buttresses
- Heavy and difficult installation
- Steel bracings
Need to understand effectiveness of steel bracing elements for retrofitting existing structures
Need to understand behavior or retrofit on shaking structures
Project experimental
Review literature and experience on similar problems
Test isolated columns
Static test of structures
Dynamic test of structures
Use researchers from university and professional practice together since research is applied