Seismic retrofit
Seismic retrofitting is the modification of buildings that already exist to make them resistant to earthquakes.[1] Seismic retrofitting techniques can be applied to other kinds of natural disasters such as tornadoes and strong winds from thunderstorms.
Seismic retrofit performance objectives
Main levels of retrofitted building structure performance [2] objectives may vary, namely:
- To protect human lives.
- To protect a structure from total failure.
- To preserve a structure's functionality after a strong earthquake.
- To make a structure, practically, unaffected by any earthquake.
Seismic Retrofit Media
- ExteiorShearTruss.jpg
Infill shear trusses – University of California dormitory, Berkeley
- 団地 support structure.jpg
Reinforced by truss at 1st floor Condominium in Tokyo
- ExtReenfDetail.jpg
External bracing of an existing reinforced concrete parking garage (Berkeley)
- PABT South Wing seismic retrofit 01.JPG
Port Authority Bus Terminal in New York City
One of many "earthquake bolts" found throughout period houses in the city of Charleston subsequent to the Charleston earthquake of 1886. They could be tightened and loosened to support the house without having to otherwise demolish the house due to instability. The bolts were directly loosely connected to the supporting frame of the house.
- ExteiorShearTruss.jpg
Infill shear trusses – University of California dormitory, Berkeley, California
- ExteriorShearTrussTwo.jpg
Massive exterior structure – Parking garage over ground level shops, Berkeley, California
- ExtReenfDetail.jpg
Pleasing use of detail – note "waist" effect and integrated bench in base. Pedestrians exiting shops are protected from collision with bench by railings behind original footing
- ExteiorShearTruss.jpg
Exterior steel infill shear truss seismic retrofit of reinforced concrete dormitory, University of California, Berkeley.
- ExteriorShearTrussTwo.jpg
Exterior general reenforcement of an existing garage structure with street level shops. Located in Berkeley near the Hayward Fault. Image by User:Leonard G. for the seismic retrofit
References
- ↑ "Earthquake-Resistant Construction". Archived from the original on 2012-09-15. Retrieved 2010-03-26.
- ↑ Earthquake Performance Evaluation Tool Online (EPETO)[dead link]
