Avoiding Disproportionate Collapse

Full Session with Abstracts

339808-1 - Strengthening RC Frames against Disproportionate Collapse by Post-Tensioning Strands

Friday, April 20
3:30 PM - 5:00 PM
Location: 202B

Extensive studies had been carried out to understand the load resisting mechanisms and load re-distribution behavior of reinforced concrete (RC) frames to resist disproportionate collapse. It is found that RC frames with irregular layout or longer design span have high vulnerability for collapse. Thus, it is necessary to look for measures to improve the robustness of the frames against disproportionate collapse. Post-Tensioning Strand (PTS) is one of the strengthening approaches. Thus, a series of experimental and analytical studies are carried out to quantify the efficiency of externally installed PTS for upgrading the load resisting capacity of RC frames. The test results including load-displacement curves, deformation shape, and local strain are captured. In addition, the load resisting capacity of PTS in different load carrying stages is evaluated. The change of the failure modes due to externally installed PTS is also determined.

Kai Qian

Professor
Guangxi University

Dr. Qian got his MSC and Ph. D degree from Nanyang Technological University Singapore. Now he is a professor in the College of Civil Engineering and Architecture at Guangxi University, China. His research interests include reinforced concrete and prestressed concrete structures design, particularly in the area of progressive collapse and blast resistance.

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339808-1 - Strengthening RC Frames against Disproportionate Collapse by Post-Tensioning Strands



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