Assessing the Aftershock Collapse Safety of Reinforced Concrete Frame Buildings With Infills


Abstract eng:
The aftershock collapse safety of a building can inform the decisions of owners and users regarding reoccupancy after an earthquake, thereby affecting the recovery process. This paper seeks to quantify the aftershock collapse performance of two reinforced concrete frame buildings with infills. After assessing their collapse safety in the intact state, the residual collapse capacity following mainshock damage is evaluated by conducting incremental dynamic analysis to collapse using mainshock-aftershock ground motion sequences. The studied buildings are representative of modern design and construction of residential buildings in Noida, India and vary based on the configuration of infill panels (full height and soft-story configurations). The rate of decline in collapse capacity is measured based on the median spectral acceleration at collapse for the main shock damaged building normalized by that of the intact case as a function of the mainshock intensity. The increase in the conditional probability of collapse is also used as a metric for quantifying the decline in collapse safety. The study finds that the presence of a soft and weak first story significantly increases the aftershock collapse vulnerability. Among the engineering demand parameters recorded during the mainshock analyses, the peak column hinge rotation was found to have the highest correlation with the reduction in collapse performance for the damaged soft story building. For the building with full height infill, all mainshock response parameters were found to have comparable correlation with the aftershock collapse vulnerability.

Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 2135.:
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