Comparison of Different Nonlinear Static Analysis Used for Seismic Assessment of Existing Buildings

Abstract eng:
The present study is focused on the comparison of non-linear static analysis (Pushover) which is used by two major guidance documents, the New Zealand guideline and the US FEMA 440, on the assessment of existing buildings currently available for moment resisting concrete frames. The main purpose of the study is to trace the differences in the results produced by these two guidelines. For this, three different moment resisting concrete frames are assessed under these two guidelines to determine the PGA value that causes their collapse. In the next step, these are compared by their similar values that are determined from the nonlinear dynamic analysis in which Park and Ang damage index is used as acceptance criteria for components. As is found, the result of force based approach which is proposed by New Zealand guideline is more compatible with the nonlinear dynamic analysis.

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