Analytical Fragility Assessment of a Low-Rise URM Building

Abstract eng:
Unreinforced masonry (URM) is one of the most common structural types for low-rise buildings in the United States. Its dynamic behavior is highly nonlinear and generally shows high vulnerability to seismic loading. Despite the need of its seismic risk assessment, the fragility curves of URM buildings based on analytical model is scarce in the field of earthquake engineering. This study performs seismic fragility analysis of a URM low-rise building. Fragility curves are developed for a two-story URM building designed to represent a typical essential facilities (i.e., a firehouse) in the central and southern US (CSUS) region. A structural modeling method is proposed that can be effectively used for fragility analysis without significant computational time, and which maintains an acceptable level of accuracy in representing the nonlinear behavior of the structures.

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