Probabilistic seismic performance assessment of brick masonry infill reinforced concrete building

Abstract

The present study aims at investigation of seismic performance of brick masonry infill (BMI) reinforced concrete building through probabilistic approach. An existing seven storey reinforced concrete building situated in Indian seismic zone IV, which represents the typical properties of medium-rise non-ductile residential apartment buildings in India has been considered. Nonlinear seismic behavior of building with and without BMI is studied to evaluate seismic performance. Probabilistic seismic demand model (PSDM), fragility curves and damage probability matrix has been developed. Analytical fragility curves using incremental dynamic analysis have been developed. Sixteen natural ground motion records from PEER strong motion database are used to study the ground motion variability. Incremental dynamic analysis is performed and the maximum interstory drift is obtained as a response parameter for all simulations. The PSDM parameters are calculated using regression analysis for numerical models. The variation in the PSDM parameters is studied. Discrete probability matrices are developed for different damage stages. Finally, the effects of brick masonry infill on seismic performance are discussed.