Abstract

Info

Title:: Seismic Fragility Analysis of Frame-wall High-rise Structures Under Near-fault Ground Motions

Author(s):: YI Wei-jian; SUN Wen; School of Civil Engineering, Hunan University

Keywords:: near-fault ground motion; fragility analysis; frame-wall; high-rise structure

Abstract:: A comparative study was carried out to examine the seismic behavior of high-rise frame-wall structures subjected to far-fault and near-fault earthquakes. Four performance levels and corresponding quantitative damage states were defined according to the Chinese code. Two ground motion bins consisting of 20 records each were generated and classified as far-fault and near-fault motions based on distance to fault rupture. Considering the randomness of input ground motions, seismic fragility analysis was carried out on two frame-wall structures with different heights, and the relative seismic fragility curve was given. The relative seismic performance of the two structures designed according to the Chinese code was compared. The results show that the 20-story structure is likely to experience higher interstory drifts than the 30-story structure and that near-fault ground motions are more damaging than far-fault ground motions.