Shake Table Response of RC Bridge Piers to Near-Fault Earthquake

摘要

Near fault ground motion (NFGM) is a single long period velocity pulse of large magnitude.rnThese earthquakes have caused severe and impulsive damage on various infrastructures because thernepicentre is close to the urban area. These characteristics are unique compared to the far-faultrnground motion (FFGM), upon which nearly all seismic design criteria are based. The objective ofrnthis study is to explore the shake table response of reinforced concrete bridge piers and torninvestigate near-fault ground motion effects on reinforced concrete bridge piers compared to thosernby the far fault ground motion. The seismic performance of two RC bridge piers under near-faultrnand far fault ground motions was investigated on the shake table. In addition, comparative testsrnwere made for RC bridge piers subjected to Pseudo-dynamic loadings and Quasi-Static loadings.rnTest results showed that NFGM generally induced worse seismic performance than FFGM.