Abstract

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Title:: Analysis on Seismic Performance of Semi-integral Abutment Jointless Skew Bridge

Author(s):: ZHUANG Yi-zhou; LI Zeng-feng; CHENG Jun-feng; XU Liang; College of Civil Engineering, Fuzhou University

Keywords:: semi-integral abutment jointless skew bridge; dynamic response spectra; time history analysis; skew angle; abutment-soil interaction

Abstract:: In order to grasp the features of vibration and seismic response of semi-integral jointless skew bridge, a finite element model of Huzhou Guanbian bridge was established with MIDAS/Civil. The dynamic characteristic analysis was carried out, and the response spectra method and time history were conducted to analyze the seismic response of semi-integral jointless skew bridge. The results show that the constraining effect of soil behind the abutment is weakened gradually with the decrease of skew angle of bridge. The effect of soil behind abutment is benefit to semi-integral abutment jointless skew bridge, which can restrict its longitudinal float effectively. The internal force of pier bottom and displacement of pier top calculated with response spectra method are even larger than those with time history analysis method during seismic safety analysis. The seismic safety of the type of bridge should be governed by the displacement of pier top caused by the fixed bearing while inputting the earthquake motion perpendicular to cap. The study results provide references data for the seismic design and research of semi-integral jointless skew bridge and promote the development and actual engineering application of the semi-integral jointless skew bridge.