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[1]SHEN Huijun,WANG Hao,ZHENG Wenzhi,et al.Fragility Analysis of the Round-ended Pier of High-speed Railway Bridges Subjected to Multi-dimensional Ground Motions[J].Journal of Seismological Research,2021,44(02):225-232.

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Fragility Analysis of the Round-ended Pier of High-speed Railway Bridges Subjected to Multi-dimensional Ground Motions

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 44 Number of periods: 2021 02 Page number: 225-232 Column: Public date: 2021-06-30

Title:: Fragility Analysis of the Round-ended Pier of High-speed Railway Bridges Subjected to Multi-dimensional Ground Motions

Author(s):: SHEN Huijun¹; 2; 3; WANG Hao¹; ZHENG Wenzhi¹; LIANG Ruijun¹; SHA Ben¹; XU Junhong⁴; (1.Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 210096,Jiangsu,China)(2.Second Harbour Engineering Co.[KG-*3],Ltd.,China Communications Construction Company Ltd.[KG-*3],Wuhan 430040,H

Keywords:: high-speed railway bridge; round-ended pier; seismic fragility; multi-dimensional ground motions; relative displacement ductility ratio; input angle of the ground motion

CLC:: U442.5+5

DOI:: -

Abstract:: The round-ended pier is widely used for high-speed railway bridges.In order to study its fragility subjected to multi-dimensional ground motions,the finite element model of a typical three-span,continuous girder bridge of the high-speed railway is performed based on OpenSees.Then,the relative displacement ductility ratio of the pier is defined as the damage index,and its limit values for the damage state of each fixed pier are determined.Finally,in the case of different angles of input ground motions,seismic responses of the fixed middle pier along the longitudinal and the transverse directions are compared based on the vulnerability analysis method.Results show that:① The average peak displacement the fixed middle pier along the longitudinal direction is much larger than that along of the transverse direction on condition of the same input angle; ② On condition of the same PGA and input angle,the failure probability of the fixed middle pier along the longitudinal direction is significantly higher than that along the transverse direction.Therefore,the failure probability along the longitudinal direction should be given priority in pier designing; ③ The fluctuation of the contour plots for the fragility of the fixed middle pier along the longitudinal direction in different damage states is obviously higher than that along the transverse direction.Hence the effect of the input angle of the ground motion on the fixed middle pier should be a matter of concern.

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Last Update: 2021-06-30