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[1]SHI Yan,ZHANG Zhichao,LI Jun,et al.Seismic Fragility of the Long-span,Continuous,Rigid-frame Bridge with High-rise Pier Involving the State of the Internal Force[J].Journal of Seismological Research,2022,45(01):8-16.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0002 ]

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Seismic Fragility of the Long-span,Continuous,Rigid-frame Bridge with High-rise Pier Involving the State of the Internal Force

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 45 Number of periods: 2022 01 Page number: 8-16 Column: Public date: 2022-01-20

Title:: Seismic Fragility of the Long-span,Continuous,Rigid-frame Bridge with High-rise Pier Involving the State of the Internal Force

Author(s):: SHI Yan; ZHANG Zhichao; LI Jun; WANG Wenxian; WANG Rui; (School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,Gansu,China)

Keywords:: continuous; rigid-frame bridge; construction process; equivalent load method; state of the internal force; seismic fragility

CLC:: U448.23

DOI:: 10.20015/j.cnki.ISSN1000-0666.2022.0002

Abstract:: To investigate seismic fragility of the continuous,rigid-frame bridge involving internal force state,an irregular,long-span,continuous,rigid-frame bridge with high piers was selected as the background project.The simulation of construction process and the analysis of nonlinear dynamic were carried out by using MIDAS/Civil and OpenSees platforms.Then an equivalent load method was used to apply the equivalent loads of internal force to the OpenSees model.Forty groups of typical near-fault ground motion records were selected for input,then the seismic fragility of the bridge with additional equivalent loads was analyzed through OpenSees by the Incremental Dynamic Analysis method.Finally,the influence of internal force state on the seismic fragility of the continuous,rigid-frame bridge was compared and analyzed.The results show that the state of the internal force of the main bridge can be accurately calculated and simulated by the formulas for the equivalent loads of the internal force,and the seismic fragility of the main piers and approach piers is affected by the state of the internal force.If the state of the internal force is not taken into consideration,the seismic damage probability of the main pier and the approach pier will be underestimated.

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Last Update: 2022-01-20