Study on seismic response control of a single-tower self-anchored suspension bridge with elastic-plastic steel damper  

作　　者：WANG Hao ZHOU Rui ZONG ZhouHong WANG Chen LI AiQun 

机构地区：[1]Key Laboratory of Concrete&Prestressed Concrete Structure of Ministry of Education,Southeast University,Nanjing 210096,China

出　　处：《Science China(Technological Sciences)》2012年第6期1496-1502,共7页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 50908046);the Teaching & Scientific Research Fund for Excellent Young Teachers of Southeast University,the Basic Scientific &Research Fund of Southeast University (Grant Nos. 3205001101,Seucx201106);the Priority Academic Program Development Foundation of Jiangsu Higher Education Institutions are gratefully acknowledged

摘　　要：Elastic-plastic steel damper(EPSD) is a new device controlling seismic responses.The mechanical principle of EPSD was presented and a comparison was conducted between the theoretical formulas and finite element(FE) simulation of damper units.The verified force-displacement hysteretic curve of the damper system was obtained with reference to tests.The Nanjing Jiangxinzhou Bridge(NJB) was subsequently taken as the case to investigate the seismic response control effect of EPSDs on single-tower self-anchored suspension bridges.A 3-dimensional FE model of the bridge was established in ANSYS and the dynamic and static analyses of the bridge were conducted,the control effect of EPSDs under different seismic waves was further investigated through nonlinear time-history analysis based on the validated model.Results showed that both the simplified theoretical and FE simulation methods can preferable reflect the mechanical performance of EPSD,and that seismic responses of NJB with EPSDs are better than those with elastic connection device or fluid viscous damper.However,the control effect of EPSDs is influenced by seismic wave characteristics.

关 键 词：elastic-plastic steel damper single-tower self-anchored suspension bridge FE model validation nonlinear time-historyanalysis seismic response control 

分 类 号：TU352.11[建筑科学—结构工程] TU352.101