基于Pushover分析的斜梁桥抗震性能研究  

Study on the seismic performance analysis and evaluation of skewed beam bridges based on Pushover analysis

作　　者：熊红平 段银芳 赵瀚迪 吴亮秦[2] 李涛 Xiong Hongping;Duan Yinfang;Zhao Handi;Wu Liangqin;Li Tao(Nanchang Municipal Engineering Project Management Co.,Ltd.,Nanchang Jiangxi 330000,China;East China Jiaotong University,Nanchang Jiangxi 330013,China)

机构地区：[1]南昌市政公用工程项目管理有限公司,江西南昌330000 [2]华东交通大学,江西南昌330013

出　　处：《山西建筑》2025年第5期6-11,共6页Shanxi Architecture

基　　金：国家自然科学基金项目(项目编号:52308502,52468023);江西省自然科学基金项目(项目编号:20224BAB214065,20224BAB204064)。

摘　　要：为确立基于Pushover分析的桥梁抗震分析评价方法,以三跨连续斜梁桥为研究对象,基于实桥资料确定桥址为Ⅱ类场地,地震动的烈度为8度,并由规范反应谱拟合出与反应谱相容的7条地震波,分别进行了对应于E1和E2地震作用的非线性时程分析、Pushover分析和反应谱分析下的抗震分析评价。结果表明,Pushover分析不仅可快速直观地用于E1地震作用下的线弹性抗震分析评价,还能够在E2地震作用下的弹塑性分析中达到与非线性时程分析较接近的结果。In order to establish an evaluation method for seismic analysis of bridges based on Pushover analysis,this paper focuses on a three-span continuous skewed beam bridge to perform the analysis.Based on actual bridge data,the construction site is classified as site classⅡ,and the seismic intensity is determined to be 8 degrees.Seven ground motion records compatible with the determined response spectrum are generated.Nonlinear time history analysis,Pushover analysis,and response spectrum analysis are performed under the corresponding seismic actions E1 and E2.The results indicate that Pushover analysis can be used for rapid and intuitive linear elastic seismic analysis under E1 seismic action,and it also yields results close to those of nonlinear time history analysis in the elastoplastic analysis under E2 seismic action.

关 键 词：PUSHOVER分析 斜梁桥 地震作用 抗震性能 弹塑性 

分 类 号：TU997[建筑科学—市政工程] U448.21[建筑科学—桥梁与隧道工程]