上承式大跨度钢管混凝土拱桥地震反应分析.doc

上承式大跨度钢管混凝土拱桥地震反应分析
张波1, 李术才1,杨学英2,孙国富1,葛颜慧1,魏建军3,李传夫1
(山东大学岩土与结构工程研究中心,山东济南 250061)
(山东城市建设职业学院,山东济南 250014)
(中国矿业大学,江苏徐州 221008)
摘要:为研究上承式大跨度钢管混凝土拱桥的地震反应性能,以大型有限元计算软件ANSYS为平台,分别以纵向+竖向和横向+竖向迁安波与EI Centro波作为输入地震波,对跨径为430m的上承式钢管混凝土拱桥——支井河特大桥进行了地震反应分析。研究结果表明:前10阶振动以侧向振动为主,表明桥纵向刚度远大于侧向刚度;拱肋抗震设计最危险截面是拱脚截面,地震反应内力最大;横向+竖向地震动输入时拱肋轴力及弯矩Mz略大于纵向+竖向地震动输入时,相差幅度不大,但横向+竖向地震动输入时弯矩My远大于纵向+竖向地震动输入;在横向+竖向地震动输入下最危险截面――拱脚处的地震反应轴力内侧拱肋大于外侧拱肋。
关键词:桥梁工程; 地震反应分析; ANSYS; 上承式钢管混凝土拱桥; 支井河特大桥
中图分类号: 文献标识码:A
The Seismic Response Analysis of Deck-type Long-Span CFST Arch Bridge
ZHANG Bo1, Li Shu-cai1, YANG Xue-ying2, SUN Guo-fu 1,GE Yan-hui 1, WEI Jian-jun3, LI Chuan-fu1
(Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061,China)
(Shandong Urban Construction Vocational College,Jinan 250014,China)
(China University of Mining and Technology, Xuzhou, 221008, China)
Abstract: In order to study the seismic response of deck-type long span CFST(concrete filled steel tube) arch bridge, the deck-type CFST arch bridge—Zhijinghe Great Bridge with 430m span was analyzed putation program ANSYS, which the Qianan seismic wave and EI Centro wave were taken as the input waves. The results show that most vibrations in the first 10 steps are in the cross direction of bridge which indicates that stiffness in lengthwise direction of bridge is larger than that in cros