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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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上承式大跨度钢管混凝土拱桥地震反应分析
, PP. 64-67
Keywords: 桥梁工程,地震反应分析,ANSYS,上承式钢管混凝土拱桥
Abstract:
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EICentro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。
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