可液化河谷场地简支梁桥的地震反应分析

被引：9

作者：

王晓伟

李闯

叶爱君

商宇

机构：

[1] 同济大学土木工程防灾国家重点实验室

来源：

中国公路学报 | 2016年 / 29卷 / 04期

关键词：

桥梁工程; 地震反应; 有限元方法; 简支梁桥; 液化;

D O I：

10.19721/j.cnki.1001-7372.2016.04.011

中图分类号：

U442.55 [];

学科分类号：

0814 ; 081406 ;

摘要：

为分析可液化河谷场地简支梁的地震反应,首先基于OpenSees,采用二维场地-结构整体化模拟方法对某离心机试验进行了数值模拟,并验证模拟方法的可靠性;然后建立了一座典型河谷场地-三跨简支梁桥的有限元模型,分析场地液化与否对场地及简支梁桥各部件地震反应的影响。结果表明:与输入地震的加速度谱相比,液化场地可延长地表土体加速度反应的卓越周期;与场地未液化相比,场地液化可导致地面大变形,桩基础在桩顶和土层分界处的弯矩、桥墩倾斜程度、滑动支座位移均有所增加,但场地液化与否对墩底弯矩的影响很小。

引用

页码：85 / 95

页数：11

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