期刊论文

Sesimic response sensitivity analysis of pile supported bridge structures in liquefiable ground

Ye, Ai-Jun(yeaijun@tongji.edu.cn)

中文

工程力学

Engineering Mechanics

1000-4750

2016

33

8

132-140

10.6052/j.issn.1000-4750.2015.01.0022

国家自然科学基金项目(51278375)； 国家973项目(2013CB036302)；

本校为其他机构

地震反应的有效估计是液化场地桥梁结构设计、加固改造的必要环节,但通过数值模拟手段获得的结果易受模型参数变化的影响.为探究影响液化场地桥梁结构地震反应的控制性参数,该文首先建立了某离心机试验的场地-结构整体有限元模型,通过数值分析与试验结果的对比验证了数值方法的可靠性;然后,建立了上覆粘土层-松砂层-密砂层的典型倾斜液化场地-桩柱式桥梁结构有限元模型,采用龙卷风图和一次二阶矩方法,以场地和结构的主要物理性质为分析参数,进行场地、结构地震反应的敏感性分析.结果表明:场地、结构的地震反应与各分析参数大体上呈线性或低非线性的变化关系;在所研究的参数中,液化松砂层的内摩擦...

Numerical prediction on seismic response of liquefiable soil-structure system is susceptible to varying model input parameters. In order to detect soil parameters that have most significant effects on the seismic response of pile-soil-bridge structure system in liquefiable ground, this paper firstly calibrated the numerical approach by simulating a centrifuge testing. A typical model of pile supported bridge structure embedded into an inclined ground with three layers (overburden clay crust, saturated loose sand and dense sand, respectively) was then established. Sensitivity analysis focused o...