桩-土水平弹簧系数对桥梁地震反应影响的参数分析

发布时间：2018-05-26 21:43

本文选题：地震 + 桩-土相互作用　；参考：《振动与冲击》2017年14期

【摘要】：集中参数法是目前土木工程抗震计算中考虑桩土地震相互作用的实用方法。从有限元方法的角度来看,集中参数方法将地层半无限空间模型化为一个无几何尺度的抽象的力学单元,这里称其为宏单元,其计算模型的选用和参数确定直接影响计算结果的精度。针对不同的地震动输入和工程中各种常见的土层,基于考虑土体非线性的Boulanger宏单元,m法和Mindlin解等三种桩—土水平弹簧模型,进行了详尽的参数分析工作,旨在说明对桥梁地震反应影响很大的桩-土水平弹簧系数的取值问题。
[Abstract]:The lumped parameter method is a practical method to consider the pile-soil seismic interaction in the seismic calculation of civil engineering at present. From the point of view of finite element method, the lumped parameter method models the stratum semi-infinite space into an abstract mechanical element without geometric scale, which is called macro element here. The choice of the calculation model and the determination of the parameters directly affect the accuracy of the calculation results. Based on three kinds of pile-soil horizontal spring models, such as Boulanger macro element method and Mindlin solution, three kinds of pile-soil horizontal spring models, which take into account the nonlinearity of soil mass, are analyzed in detail for different ground motion input and various common soil layers in engineering. The purpose of this paper is to explain the value of the pile-soil horizontal spring coefficient which has great influence on the seismic response of the bridge.
【作者单位】：同济大学土木工程学院;
【基金】：国家重点基础研究发展计划(2013CB036305) 国家自然科学基金项目(51278373;51438010)
【分类号】：U442.55

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