摘要
本文以液化土中桩基水平承载特性及抗震设计方法为应用背景,对目前国内外桩基抗震研究现状进行了总结评价。在此基础上,指出在地震液化条件下桩基力学响应和工作性能尚需进一步研究的几个关键问题。主要包括:(1)不同地震动强度作用下的砂土液化前后桩-土相互作用机理及桩周土动力衰减规律;(2)砂土液化和上部结构惯性共同作用下桩基内力分布规律;(3)地震引起的液化场地中直斜桩的受力破坏机理及斜桩动力p-y曲线的建立;(4)利用现有的大型计算软件进行数值仿真模拟,并力争通过二次开发建立与实际情况相吻合的模型及参数,为工程中的桩基抗震设计提供理论参考。
In this paper, based on the application background of lateral resistance and seismic design method of pile foundation in liquefiable soil, and the current situation of the seismic research of the pile foundation is summarized and evaluated. On this basis, it is pointed that several key problems of pile need to be further studied under the condition of seismic liquefaction. Mainly out includes:(1) The mechanism of pile-soil interaction and the dynamic attenuated law of soil around pile before and after the liquefaction of sand under different seismic intensity;(2) The combined influence of sand liquefaction and inertia of upper structure on the distribution of internal force for pile;(3) The failure mechanism of vertical and batter pile in liquefaction site caused by earthquake, and establishment of p-y curve of batter pile;(4) The existing large-scale numerical calculation software is used for numerical simulation and try hard to set up the model and parameters which consistent with the actual situation are established through the secondary development, which provide the theoretical reference for the pile foundation design in engineering.
作者
李雨润
张健
戎贤
LI Yurun;ZHANG Jian;RONG Xian(College of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China;Civil Engineering Technology Research Center of Hebei Province,Tianjin 300401,China)
出处
《地震工程与工程振动》
CSCD
北大核心
2018年第6期171-181,共11页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(51778207)
河北省自然科学基金项目(E2018202107)~~
关键词
不同地震动强度
液化土
桩-土相互作用
斜桩
数值仿真
different seismic intensity
liquefied soil
pile-soil interaction
batter pile
numerical simulation
作者简介
李雨润(1978-),男,教授,博士,主要从事土动力学与桩基抗震研究.E-mail:iemlyr7888@hebut.edu.cn;通讯作者:张健(1991-),男,博士研究生,主要从事桩基抗震方面研究.E-mail:201521601031@stu.hebut.edu.cn.
