[1]冯忠居,关云辉,张聪,等.强震作用下桩-土-断层非线性动力响应特性[J].地震工程与工程振动,2022,42(02):062-70.[doi:10.13197/j.eeed.2022.0207]
　FENG Zhongju,GUAN Yunhui,ZHANG Cong,et al.Nonlinear dynamic response characteristics of pile-soil-fault under strong earthquake[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2022,42(02):062-70.[doi:10.13197/j.eeed.2022.0207]
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强震作用下桩-土-断层非线性动力响应特性
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《地震工程与工程振动》[ISSN:/CN:]

卷:
42
期数:
2022年02期
页码:
062-70
栏目:
论文
出版日期:
2022-04-30

文章信息/Info

Title:
Nonlinear dynamic response characteristics of pile-soil-fault under strong earthquake
作者:
冯忠居1;  关云辉1;  张聪1;  蔡杰2;  董芸秀3;  林路宇4
1. 长安大学 公路学院, 陕西 西安 710064;
2. 福建省交通建设质量安全中心, 福建 福州 350001;
3. 陇东学院 土木工程学院, 甘肃 庆阳 745000;
4. 厦门路桥工程投资发展有限公司, 福建 厦门 361026
Author(s):
FENG Zhongju1;  GUAN Yunhui1;  ZHANG Cong1;  CAI Jie2;  DONG Yunxiu3;  LIN Luyu4
1. School of Highway, Chang’an University, Xi’an 710064, China;
2. Center for Quality and Safety of Traffic Construction in Fujian Province, Fuzhou 350001, China;
3. School of Civil Engineering, Longdong University, Qingyang 745000, China;
4. Xiamen Road & Bridge Engineering Investment and Development Co., Ltd., Xiamen 361026, China
关键词:
岩土工程; 动力响应; 数值仿真; 跨断层桥梁桩基; 强震区
Keywords:
geotechnical engineering; dynamic response; numerical simulation; cross-fault bridge pile foundation; strong earthquake area
分类号:
U443.15
DOI:
10.13197/j.eeed.2022.0207
摘要:
为研究强震作用下桩－土－断层非线性动力响应特性，依托海文大桥实体工程，选取4种类型（5010波、5002波、Kobe波和El-Centro波）地震波，通过建立桩－土－断层相互作用模型，利用MIDAS/GTS有限元分析软件，研究断层上、下盘桩基加速度响应、桩顶水平位移、桩身弯矩以及剪力响应情况。结果表明：4种类型地震波作用下，断层上盘桩基响应程度相对于断层下盘较大，呈现出显著“上盘效应”；覆盖层土体对桩身加速度放大作用和滤波作用明显；上盘桩顶峰值加速度响应具有滞后性；桩顶加速度及其放大系数在El-Centro波作用时较大；桩顶水平位移峰值在5010波作用时较大；桩顶永久位移、桩身弯矩以及剪力峰值在Kobe波作用时较大。在桥梁桩基抗震设计时，应着重考虑断层上、下盘差异和地震波类型对桩基承载特性的影响。
Abstract:
In order to study the nonlinear dynamic response characteristics of pile-soil-fault under strong earthquake, based on the solid project of Haiwen Bridge,four types of seismic waves(5010 wave,5002 wave,Kobe wave and El-Centro wave)are selected,and the finite element analysis software MIDAS/GTS is used to establish the pile-soilfault interaction model to study the acceleration response of pile foundation,horizontal displacement of pile top, bending moment and shear response of pile. The results show that under the action of four types of seismic waves,the response degree of pile foundation in the upper wall of the fault is larger than that in the lower wall of the fault,showing a significant"upper wall effect". The overburden soil has obvious magnifying and filtering effect on the acceleration of pile body.The response of the peak acceleration at the top of the upper pile has hysteresis.The acceleration of pile top and its magnification coefficient are larger under the action of El-Centro wave.The peak value of horizontal displacement at the top of pile is larger under the action of 5010 wave.The permanent displacement at the top of the pile,the bending moment of the pile and the peak value of shear force are larger under the action of Kobe wave.In the seismic design of bridge pile foundation,the influence of the difference of pile foundation between the upper and lower wall of fault and the type of seismic wave on the bearing characteristics of pile foundation should be considered.

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备注/Memo

备注/Memo:
收稿日期:2021-3-12;改回日期:2021-5-27。
基金项目:国家自然科学基金项目（51708040）；海南省交通科技项目（HNZXY2015－045R）；福建省交通运输科技项目（JXFZ2020－XM0189）
作者简介:冯忠居(1965-),男,教授,主要从事岩土工程、地震工程方面的研究.E-mail:ysf@gl.chd.edu.cn
通讯作者:关云辉(1997-),男,硕士研究生,主要从事岩土工程、桥梁桩基础工程方面的研究.E-mail:ssxxgyh0923@163.com
更新日期/Last Update: 1900-01-01