[1]吕杨,赵征,王建涛,等.墩底可抬升刚构桥模型振动台试验研究[J].地震工程与工程振动,2022,42(02):071-77.[doi:10.13197/j.eeed.2022.0208]
　LV Yang,ZHAO Zheng,WANG Jiantao,et al.Shaking table tests of a rigid frame bridge with footing separation[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2022,42(02):071-77.[doi:10.13197/j.eeed.2022.0208]
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墩底可抬升刚构桥模型振动台试验研究
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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:
071-77
栏目:
论文
出版日期:
2022-04-30

文章信息/Info

Title:
Shaking table tests of a rigid frame bridge with footing separation
作者:
吕杨1;  赵征1;  王建涛1;  杨子奇2;  陈宇3
1. 天津城建大学 天津市土木建筑结构防护与加固重点实验室, 天津 300384;
2. 新西兰奥克兰大学土木与环境工程学院, 奥克兰1142;
3. 中国民航大学 交通科学与工程学院, 天津 300300
Author(s):
LV Yang1;  ZHAO Zheng1;  WANG Jiantao1;  YANG Ziqi2;  CHEN Yu3
1. Tianjin Key Laboratory of Civil Structure Protection and Reinforcement, Tianjin Chengjian University, Tianjin 300384, China;
2. Department of Civil and Environmental Engineering, the University of Auckland, Auckland 1142, New Zealand;
3. School of Transportation Science and Engineering, Civil Aviation University of China, Tianjin 300300, China
关键词:
振动台试验; 刚构桥; 单墩桥; 基底抬升
Keywords:
shaking table test; rigid frame bridge; single-column bridge; footing separation
分类号:
U448.23
DOI:
10.13197/j.eeed.2022.0208
摘要:
桥墩基础抬升可以切断地震动向上部结构传播，基础与地基碰撞还可以耗散地震能量，然而已有研究大多集中在数值模拟或理论分析，缺乏大型振动台试验验证。文中设计制作了一座基础固接和基础可抬升的连续刚构桥模型并进行振动台试验。对2种模型的动力特性、加速度响应和位移响应等进行对比分析。结果表明：基础可抬升桥梁较基础固接桥梁固有频率小；基础抬升将增大桥面梁位移、减小桥墩弯矩；地震激励的频率特性对桥梁结构地震响应影响显著。
Abstract:
Transient and partial separation of bridge footings from the support would reduce the transmitted seismic loading from the ground and cause re-contact impacts at the footing-support interface,thus dissipating energy from structures. However,most of the research has been done numerically or analytically. In the present study,a scaled down bridge was designed and built. This bridge can simulate two footing conditions,i.e. fixed and footing separation. Shaking table tests were carried out on the bridge of different footing conditions to examine the dynamic properties,acceleration and displacement responses. Results indicate that partial footing separation was prone to increase the displacement of the girder while reducing the bending moment in the pier. Also,the footing separations were more dominated by the frequency than the amplitude of excitations.

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备注/Memo

备注/Memo:
收稿日期:2021-5-9;改回日期:2021-8-30。
基金项目:国家自然科学基金项目（52178295，51808270）
作者简介:吕杨(1984-),男,教授,博士,主要从事结构抗震研究.E-mail:lvyangtju@163.com
通讯作者:陈宇(1987-),男,讲师,博士,主要从事桥梁结构抗震研究.E-mail:tjucy@tju.edu.cn
更新日期/Last Update: 1900-01-01