基于振动台试验的刚构桥近断层效应动力响应分析

闫晓宇; 赵卓; 王卓

doi:10.13204/j.gyjzG20070717

基于振动台试验的刚构桥近断层效应动力响应分析

doi: 10.13204/j.gyjzG20070717

闫晓宇^1,2,
赵卓³,
王卓¹

1. 国家开放大学理工教学部, 北京 100039;
2. 天津大学滨海土木工程结构与安全教育部重点实验室, 天津 300072;
3. 北京工业大学城市建设学部, 北京 100124

详细信息

作者简介:
闫晓宇,女,1984年出生,博士。电子信箱:yxy840222@163.com

计量
- 文章访问数: 64
- HTML全文浏览量: 5
- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2020-07-07
- 网络出版日期: 2021-04-30

DYNAMIC RESPONSE ANALYSIS OF NEAR-FAULT EFFECTS OF RIGID-FRAMED BRIDGES BASED ON SHAKING TABLE TESTS

1. School of Engineering, the Open University of China, Beijing 100039, China;
2. Key Laboratory of Coast Civil Structure Safety of China Ministry of Education, Tianjin University, Tianjin 300072, China;
3. Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, China

摘要

摘要: 对1∶10比例三跨刚构桥模型进行考虑多点激励的缩尺模型振动台台阵试验，在此基础上建立模型桥的有限元模型，选取了10条典型的近断层地震动和10条远场地震动，对其作用下刚构桥的动力响应进行对比分析。研究表明：地震动空间效应对桥墩变形、受力均为不利因素，其影响程度与墩梁约束形式、波速的取值密切相关；与远场地震动相比，近断层地震动（峰值速度与峰值加速度的比值a_PGV/a_PGA）较大；考虑近断层效应后，桥墩变形、受力均发生增长，主梁跨中弯矩与主梁水平位移也相继增大。因此，近断层效应、地震动空间效应在抗震设计中均应该予以考虑，使分析结果更准确。
- 刚构桥 /
- 多点激励 /
- 振动台阵试验 /
- 动力响应 /
- 近断层地震
Abstract: A shaking tables test considering multi-support excitation was conducted on the 1∶10 scale three-span rigid-framed bridge. Taking the results of the test as a base, the finite element model of the bridge was established. Ten typical near-fault ground motions were selected for analysis. Then, the comparative analysis of the dynamic responses between the far-field ground motions and near-fault ground motions was completed. The research showed that the spatial effect of ground motion was unfavorable to the deformation and stress of piers, and its influence was closely related to the constraint forms of piers and girders and the wave velocity. Compared with the far-field ground motion, the a_PGV/a_PGA of the near-fault ground motion was larger. Considering the near-fault effect, the deformation and stress of the piers increased, and the mid-span bending moment and horizontal displacement of the main girders also increased. Therefore, near-fault effect and ground motion spatial effect should be considered in seismic design to make the analysis results more accurate.
- rigid-framed bridge /
- multi-support excitation /
- shaking table test /
- dynamic response /
- near-fault ground motion

HTML全文

参考文献(13)

BONGANOFF J L, GOLDBERG J E, SCHIFF A J. The Effect of Ground Transmission Time on the Response of Long Structures[J]. Bulletin of the Seismological Society of America, 1965, 55(3):627-640.

陈彦江,郝朝伟,闫维明.考虑行波效应的高墩刚构桥地震易损性分析[J].世界地震工程,2016,32(3):179-184.

李杰,陈淮,王艳.双薄壁高墩曲线连续刚构桥地震响应分析[J].世界地震工程,2012,28(4):36-43.

洪浩,郑史雄,贾宏宇,等.考虑行波效应的高墩大跨刚构桥随机地震动响应研究[J].世界地震工程,2013,29(2):54-60.

陈志伟,蒲黔辉,李晰,等.行波效应对大跨连续刚构桥易损性影响分析[J].西南交通大学学报,2017,52(1):23-59.

HAN Q,DU X,LIU J,et al. Seismic Damage of Highway Bridges During the 2008 Wenchuan Earthquake[J]. Earthquake Engineering and Engineering Vibration,2009,8(2):262-273.

BERTER V V,MAHIN S A,HERRERA R A. A Seismic Design Implications of Near-Fault San-Fernando Earthquake Records[J]. Earthquake Engineering & Structural Dynamics,1978,6(1):31-42.

JALALI R S, BAHARI J M, TRIFUNAC M D. Earthquake Response of a Three-Span, Simply Supported Bridge to Near-Field Pulse and Permanent-Displacement Step[J]. Soil Dynamics and Earthquake Engineering, 2012, 43:380-397.

李宁,李忠献,李杨. 近断层地震动作用下桥梁结构易损性曲面分析[J]. 地震工程与工程振动,2014,34(增刊1):307-312.

翟长海,张林春,李爽,等.近场地震动对大跨刚构桥影的分析[J].防灾减灾工程学报,2010(增刊1):143-147.

ISMAIL M, CASAS J R, RODELLAR J. Near-Fault Isolation of Cable-Stayed Bridges Using RNC Isolator[J]. Engineering Structures, 2013, 56:327-342.

KARALAR M,PADGETT J E,DICLELI M. Parametric Analysis of Optimum Isolator Properties for Bridges Susceptible to Near-Fault Ground Motions[J]. Engineering Structures,2012, 40:276-287.

屈铁军,王君杰,王前信. 空间变化的地震动功率谱的实用模型[J]. 地震学报, 1996,18(1):55-62.

施引文献

资源附件(0)

访问统计