斜拉模型桥地震易损性研究
发布时间：2018-08-09 13:17
【摘要】：近年来,基于性能的桥梁结构地震易损性分析已然成为当下研究热点之一,国内外学者对此进行了广泛且深入的研究,但因条件限制,理论易损性曲线尚未得到实测地震响应结果的有效验证。随着振动台试验技术的快速发展,振动台试验也越来越先进化与精确化。论文基于OpenSEES有限元分析软件,对某特大斜拉桥模型进行理论地震易损性分析,并通过振动台模型试验进行验证。具体完成了如下工作：1、回顾了国内外斜拉桥振动台和易损性曲线的研究现状,分析关于理论地震易损性曲线目前存在的问题,阐述建立大跨度斜拉桥易损性曲线和进行斜拉模型桥地震易损性的必要性；2、简要介绍了建立理论地震易损性曲线的前期准备过程：地震波的选取、损伤指标的确定、弯矩—曲率分析以及增量动力分析方法的流程；3、详细介绍了斜拉桥模型的工程概况以及有限元模型的建立,为斜拉模型桥地震易损性分析奠定了基础；4、绘制了分别在纵桥向、横桥向地震作用下斜拉模型桥的地震易损性曲线,并进行了对比分析,研究了斜拉模型桥的地震易损性特点；讨论了粘滞阻尼器的减震作用及其对地震易损性的影响。最终用振动台模型试验的损伤结果,验证了理论地震易损性曲线的正确性。
[Abstract]:In recent years, performance-based seismic vulnerability analysis of bridge structures has become one of the current research hot spots. Scholars at home and abroad have carried out extensive and in-depth research, but due to the constraints of the conditions. The theoretical vulnerability curve has not been effectively verified by the measured seismic response results. With the rapid development of shaking table test technology, shaking table test is becoming more and more advanced and accurate. Based on OpenSEES finite element analysis software, the theoretical seismic vulnerability of a large cable-stayed bridge model is analyzed and verified by shaking table model test. The main work is as follows: 1. The research status of vibration table and vulnerability curve of cable-stayed bridge at home and abroad is reviewed, and the existing problems of theoretical seismic vulnerability curve are analyzed. This paper expounds the necessity of establishing the vulnerability curve of long-span cable-stayed bridge and the earthquake vulnerability of cable-stayed model bridge, and briefly introduces the preparatory process for the establishment of theoretical seismic vulnerability curve: the selection of seismic wave and the determination of damage index. The flow chart of moment curvature analysis and incremental dynamic analysis is presented. The engineering survey of cable-stayed bridge model and the establishment of finite element model are introduced in detail, which lays a foundation for seismic vulnerability analysis of cable-stayed model bridge. 4. The seismic vulnerability curves of cable-stayed model bridges under longitudinal and transverse earthquake are drawn, and the characteristics of seismic vulnerability of cable-stayed model bridges are studied. The effects of viscous dampers on seismic vulnerability are discussed. Finally, the damage results of shaking table model test are used to verify the correctness of the theoretical seismic vulnerability curve.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.55;U448.27
本文编号：2174190
[Abstract]:In recent years, performance-based seismic vulnerability analysis of bridge structures has become one of the current research hot spots. Scholars at home and abroad have carried out extensive and in-depth research, but due to the constraints of the conditions. The theoretical vulnerability curve has not been effectively verified by the measured seismic response results. With the rapid development of shaking table test technology, shaking table test is becoming more and more advanced and accurate. Based on OpenSEES finite element analysis software, the theoretical seismic vulnerability of a large cable-stayed bridge model is analyzed and verified by shaking table model test. The main work is as follows: 1. The research status of vibration table and vulnerability curve of cable-stayed bridge at home and abroad is reviewed, and the existing problems of theoretical seismic vulnerability curve are analyzed. This paper expounds the necessity of establishing the vulnerability curve of long-span cable-stayed bridge and the earthquake vulnerability of cable-stayed model bridge, and briefly introduces the preparatory process for the establishment of theoretical seismic vulnerability curve: the selection of seismic wave and the determination of damage index. The flow chart of moment curvature analysis and incremental dynamic analysis is presented. The engineering survey of cable-stayed bridge model and the establishment of finite element model are introduced in detail, which lays a foundation for seismic vulnerability analysis of cable-stayed model bridge. 4. The seismic vulnerability curves of cable-stayed model bridges under longitudinal and transverse earthquake are drawn, and the characteristics of seismic vulnerability of cable-stayed model bridges are studied. The effects of viscous dampers on seismic vulnerability are discussed. Finally, the damage results of shaking table model test are used to verify the correctness of the theoretical seismic vulnerability curve.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.55;U448.27
【引证文献】
相关硕士学位论文 前1条
1 马腾;川藏铁路简支梁桥地震易损性及风险评估研究[D];西南交通大学;2016年
，本文编号：2174190
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