波形钢腹板组合箱梁桥的抗震性能研究

发布时间：2018-04-03 00:22

本文选题：桥梁　切入点：波形钢腹板组合箱梁　出处：《湖南大学》2014年硕士论文

【摘要】：波形钢腹板组合箱梁由混凝土顶、底板和波形钢腹板组成，采用波折形钢板替代传统混凝土箱梁的混凝土腹板，能够大大减轻了上部结构的自重，实现桥梁结构的轻型化，并进一步增大桥梁结构的跨越能力。随着波形钢腹板组合箱梁桥在我国被大量推广和应用，目前更多的研究偏向于其基本力学特性及设计方法的研究，而对于波形钢腹板组合箱梁桥地震性能的研究却很少，因此有必要对其在地震作用下的抗震性能进行的研究，以确保这种新型桥梁结构能经受地震的考验。本文围绕波形钢腹板组合箱梁桥地震响应特征主要进行了以下几方面的工作：（1）首先查阅了大量中外文献资料，对地震灾害的特性及震害特点进行了论述，总结了常见的桥梁震害的表现形式。同时，回顾了波形钢腹板组合箱梁桥的发展历程，特别对其抗震性能的研究现状进行了论述总结；最后结构基于性能的抗震设计热点，对桥梁地震易损性分析理论进行了介绍。（2）以一座典型的山区多跨桥梁为例，上部结构分别采用波形钢腹板组合箱梁和常规混凝土箱梁两种截面形式进行设计，然后基于MIDAS Civil有限元程序建立了有限元动力分析模型，，对两者的动力特性进行了比较分析。（3）根据最新的桥梁抗震设计规范，基于前一节的整体分析模型（多联结构体系），采用反应谱分析方法对波形钢腹板组合箱梁桥和传统混凝土箱梁桥进行分析。分别考虑两种工况：纵桥向输入和横桥向输入。对比分析了波形钢腹板组合箱梁桥与传统混凝土箱梁桥地震响应的差异。（4）以整体桥梁中的中间联为例，基于OpenSees源代码分析平台，建立了桥梁结构的弹塑性有限元动力模型，并输入了100条地震波进行时程分析。根据计算结果，基于桥梁地震易损性分析原理，对波形钢腹板组合箱梁桥和传统混凝土箱梁桥进行地震易损性分析，对比分析波形钢腹板组合箱梁桥与传统混凝土箱梁桥易损性的差异。（5）对中美规范中桥梁合理抗震体系的相关内容进行比较分析，对合理抗震体系的基本特征和主要内容进行了总结。然后，结合本文的研究对象，从合理抗震体系的角度对波形钢腹板组合箱梁桥的特点进行论述。（6）对本文的研究工作进行了总结，批出了本文研究的不足之处。并对后续值得展开的工作进行了展望。
[Abstract]:The corrugated steel web composite box girder is composed of concrete top, bottom plate and corrugated steel web. The corrugated steel plate is used to replace the concrete web of the traditional concrete box girder, which can greatly reduce the weight of the superstructure and realize the light construction of the bridge structure.And further increase the bridge structure span capacity.With the wide application of corrugated steel web composite box girder bridges in China, more researches are focused on their basic mechanical properties and design methods, but few on seismic performance of corrugated steel web composite box girder bridges.Therefore, it is necessary to study the seismic behavior of the bridge structure under earthquake to ensure that the new bridge structure can withstand the earthquake test.In this paper, the seismic response characteristics of composite box girder bridge with corrugated steel webs are studied in the following aspects:In this paper, the characteristics of earthquake disaster and the characteristics of earthquake disaster are discussed, and the common forms of bridge earthquake damage are summarized.At the same time, the development course of the composite box girder bridge with corrugated steel web is reviewed, especially the research status of its seismic performance is summarized. Finally, the seismic vulnerability analysis theory of the bridge is introduced based on the focus of performance-based seismic design.Taking a typical multi-span bridge in mountainous area as an example, the superstructure is designed in the form of corrugated steel web composite box girder and conventional concrete box girder, and then the finite element dynamic analysis model is established based on MIDAS Civil finite element program.The dynamic characteristics of the two are compared and analyzed.According to the latest code for seismic design of bridges, based on the whole analysis model of the previous section, the response spectrum analysis method is used to analyze the corrugated steel web composite box girder bridge and the traditional concrete box girder bridge.Two conditions are considered: longitudinal bridge input and transverse bridge input.The difference of seismic response between the corrugated steel web composite box girder bridge and the traditional concrete box girder bridge is compared and analyzed.Taking the intermediate connection of the whole bridge as an example, the elastic-plastic finite element dynamic model of the bridge structure is established based on the OpenSees source code analysis platform, and 100 seismic waves are input for the time-history analysis.According to the calculation results, based on the seismic vulnerability analysis principle of bridges, the seismic vulnerability analysis of composite box girder bridges with corrugated steel webs and traditional concrete box girder bridges is carried out.The difference of vulnerability between corrugated steel web composite box girder bridge and traditional concrete box girder bridge is analyzed.This paper makes a comparative analysis of the relevant contents of the reasonable seismic system of bridges in Chinese and American codes, and summarizes the basic characteristics and main contents of the reasonable aseismic system.Then, the characteristics of the corrugated steel web composite box girder bridge are discussed from the point of view of the reasonable aseismic system combined with the research object of this paper.The research work of this paper is summarized and the deficiency of this study is approved.The future work is also prospected.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55;U448.213

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