混合梁斜拉桥整体与局部计算分析
发布时间：2018-09-12 11:51
【摘要】：伴随着斜拉桥建造事业的不断进步与成长，混合梁式斜拉桥以其良好的力学特性以及优越的经济特性，逐步获得桥梁设计者的青睐。论文首先简单介绍了斜拉桥、混合梁斜拉桥的国内外发展概况以及结构受力特性，继而从结构整体以及局部两个方面对混合梁斜拉桥加以阐述和分析，，另外还介绍了桥梁结构的动力特性的相关理论。 论文以环巢湖某混合梁斜拉桥为工程背景，建立全桥空间有限元模型，分析该桥梁在不同施工阶段的受力以及变形情况；同时，简要分析在运营阶段不同荷载作用下，斜拉桥的受力状况。在静力分析建立的全桥有限元模型的基础上，完善得到该桥动力计算的分析模型，从而对该混合梁斜拉桥的动力特性进行计算和分析，包括自振频率以及反应谱方法的分析。论文进一步运用ANSYS有限元软件，建立钢—混结合段局部有限元模型，在运营阶段最不利荷载工况的荷载作用下，计算分析钢—混结合段应力以及分布，验明了钢—混结合段设计的安全性和合理性。论文研究对同类型桥梁的设计和施工监控有一定的参考意义。
[Abstract]:With the continuous progress and growth of cable-stayed bridge construction, hybrid girder cable-stayed bridge has been gradually favored by bridge designers for its good mechanical properties and superior economic characteristics. Firstly, the paper introduces the development of cable-stayed bridge and hybrid cable-stayed bridge at home and abroad, and analyzes the structural characteristics of cable-stayed bridge with hybrid beam from the whole and local aspects of the structure. In addition, the theory of dynamic characteristics of bridge structure is introduced. Taking a hybrid girder cable-stayed bridge around Chaohu Lake as the engineering background, the paper establishes the finite element model of the whole bridge space, analyzes the stress and deformation of the bridge in different construction stages, and briefly analyzes the different loads in the operation stage. The stress condition of cable-stayed bridge. On the basis of the finite element model of the whole bridge established by static analysis, the dynamic analysis model of the bridge is perfected, and the dynamic characteristics of the hybrid girder cable-stayed bridge are calculated and analyzed, including the analysis of the natural vibration frequency and the response spectrum method. In this paper, the local finite element model of steel-concrete joint section is established by using ANSYS software. The stress and distribution of steel-concrete joint section are calculated and analyzed under the load of the most unfavorable load condition in the operation stage. The safety and reasonableness of the design of steel-mixing joint section are verified. The research in this paper has certain reference significance for the design and construction monitoring of the same type of bridge.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.27
本文编号：2238919
[Abstract]:With the continuous progress and growth of cable-stayed bridge construction, hybrid girder cable-stayed bridge has been gradually favored by bridge designers for its good mechanical properties and superior economic characteristics. Firstly, the paper introduces the development of cable-stayed bridge and hybrid cable-stayed bridge at home and abroad, and analyzes the structural characteristics of cable-stayed bridge with hybrid beam from the whole and local aspects of the structure. In addition, the theory of dynamic characteristics of bridge structure is introduced. Taking a hybrid girder cable-stayed bridge around Chaohu Lake as the engineering background, the paper establishes the finite element model of the whole bridge space, analyzes the stress and deformation of the bridge in different construction stages, and briefly analyzes the different loads in the operation stage. The stress condition of cable-stayed bridge. On the basis of the finite element model of the whole bridge established by static analysis, the dynamic analysis model of the bridge is perfected, and the dynamic characteristics of the hybrid girder cable-stayed bridge are calculated and analyzed, including the analysis of the natural vibration frequency and the response spectrum method. In this paper, the local finite element model of steel-concrete joint section is established by using ANSYS software. The stress and distribution of steel-concrete joint section are calculated and analyzed under the load of the most unfavorable load condition in the operation stage. The safety and reasonableness of the design of steel-mixing joint section are verified. The research in this paper has certain reference significance for the design and construction monitoring of the same type of bridge.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.27
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