预制节段拼装桥墩有限元分析

发布时间：2018-04-05 08:36

本文选题：有限元分析　切入点：干接缝　出处：《郑州大学》2015年硕士论文

【摘要】：近年来,预制装配化技术凭借其施工速度快、质量好、环保及对周围交通环境影响小等优点在桥梁建设中得到越来越广泛的应用。作为桥梁下部结构,预制装配化桥墩也顺应着时代在逐渐发展。预制装配化桥墩技术的发展对我国城市化建设及桥梁建设水平的提高有积极的影响。目前主要采用试验研究、解析方法、纤维模型分析方法和实体有限元方法等方法来研究预制装配化桥墩的结构性能,其中采用实体有限元方法相关的研究相对较少。在前人研究基础上,本文采用有限元分析软件建立不同连接方式的预制节段拼装桥墩实体有限元模型,对预制节段拼装桥墩结构性能进行了研究,主要有以下研究内容:1、建立整体现浇桥墩实体有限元模型,并采用满足要求的荷载工况对整体现浇桥墩进行加载得到相应分析结果。对该整体现浇桥墩进行结构计算及二维有限元模型验算,将验算结果与实体有限元模型计算结果进行对比以验证整体现浇桥墩实体有限元模型的正确性,并以整体现浇桥墩的计算结果为基准与预制节段拼装桥墩进行对比分析。2、建立墩身混凝土强度等级及配筋与整体现浇桥墩相同的干接缝预制节段拼装桥墩及胶接缝预制节段拼装桥墩实体有限元模型,采用与整体现浇桥墩相同的荷载工况对干接缝拼装墩及胶接缝拼装墩进行加载,分析计算结果,并将两者计算结果与整体现浇桥墩的计算结果进行对比,以比较各墩结构性能的差异。3、建立墩身混凝土强度等级及配筋与整体现浇桥墩相同但墩身湿接段混凝土龄期不同的三个湿接缝预制节段拼装桥墩实体有限元模型,采用同整体现浇桥墩相同的荷载工况对三者进行加载,对计算结果进行分析,并将三者的计算结果与整体现浇桥墩、干接缝拼装桥墩及预制节段拼装桥墩的计算结果进行对比分析,以比较不同连接方式预制节段拼装桥墩结构性能的差异。本文的研究得到了宁波市桥梁技术科技创新团队(2014B81003)的资助。
[Abstract]:In recent years, prefabricated assembly technology has been more and more widely used in bridge construction with the advantages of fast construction speed, good quality, environmental protection and small impact on the surrounding traffic environment.As the substructure of the bridge, prefabricated and assembled piers also comply with the times in the gradual development.The development of prefabricated and assembled pier technology has a positive effect on the urbanization construction and the improvement of bridge construction level in China.At present, experimental research, analytical method, fiber model analysis method and solid finite element method are mainly used to study the structural performance of precast assembled pier.On the basis of previous studies, the finite element model of precast segmental assembled piers with different connection modes is established by using finite element analysis software, and the structural performance of precast segmental assembled piers is studied.The main research contents are as follows: 1. The solid finite element model of the whole cast-in-place pier is established, and the corresponding analysis results are obtained by loading the monolithic cast-in-place pier under the load condition that meets the requirements.In order to verify the validity of the solid finite element model of the whole cast-in-place pier, the structural calculation and the two-dimensional finite element model are calculated and compared with the results of the solid finite element model.Based on the calculation results of integral cast-in-place piers and prefabricated segmental assembly piers, the concrete strength grade of piers and the prefabricated segment of precast joints with the same reinforcement as the integral cast-in-situ piers are established.Finite element model of precast jointed pier,Using the same load condition as the integral cast-in-place pier, the dry joint assembly pier and the glue joint assembly pier are loaded, the calculation results are analyzed, and the results are compared with those of the integral cast-in-place pier.By comparing the structural performance of different piers, a solid finite element model of precast pier with three wet joints is established, which has the same grade of concrete strength and reinforcement as the integral cast-in-place pier, but different age of wet joint section of pier.They are loaded under the same load condition as the whole cast-in-place pier, and the calculated results are analyzed, and the calculated results are compared with the monolithic cast-in-place piers.The calculation results of dry joint assembled piers and prefabricated segmental piers were compared and analyzed to compare the structural performance of prefabricated segmental piers with different connecting modes.The research of this paper is supported by Ningbo Bridge Technology Innovation team (2010-B 81003).
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441;U443.22

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