单箱多室波形钢腹板部分斜拉桥力学性能分析

发布时间：2018-04-13 09:35

本文选题：单箱多室波形钢腹板箱梁 + 矮塔斜拉桥　；参考：《郑州大学》2015年硕士论文

【摘要】：波形钢腹板部分斜拉桥同时具备一般矮塔斜拉桥和波形钢腹板PC组合梁桥的优点,增大了一般波形钢腹板PC组合梁桥的跨越能力,在腹板抗开裂性能、预应力体系设置、混凝土顶底板和钢腹板传力路径方面都有明显优势,应用广泛。目前对波形钢腹板部分斜拉桥研究较少,所研究箱梁多为单箱单室或单箱双室箱梁主梁,对于单箱多室箱主梁研究较少。本文以主跨188m单箱4室变截面波形钢腹板部分斜拉桥——朝阳沟大桥为依托工程,运用Midas/Civil和大型有限元软件Midas/FEA分别建立组合有限元模型,对其进行力学性能研究,研究结果可为同类桥梁的设计和施工提供参考。论文主要工作有:1.使用有限元软件Midas/Civil和Midas/FEA分别建立朝阳沟大桥梁单元模型和空间实体单元模型,该模型能准确模拟混凝土顶底板、波形钢腹板、斜拉索、预应力钢筋作用以及它们之间的连接;2.选择基于“未知荷载系数法”,计算朝阳沟大桥合理成桥状态并对成桥状态的合理性进行验证;确定朝阳沟大桥合理施工状态,计算获得了施工过程中斜拉索初拉力、施工预拱度、二次调索索力、施工过程中塔顶位移和主梁位移、箱梁顶底板最大应力等实现合理成桥状态的主要控制参数;3.进行朝阳沟大桥动力性能分析,了解该桥型的动态特性;开展朝阳沟大桥抗震动力时程响应分析,分析该桥型的抗震性能。
[Abstract]:The corrugated steel web partial cable-stayed bridge has the advantages of both the general low tower cable-stayed bridge and the corrugated steel web PC composite girder bridge, which increases the span ability of the general corrugated steel web PC composite girder bridge.Concrete top and bottom slab and steel web have obvious advantages in force transfer path and are widely used.At present, there are few researches on the corrugated steel web partial cable-stayed bridges. Most of the box girders studied are single-box, single-chamber or single-box double-chamber box girder, and the single-box multi-chamber box girder is less studied.In this paper, based on the main span of 188m single box and 4 room variable section steel web partial cable-stayed bridge-Chaoyang ditch Bridge, the combined finite element model is established by using Midas/Civil and the large finite element software Midas/FEA, and the mechanical properties of the bridge are studied.The results can provide reference for the design and construction of similar bridges.The main work of this paper is 1: 1.The finite element software Midas/Civil and Midas/FEA are used to establish the Chaoyang ditch large bridge element model and the spatial solid element model respectively. The model can accurately simulate the concrete roof and bottom slab, the corrugated steel web, the stay cable, the prestressed steel bar and the connection between them.Based on the "unknown load coefficient method", the reasonable state of Chaoyang ditch Bridge is calculated and the rationality of the completed state is verified, the reasonable construction state of Chaoyang ditch Bridge is determined, and the initial tension of cable in the construction process is calculated.The main control parameters, such as pre-arch, secondary cable force, tower top displacement and main beam displacement during construction, and maximum stress on top and bottom slab of box girder, are the main control parameters to realize the reasonable state of the bridge.Dynamic performance analysis of Chaoyang ditch Bridge is carried out to understand the dynamic characteristics of the bridge type, and the seismic dynamic time history response analysis of Chaoyang ditch Bridge is carried out to analyze the seismic performance of the bridge type.
【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;U448.27

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