金水沟大桥桥型方案比选研究

发布时间：2018-07-02 08:31

本文选题：桥梁方案设计 + 预应力混凝土连续刚构桥　；参考：《长安大学》2014年硕士论文

【摘要】：本文以108国道合阳过境公路金水沟大桥的桥型方案比选为研究对象，，从桥位选择、桥型方案拟定、上下部主要结构尺寸拟定、结构静动力分析、施工可行性及工程造价等方面进行了综合比选，初步确定了合理可行的桥型方案。首先，根据金水沟桥位处的地形、地质、水文等资料拟定了五种桥型方案。分别为：大跨径预应力混凝土连续刚构桥(不同跨径主桥和引桥组合)、预应力混凝土T梁桥。其次，采用桥梁计算软件进行了主桥承载能力强度验算和正常使用应力验算，计算结果表明结构受力满足规范要求；同时对连续刚构桥进行了动力分析，给出了该种桥型的6～10阶基频及对应的振型，根据动力分析模型及地震动输入，对连续刚构桥进行了E1、E2阶段各个控制截面的内力及位移计算。计算结果表明均能满足抗震规范要求。最后，从技术难度及可行性、施工及养护难易程度、工程造价等方面进行了五种桥型方案的综合比较，初步确定方案二连续刚构桥为推荐桥型方案。本文研究成果已应用于指导实际工程，为该桥的初步设计和施工图设计提供了主要依据。
[Abstract]:In this paper, the bridge scheme of Jinshuigou Bridge on Heyang Transit Highway of 108 National Highway is chosen as the object of study. The selection of bridge location, the formulation of bridge scheme, the determination of main structural dimensions of upper and lower parts, and the static and dynamic analysis of the structure are presented in this paper. The feasibility of construction and project cost are compared and selected, and a reasonable and feasible bridge scheme is preliminarily determined. Firstly, according to the topographic, geological and hydrological data of the Jinshuigou bridge, five bridge schemes are proposed. They are: long span prestressed concrete continuous rigid frame bridge (different span main bridge and approach bridge combination), prestressed concrete T beam bridge. Secondly, the bridge calculation software is used to check the bearing capacity strength of the main bridge and the normal use stress. The calculation results show that the structural force meets the requirements of the code, and the dynamic analysis of the continuous rigid frame bridge is also carried out. The 6 ~ (10) order fundamental frequency and the corresponding mode of the bridge are given. According to the dynamic analysis model and the input of ground motion, the internal forces and displacements of each control section of the continuous rigid frame bridge in E _ 1 / E _ 2 stage are calculated. The results show that it can meet the requirements of seismic code. Finally, from the aspects of technical difficulty and feasibility, construction and maintenance difficulty, engineering cost and so on, this paper makes a comprehensive comparison of five kinds of bridge schemes, and preliminarily determines the second continuous rigid frame bridge as the recommended bridge scheme. The research results in this paper have been applied to guide the practical engineering and provide the main basis for the preliminary design and construction drawing design of the bridge.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.5

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