钢管混凝土拱肋受力性能及节段模型试验研究

【作者】 成尚锋；

【导师】 邵旭东；

【作者基本信息】 湖南大学 ， 桥梁与隧道工程， 2003， 硕士

【摘要】 本文以湖南省益阳茅草街大桥为工程背景，进行了茅草街大桥主拱圈钢管混凝土拱肋拱顶1：5节段模型试验。试验模拟大桥的实际施工过程，得到了在各种荷载工况下拱顶节段钢管混凝土拱肋的应力分布。在完成静力加载工况后，对模型进行了一年的持荷观测，实测钢管混凝土徐变对结构应力重分布的影响。 全文共分四章，第一章论述了钢管混凝土及其在拱桥中的应用和发展，国内外对钢管混凝土受力性能研究的现状，提出了本文的研究内容。第二章介绍了模型试验的设计、制作和测试过程。第三章先对钢管混凝土拱桥的结构静力受力性能作了分析，随后用平面和空间有限元计算程序对模型作理论计算，并与静力试验测试值进行对比分析，得出一些规律性结论。第四章在论述混凝土的徐变理论基础上，推导出了钢管混凝土徐变应变的理论计算公式，并编制了钢管混凝土拱桥徐变分析的程序，将徐变试验观测结果和程序计算值进行对比分析，得出钢管混凝土徐变的一些基本规律。最后是结论，总结全文，提出了一些建设性的意见，并指出以后还需完善之处。 本文以试验为基础，理论分析为手段，为茅草街大桥的设计与计算提供依据，其结论也为同类型桥梁结构的设计研究提供借鉴。更多还原

【Abstract】 Presented in this thesis is a model test of the arch ribs segment with concrete filled steel tube(CFST) of Maocaojie Bridge, which is located in the Yiyang of the Hunan Province and provides the engineering base for the test. The model scale is 1/5. The distribution of the stress at the top section of arch ribs in different load cases is obtained by simulating the construction procedure. Moreover, the time-dependent stress in ribs due to the creep also has been measured for about one year since the static experiment case was over.This thesis is divided into four chapters. In chapter one, the CFST property and its application and development in bridge construction are reviewed. The status of the mechanical capability study at home and abroad on CFST are reviewed too. Then this research is outlined. In chapter two, the test procedure is introduced. In chapter three, the static load performance of the CFST arch bridge is firstly introduced. Then simulate the model with plane and space finite element methods to find the theoretical values, which are compared with the measured results. Some rules are obtained by the comparison. In chapter four, on the bases of the analyzing of the theory of concrete creep, a program for creep analysis of CFST arch bridge is compiled, The program results are compared with the experimental data, which proved the programming procedure is correct and finding some creep rules of CFST. At the end of the thesis, conclusion is drawn and some constructive advices are put forward, and some aspects to be consummated are pointed out.Based on the model test, analyzed in finite element program, the thesis gives credible data to the design of this bridge and the model test of the same type bridge,更多还原