ZTH龙头拱桥V形刚构钢—混结合段模型试验研究

发布时间：2018-06-06 09:55

本文选题：V形刚构拱桥 + 钢-混结合段　；参考：《中南大学》2014年硕士论文

【摘要】：ZTH龙头拱桥是一座中承式曲线钢箱梁钢管混凝土V形刚构拱桥,跨径布置为2×30m+80m+2×30m。全桥共有4个钢-混结合段,两两对称。钢-混结合段的细部构造及受力状态非常复杂,全桥空间有限元分析很难考虑到钢-混结合段的构造细节。本文应用有限元分析和模型试验相结合的方法研究了ZTH龙头拱桥主拱钢-混结合段的受力性能。主要工作和成果如下： 1、在实桥全桥空间有限元分析和钢-混结合段局部精细有限元分析的基础上,确定了5个试验工况。 2、综合考虑各方面因素确定了试验模型的相似比为1：5,设计、制作了试验模型,完成了各试验工况的加载方案设计 3、模拟试验模型的加载工况,完成了试验模型的空间有限元分析,并与实桥钢-混结合段的有限元计算结果进行比较,证实了试验加载方案的正确性。 4、完成了4个最不利荷载工况和1个超载工况下的模型试验,试验实测结果同有限元分析结果吻合良好,钢-混结合段传力顺畅；5个试验工况模型均处于线弹性状态,钢-混结合段具有足够的承载能力,且有较大的裕量。本文的研究成果为ZTH龙头拱桥主拱钢-混结合段设计提供了依据,同时对其他同类桥梁的设计具有一定的参考价值。
[Abstract]:The ZTH bibcock arch bridge is a through curved steel box girder V-shaped rigid frame arch bridge with a span arrangement of 2 脳 30m 80m 2 脳 30m. There are 4 steel-mixed joint sections in the whole bridge, which are symmetrical. The detailed structure and stress state of the steel-mixed section are very complicated, so it is difficult to consider the structural details of the steel-mixing section in the finite element analysis of the whole bridge space. In this paper, finite element analysis and model test are used to study the mechanical behavior of the main arch steel-concrete section of ZTH arch bridge. The main work and results are as follows: 1. Based on the spatial finite element analysis of the whole bridge and the local fine finite element analysis of the steel-mixing section, five test conditions are determined. 2. Considering various factors, the similarity ratio of the test model is 1: 5. The test model is designed, the test model is made, and the loading scheme of each test condition is designed. 3. The spatial finite element analysis of the test model is completed by simulating the loading condition of the test model, and compared with the finite element calculation results of the steel-concrete section of the real bridge, the correctness of the test loading scheme is verified. 4. The model tests under four most unfavorable load conditions and one overload condition have been completed. The measured results are in good agreement with the finite element analysis results, and the transfer force of the steel-mixing joint section is smooth, and the five test condition models are all in linear elastic state. The steel-mixing section has enough bearing capacity and a large margin. The research results of this paper provide the basis for the design of the main arch steel-concrete joint section of ZTH arch bridge, and also have certain reference value for the design of other similar bridges.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U446;U448.22

【相似文献】