大跨度钢—混组合梁桥施工监控方法及问题分析

发布时间：2018-05-21 20:43

本文选题：组合连续梁 + 有限元分析　；参考：《重庆交通大学》2015年硕士论文

【摘要】：二十一世纪以来,高速公路迅速发展,到2015年底我国公路总里程数将达到450万公里,国家高速公路网将基本建立。港珠澳大桥的建设,是中国桥梁史上非常重要的工程,具有重要的现实意义。港珠澳大桥浅水区非通航孔桥是港珠澳大桥整体建设的一部分,其主梁部分采用的是85m钢-混组合连续梁,均为5~6孔为一联。组合连续梁桥从施工到成桥状态整个过程较为复杂,在成桥的过程中,组合梁的状态发生了从简支到连续的体系转换。本文针对此桥施工监控进行探索,利用MIDAS/Civil有限元分析软件建立了相关的理论分析模型,对其施工监控中出现问题的原因进行分析研究,具有重要的理论和实际意义。研究的主要内容和成果如下:①通过有限元桥梁软件MIDAS/Civil建立钢—混组合连续箱梁桥有限元模型,精确还原及分析钢—混组合连续梁桥在钢主梁与组合梁预制场存放、大节段整孔吊装、简支变连续体系转换、顶升与回落以及预应力张拉的施工过程,并得知了各个施工步骤和施工工况下梁体结构线形变化及内力分布情况。②根据施工监控的重要性,应用MIDAS/Civil软件提取相应的数据,为施工监控工作提供了理论支持。③利用施工监控现场实测数据,与模型所提理论数据相比较,发觉两者间的规律性,探求其不同的特征,以便发现问题。④提出施工监控过程中发现的问题,通过模型的理论计算,发现出现问题的原因,并寻求解决办法。对改进意见进行合理化分析。⑤根据施工监控的具体实施方法,提出施工监控的优化方案,为今后的施工监控工作提供一定的理论依据。
[Abstract]:Since the 21 century, the highway has developed rapidly. By the end of 2015, the total mileage of highway in China will reach 4.5 million kilometers, and the national highway network will be basically established. The construction of Hong Kong-Zhuhai-Macao Bridge is a very important project in the history of Chinese bridge. The non-navigable bridge in shallow water area of HongKong-Zhuhai-Macao Bridge is a part of the whole construction of HongKong-Zhuhai-Macao Bridge. The whole process from construction to completion of composite continuous beam bridge is more complicated. In the process of bridge completion, the state of composite beam has changed from simple support to continuous system. This paper probes into the construction monitoring of the bridge, establishes the relevant theoretical analysis model by using the MIDAS/Civil finite element analysis software, and analyzes and studies the causes of the problems in the construction monitoring, which has important theoretical and practical significance. The main contents and results of the study are as follows: 1. The finite element model of steel-concrete continuous box girder bridge is established by using the finite element bridge software MIDAS/Civil, and the storage of steel-concrete composite continuous beam bridge in the precast site of steel main girder and composite beam is accurately reduced and analyzed. The construction process of large segment whole hole hoisting, conversion of simple support to continuous system, rise and fall and prestress tensioning, According to the importance of construction monitoring and control, the corresponding data are extracted by MIDAS/Civil software. This paper provides theoretical support for the construction monitoring work. 3. Comparing with the theoretical data proposed by the model, the author finds out the regularity between the two methods and explores their different characteristics. In order to find out the problems found in the process of construction monitoring and control, through the theoretical calculation of the model, to find the causes of the problems, and to find solutions. According to the concrete implementation method of construction monitoring, the optimization scheme of construction monitoring is put forward, which provides a certain theoretical basis for the construction monitoring work in the future.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4

【共引文献】