大跨度预应力混凝土连续刚构桥施工仿真与控制分析

发布时间：2018-06-16 08:20

本文选题：连续刚构 + 施工仿真　；参考：《合肥工业大学》2015年硕士论文

【摘要】：预应力混凝土连续刚构桥由于其良好的受力特点以及相对成熟的施工技术成为桥梁设计者推荐的主要桥型之一,而在预应力混凝土连续刚构桥悬臂施工过程中,已建成梁段的线形在后期施工中是难以调整的。因此为了保证桥梁的顺利合龙及成桥线形满足设计要求,同时成桥内力控制在设计容许范围内,必须对桥梁施工过程进行控制。因此对连续刚构桥施工阶段进行仿真与控制的分析显得极为重要。该文以芜湖市弋江桥改建工程为依托,采用桥梁专业软件MIDAS CIVIL进行仿真模拟分析,通过模拟施工阶段对其应力、线形以及关键施工技术进行分析研究,主要完成了以下几个方面的内容：首先讨论了几种常用施工过程模拟方法,并选取合适的模拟方法；对仿真参数进行了敏感性分析,得到施工过程中需要重点把控敏感性参数,其次介绍了桥梁施工过程中控制误差分析以及参数修正理论,并以此为依据建立合适的监控系统对桥梁进行应力和线形的施工监控,根据立模标高控制原理给出了合适的预拱度；然后简述了桥梁稳定性理论,并对桥梁施工最大悬臂阶段进行稳定性分析,得出了影响最大悬臂稳定性的主要荷载；最后讨论了桥梁施工合龙阶段的顶推技术,包括顶推施工工艺和控制原则,并结合实例进行验证。
[Abstract]:Prestressed concrete continuous rigid frame bridge has become one of the main bridge types recommended by bridge designers due to its good mechanical characteristics and relatively mature construction technology. However, in the process of cantilever construction of prestressed concrete continuous rigid frame bridge, The alignment of the completed beam section is difficult to adjust in the later stage of construction. Therefore, in order to ensure the smooth closure of the bridge and the alignment of the bridge to meet the design requirements, at the same time, the control of the internal force of the completed bridge is within the allowable range of the design, so the construction process of the bridge must be controlled. Therefore, it is very important to analyze the simulation and control of continuous rigid frame bridge construction. Based on the reconstruction project of Yijiang Bridge in Wuhu City, this paper uses the bridge professional software Midas CIVIL to simulate and analyze its stress, alignment and key construction technology. The main contents are as follows: firstly, several common construction process simulation methods are discussed, and appropriate simulation methods are selected, the sensitivity of simulation parameters is analyzed, and the sensitivity parameters need to be controlled in the construction process are obtained. Secondly, it introduces the analysis of control error and the theory of parameter correction in the process of bridge construction, based on which a suitable monitoring system is established to monitor the stress and alignment of the bridge. According to the principle of vertical formwork elevation control, the appropriate pre-arch degree is given, and then the theory of bridge stability is briefly described, and the stability analysis of the maximum cantilever stage of bridge construction is carried out, and the main loads affecting the maximum cantilever stability are obtained. At last, the paper discusses the jacking technology in closing stage of bridge construction, including the pushing construction technology and control principle, and verifies it with an example.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4

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