高寒地区大跨连续刚构桥施工控制技术研究

发布时间：2018-03-10 18:12

本文选题：连续刚构桥　切入点：温度荷载　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着经济的发展，桥梁作为现代生活中重要的交通生命线工程，其跨径以及施工要求也在不断提高。在众多桥型中，连续刚构桥是使用较多的一种桥型，，因为连续刚构桥不仅跨径较大，而且施工便利、技术较为成熟。近年来，随着连续刚构桥施工技术的不断进步，悬臂浇筑成为在实际工程中使用最为广泛的一种连续刚构桥施工方法。在悬臂施工过程中，由于桥梁结构存在由静定结构转变为超静定结构的过程，因此在施工过程中要注意对桥梁线性、内力以及挠度等因素进行施工过程监控，以满足桥梁结构的要求。随着连续刚构桥跨径的不断增大，温度变化对桥梁的线形、内力以及挠度的影响越来越重要，尤其是日照辐射以及骤降温差的变化对桥梁结构的影响都是较大的。对于悬臂浇筑的大跨径连续刚构桥来说，合拢时的温度变化影响对其是极为重要的。基于上述原因，本论文以黑城河特大桥为背景，采用MIDAS/CIVIL软件对其进行仿真分析，本文的主要研究内容如下：（1）通过MIDAS/CIVIL软件对黑城河特大桥进行建模分析，首先对其进行静力分析，得到不同施工工况下其应力应变情况。（2）黑城河特大桥由于地处青海高寒地区，施工过程中的温度变化对其施工进度的影响较大，在本文中通过MIDAS/CIVIL软件对黑城河特大桥的合拢温度进行计算分析。（3）对黑城河特大桥进行实际监测，并对监测数据进行分析，验证监控成果的精确度。
[Abstract]:With the development of economy, bridge, as an important traffic lifeline project in modern life, its span and construction requirements are also increasing. Among many bridge types, continuous rigid frame bridge is a kind of bridge used more frequently. Because continuous rigid frame bridge not only has a long span, but also has convenient construction and mature technology. In recent years, with the continuous progress of construction technology of continuous rigid frame bridge, Cantilever pouring has become the most widely used construction method of continuous rigid frame bridge in practical engineering. In the cantilever construction process, the bridge structure is changed from statically indeterminate structure to statically indeterminate structure. Therefore, in order to meet the requirements of bridge structure, it is necessary to monitor the construction process of the factors of bridge linearity, internal force and deflection. With the increasing span of continuous rigid frame bridge, the influence of temperature change on the alignment, internal force and deflection of the bridge becomes more and more important. Especially, the influence of sunshine radiation and temperature difference of sudden drop on bridge structure is great. For cantilever cast long-span continuous rigid frame bridge, the influence of temperature change during closure is very important. Based on the above reasons, this paper takes the Heicheng River Bridge as the background, uses the MIDAS/CIVIL software to carry on the simulation analysis to it, the main research content of this paper is as follows:. 1) the modeling and analysis of Heicheng River Bridge is carried out by MIDAS/CIVIL software. Firstly, the static analysis of the bridge is carried out, and the stress and strain of the bridge under different construction conditions are obtained. The Heicheng River Bridge is located in the alpine region of Qinghai Province. The temperature change during construction has a great influence on the construction progress. In this paper, the closure temperature of the Heicheng River Bridge is calculated and analyzed by MIDAS/CIVIL software. The actual monitoring of the Heicheng River Bridge is carried out, and the monitoring data are analyzed to verify the accuracy of the monitoring results.
【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】：U445.4;U448.23

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