高架桥梁荷载下地铁车站结构受力性状与整体稳定性研究

发布时间：2018-09-03 16:35

【摘要】：目前地铁车站作为上部高架桥梁箱型基础的案例并不多见,国内外对“站桥合一”结构体系的研究大多是抗震方面,而“站桥合一”结构体系的受力与稳定性方面研究较少。针对这一现状,文章基于厦门市地铁T型换乘车站(吕厝站)与市政高架桥梁合建工程,通过建立其有限元分析模型,对高架桥梁荷载下的地铁车站结构的受力和稳定性方面进行了研究,本文的主要内容如下:1、根据现场施工情况以及相关参数,利用Midas软件建立地铁车站二维模型得出车站顶板位置和侧墙位置的最不利点;并结合现行规范,利用车站最不利点位置所得到的结果对车站顶板和侧墙的稳定性进行了理论分析。2、根据实际工程资料,基于有限元软件ABAQUS建立“站桥合一”结构体系的二维平面应变模型,分别考虑在车站结构底部有桩和无桩两种工况下,计算了地铁车站结构受力性状,土体沉降,桩侧摩阻力分布规律等,并对比分析了这两种工况下车站模型内力,位移等的不同。3、基于ABAQUS有限元软件,建立“站桥合一”结构体系三维空间模型,对高架桥梁荷载下的地铁车站土体位移、各层板的内力、以及车站底部桩基位移等进行了分析,并与车站底部无桩工况下作对比分析。4、对二维模型和三维模型,在后处理中通过输出最大主应力值,得到地下结构容易受拉破坏区域,这对实际工程中地下结构配筋设计有重要的指导意义。
[Abstract]:At present, there are few cases of subway station as the box foundation of the upper elevated bridge. Most of the researches on the structural system of "the integration of station and bridge" are aseismic, while the research on the stress and stability of the "station and bridge in one" structure system is less. In view of this situation, based on the joint construction of T type transfer station (Lv Cuo Station) and municipal elevated bridge in Xiamen City, the finite element analysis model is established. The stress and stability of subway station structure under elevated bridge load are studied. The main contents of this paper are as follows: 1. According to the construction situation and related parameters, Using Midas software to establish a two-dimensional model of subway station to obtain the most disadvantageous points of the position of the roof and side wall of the station, and combined with the current code, The stability of the roof and side wall of the station is theoretically analyzed by using the results obtained from the position of the most disadvantageous point of the station. According to the actual engineering data, the two-dimensional plane strain model of the "station and bridge in one" structure system is established based on the finite element software ABAQUS. Under the conditions of pile and no pile at the bottom of the station structure, the stress characteristics, soil settlement, friction distribution of pile side and so on are calculated, and the internal forces of the station model are compared and analyzed. Based on the finite element software of ABAQUS, the three-dimensional spatial model of "station and bridge in one" structure system is established. The displacement of soil mass, the internal force of each layer plate and the displacement of pile foundation at the bottom of the station are analyzed under the load of elevated bridge. And compared with the bottom of the station under the condition of no pile. 4, for the two-dimensional model and the three-dimensional model, through the output of the maximum principal stress value in the post-processing, the area where the underground structure is vulnerable to tensile damage is obtained. This is of great significance to the design of reinforcement for underground structures in practical engineering.
【学位授予单位】：华东交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U231.4;TU93

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