某大型商业结构与地铁车辆段结构连接的分析研究

某大型商业结构位于地铁车辆段结构顶盖上部,属于地铁上盖物业。对该大型商业结构设计中遇到的问题进行分析研究,提出可行的解决方案。通过结构柱网的合理布置,使商业结构竖向构件与地铁竖向构件尽可能对齐。当商业结构的结构柱与下方地铁结构柱偏心较小时,将车辆段结构顶盖视为地基,商业结构柱采用独立基础,不考虑与下部车辆段结构顶盖共同受力。当商业结构柱与下方地铁结构柱偏心较大时,车辆段结构顶盖与商业结构柱结合位置采用叠合梁的受力模型,考虑与下部车辆段顶盖共同受力。采用ANSYS 15.0软件对不同的偏心情况进行力流分析研究,得出地铁顶盖考虑不同受力情况的偏心临界值。根据力流分析得到当偏心值小于1.5m时选用独立基础的结构模型,当偏心值大于1.5m时采用叠合梁的受力模型。竖向构件对叠合构件中的叠合面产生的水平剪切力将全部由箍筋承担。分析结果表明,商业结构及车辆段顶盖均能保证结构安全。

Analysis and research on the connection between the large-scale commercial structure and the structure of metro depot

A large-scale commercial structure is located in the upper cover part of the structural roof of the metro depot, which belongs to the metro upper cover property. The problems encountered in the design of the large-scale commercial structure were analyzed and studied, and feasible solutions were put forward. Through the reasonable arrangement of structural column grid, the vertical members of commercial structure and the metro structure were aligned as much as possible. When the structural column of commercial structure and the metro structural column below were relatively small, the roof of the depot structure was regarded as the foundation, and the commercial structural column adopted the independent foundation, and the joint force with the structural top cover of the lower depot was not considered. When the eccentricity between the commercial structure column and the metro structure column was large, the composite beam stress model was adopted for the joint position of the depot structure roof and the commercial structure column, considering the joint force with the lower depot roof. ANSYS 15.0 software was used to analyze the force flows under different eccentric conditions, and the critical value of eccentricity of metro roof was obtained considering different stress conditions. According to the force flow analysis, when the eccentricity was less than 1.5 m, the structure model of independent foundation was selected;when the eccentricity was greater than 1.5 m, the stress model of composite beam was adopted. The horizontal shear force produced by the vertical member on the superimposed surface of the composite member were borne by the stirrup. The analysis results show that both commercial structure and depot roof can ensure the structural safety.