车辆移动荷载下地下车库结构响应分析

发布时间：2018-08-28 09:13

【摘要】：结合实际工程案例利用ABAQUS有限元软件建立了移动车辆荷载作用下地下车库结构考虑实际配筋和混凝土损伤塑性模型的三维有限元模型;并将车辆移动荷载等效为移动的静力荷载作用于结构板面上,对结构的板、梁在荷载作用下裂缝发生发展的变化规律进行了研究。分析结果表明:移动车辆荷载在行驶速度缓慢时,整个加载于结构上的车辆荷载相当于多个静荷载作用于轮胎和结构的接触面上,车辆荷载的移动通过在加载平面内矢量运动控制;车辆前轮和后轮的作用远大于中间轮胎的作用。从模型分析结合梁、板实际裂缝图可以看出荷载是造成框架结构产生裂缝的主要原因,且为实际工程裂缝发生的机理以及发生的位置提供了可靠地理论依据,对后期的结构检测、评估以及加固具有较好的工程指导意义。
[Abstract]:A three-dimensional finite element model of underground garage structure considering actual reinforcement and concrete damage plastic model under moving vehicle load is established by using ABAQUS finite element software combined with practical engineering cases. The moving load of the vehicle is equivalent to the moving static load on the slab of the structure, and the variation of the crack in the slab and beam under the load is studied. The results show that when the moving vehicle load is slow, the whole vehicle load on the structure is equivalent to several static loads acting on the contact surface of the tire and the structure. The movement of vehicle load is controlled by vector motion in the loading plane, and the effect of the front and rear wheels is much greater than that of the intermediate tire. From the analysis of the model and the actual crack diagram of the slab, it can be seen that the load is the main cause of the cracks in the frame structure, and it provides a reliable theoretical basis for the occurrence mechanism and location of the cracks in practical engineering. It has good engineering guidance significance for the later stage of structure detection, evaluation and reinforcement.
【作者单位】：后勤工程学院军事工程管理系;重庆市设计院;
【基金】：重庆市建设科技计划(城科字2014年09-2号)资助
【分类号】：TU93

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