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地下车库使用过程中可能会出现上覆土压力过载问题,进而造成工程质量缺陷或事故。对荆州某地下车库进行仿真模拟,研究了板—梁—柱系统的承载机理,分析了车库框架结构的荷载传递机制和构件受力机制,揭示了顶面压力对车库结构的影响规律,并给出了加固方案。试验结果显示:车库整体结构的应力分布与覆土压力大小、分布形式及柱混凝土材料性质等因素有关,梁柱节点是最容易受损的部位;车库结构柱钢筋的应力呈中间大、周边小的分布形式,在非均匀分布的覆土压力作用下,最大应力值有减小的趋势;结构梁钢筋和结构板钢筋的应力局部集中现象不明显,车库顶部荷载分布不均匀时,应力分布也不均匀。
Overground pressure overload may occur during use of the underground garage, resulting in quality defects or accidents. The simulation of an underground garage in Jingzhou was carried out. The bearing mechanism of the slab-beam-column system was studied. The load transfer mechanism and mechanical mechanism of the frame of the garage were analyzed. The influence of roof pressure on the garage structure was revealed. Out of the reinforcement program. The test results show that the stress distribution of the whole garage structure is related to the size and distribution of overburden pressure and the properties of column concrete. The beam-column joints are the most vulnerable parts. The stress of the steel bars in the garage column is large in the middle and small in the periphery Distribution, the maximum stress value tends to decrease under unevenly distributed overburden pressure. The local stress concentration is not obvious in the structural beam and structural steel, and the stress distribution is not uniform even when the load distribution in the top of the garage is uneven. .