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《建筑地基基础设计规范》(GB 50007—2011)第8.4.11条规定:梁板式筏基底板厚度应满足受冲切承载力、受剪切承载力的要求。基于该规范第8.4.12条,通过详细的推导和计算得出:对于梁板式筏基,其底板厚度在满足基本构造要求下由受剪切承载力控制,受冲切承载力不起控制作用。工程实例也证明了此结论。因此,结构设计时可只根据受剪切承载力计算确定梁板式筏基底板厚度。
Article 8.4.11 of “Code for Design of Foundation of Building Foundation” (GB 50007-2011) stipulates that the thickness of slab raft base plate shall meet the requirements of punching load capacity and shear capacity. Based on Article 8.4.12 of the code, through detailed derivation and calculation, it can be concluded that for slab rafts, the thickness of the floor slab is controlled by the shear bearing capacity under the basic structural requirements and can not be controlled by the cutting load capacity . The project also proves this conclusion. Therefore, the design of the structure can only be calculated according to the shear bearing capacity to determine the beam plate raft base thickness.