对柱下独立基础抗冲切与抗剪承载力计算的分析与建议

Analysis and Suggestion on the Calculation of Punching Shear Capacity and Shear Capacity of Independent Column Foundation

针对GB50007-2011《建筑地基基础设计规范》中柱下独立基础计算的相关规定,通过独立基础抗冲切承载力和抗剪承载力的计算,对独立基础抗冲切承载力与抗剪承载力比值关系进行了分析和研究,结果表明:对柱下独立基础,无论冲切破坏锥体落在基础底面以内还是以外,都应验算柱与基础交接处的抗冲切承载力和抗剪承载力。结论对独立基础设计有重要的指导作用。

According to the relevant calculation specification of independent column foundation in the code of GB 50007--2011 ＂Code for Design o fBuilding Foundation＂, the punching shear cap acity and the shear capacity of the independent foundation were calculated in this study followed by analysis and research of the ratio of the punching shear capacity to the shear capacity. The results showed that for independent column foundation, no matter the punching failure cone falls in or outside the base, the punching shear capacity and shear capacity of the column and foundation junction should be checked with calculation. This conclusion offers an important guide to the design of independent foundation.