依据朝阳220kV装配式变电站的工程实例，在考虑锚栓参与抗剪的条件下，从理论上分析了剪力作用下钢柱脚节点的合理破坏模式.通过计算获得钢柱脚在合理的破坏模式下抗剪能力的理论值，并通过有限元软件建立钢柱脚有限元模型.利用有限元软件分析柱脚在垂直力和水平力作用下的抗剪能力，将所获得的结果与规范中规定的柱脚抗剪承载力对比分析.通过研究发现柱脚锚栓可以提供的抗剪能力相当可观，而且钢柱脚的实际抗剪能力较规范规定的柱脚抗剪能力高出较多.研究成果表明，在工程实际中应提高柱脚抗剪承载力设计值的极限，这样可以在实际工程中避免或者减少抗剪键的设置，起到方便施工，节约成本的效果.
Abstract
On the basis of Chaoyang 220kV prefabricated substation project, considering the anchor bolt in shear conditions, it theoretically analyzes the reasonable failure mode of steel column base joints under shear. The shear capacity of steel column base theory getted in failure mode under reasonable value by calculation, and establishing the finite element model of steel column base with the finite element software. Analyzing the shear capacity of column base in vertical force and horizontal force by using finite element software, and comparatively analyzing bearing capacity of shear provisions of the results that obtained with the standard in the column. It's found that the shear capacity that the anchor bolt can provide is considerable, and the actual shear capacity of steel column is much higher than the normative column base shear capacity. The research results show that we should improve the limit of the design values of shear bearing capacity of column, which can avoid or reduce the shear key settings in practical engineering to facilitate the construction and cost saving.
关键词
钢柱脚 /
锚栓 /
抗剪键 /
承载力
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Key words
Steel column base /
Anchor bolt /
Shear bond length /
Bearing capacity
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