计算长度的取值正确与否，将直接影响到支承加劲肋的稳定性验算。
Whether correct or not this will affect the calculation of the overall stability of bearing stiffeners directly.
主梁支承着工字梁的横向肋。
现行钢结构设计规范(GB50017 - 2003)规定梁的支承加劲肋计算长度取腹板高度。
Effective length of bearing stiffeners of steel girders has been taken as the web depth in the current Code for design of steel structures (GB50017-2003).
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