钢筋混凝土双向受弯梁受剪承载力的计算方法探析

对于钢筋混凝土双向受弯梁斜截面受剪承载力的计算分析,一般是简化为按两个单向受弯梁的斜截面受剪承载力分别计算后再叠加的方法来确定。而对《混凝土结构设计规范》(GB50010-2002)中的双向受弯框架柱的计算方法,能否用来分析双向受弯梁的斜截面受剪承载力尚不清楚。基于已有的32根集中荷载作用下双向受弯梁的试验结果,本文采用上述两种方法对双向受弯梁的斜截面受剪承载力进行了对比分析,探讨了它们的适用性问题。研究结果表明,采用这两种方法计算分析双向受弯梁的斜截面受剪承载力所得结果误差较大且不安全,可以说是不适用的。

Discussion on analytical methods for shear capacity of reinforced concrete beams under biaxial bending

Usually,the shear capacity of reinforced concrete beams under biaxial bending for concentrated load acts,was reduced to two beams for gaining each shear capacity of diagonal plane,then piled them up for the result of biaxial bending member.And it is unknown whether the calculation formula of frame column under biaxial bending in the Code for Design of Concrete Structures(GB50010-2002) is suited to apply to calculate the biaxial bending beams.In this paper,two methods above were used to study biaxial bending beams for shear strength of inclined section with the 32 test beams,the results of the two calculation methods compared with the tests were analyzed,altogether the applicability was explored.The result of above research was indicated that those two calculation ways were not safe for biaxial bending beams,and not applicable for calculating the shear capacity.