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为了确定钢筋混凝土单箱多室箱梁在剪扭组合作用下的极限承载力,该文基于箱梁剪扭理论,提出了一种通过验算单箱多室箱梁每个板件的极限抗剪承载力来确定整个断面剪扭承载力的方法。笔者通过试验对该方法进行了验证,试验结果表明,采用该方法计算单箱多室箱梁的抗剪扭极限承载力是可行的,按此方法计算得到的单箱多室箱梁的抗剪扭极限承载力的安全储备系数可以达到2.54。该文为钢筋混凝土单箱多室箱梁在剪扭作用下极限荷载的确定提供了理论计算方法,利用该方法能较好的预测单箱多室箱梁在剪扭作用下的极限荷载。
In order to determine the ultimate bearing capacity of RC box single-box multi-chamber box girder under shear-torsion combination, based on the shear-torsion theory of box girder, Bearing capacity to determine the shear strength of the whole section of the method of bearing capacity. The author verifies the method through experiments. The experimental results show that it is feasible to calculate the ultimate shear capacity of single-box multi-chamber box girder by this method. According to this method, the shear resistance of single- The torsional ultimate capacity of the safety reserve factor can reach 2.54. This paper provides a theoretical calculation method for the determination of ultimate load of RC box single-box multi-chamber box girder under shearing and twisting action. The method can be used to predict the ultimate load of single box multi-chamber box girder under shear and torsion.