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混凝土U形薄壁梁在国内城市轨道交通中得到广泛应用,但是关于该类梁在纯扭或弯扭耦合作用下的翘曲扭转效应及其承载力计算的研究相对滞后。为此,基于6个钢筋混凝土U形薄壁纯扭构件和弯扭复合作用构件的试验结果,利用Vlasov开口薄壁结构理论,并将截面弯矩和翘曲弯矩按刚度加以分配,提出了钢筋混凝土U形薄壁梁纯扭和弯扭承载力计算模型。对比了钢筋混凝土U形薄壁梁纯扭及弯扭承载力的计算结果和试验结果,两者吻合较好。
Concrete U-shaped thin-walled beams are widely used in urban rail transit in China, but the research on warping torsional effect and bearing capacity calculation of this kind of beam under pure torsional or torsional-torsional coupling is lagging behind. Based on the test results of six reinforced concrete members with torsion and torsion and torsion-torsion, six thin-walled torsionally-torsional members with torsion and torsion are used to calculate the stiffness of the torsional moment and the bending moment. The reinforced concrete Calculation Model of Pure Twist and Flexural Torsion Strength of U - Shaped Thin - Walled Beams. Comparing the calculation results and the test results of pure torsion and torsional torsional bearing capacity of U-shaped thin-walled reinforced concrete beam, the two agree well with each other.