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通过对钢筋砼约束梁剪扭受力机理探讨及对三组共21根梁的试验结果分析,认为约束梁的剪扭相关强度比同条件简支梁低,现行规范(GBJ10—89)关于剪扭强度计算对约束梁偏不安全,对此给出了适合不同弯矩比n的剪扭强度计算公式.
Through the analysis of the mechanical mechanism of shear-twist for the restrained beams of the reinforced concrete and analysis of the experimental results of the three groups of 21 beams, it is considered that the shear-twist strength of the constrained beam is lower than that of the simply-supported beam with the same conditions. The current specification (GBJ 10-89) is about shearing. The calculation of torsional strength is not safe for the restrained beam, and the formula of shear torsion strength suitable for different bending moment ratios n is given.