下部受荷钢筋混凝土深梁的抗剪强度

本文给出了24个下部受荷约束深梁与简支深梁的试验及非线性有限元电算结果。通过分析,探讨了上下部受荷深梁受力机理的异同点,基本上查明了下部受荷深梁的抗剪性能。提出了此类深梁抗剪强度的计算公式和竖向腹筋的计算方法;斜截面抗裂度计算公式和约束深梁的弯剪界限配筋率公式。

Shear Strength of R.C. Deep Beams Loaded at the Bottom Edge

In this paper,the test results of 24 reinforced concrete deep beams and the computer analysis of nonlinear finite elements of 8 R.C.deeP beams,both loaded at bottom edges,are reported.The differences and similarties of the mechanism of force transfer between R.C.deep beam's loaded at the top edges and those loaded at the bottom edges are discusssed.The shear behaviours of these deep beams have.been basically obtained.Formulas for calculating its shear strength methods for deter mi ng the vertical web reinforcement and formulas for estimating the load bearing capacity at diagonal cracking are presented.Finally,the critical steel ratio for bending and shear collapse of restrained deep beams is given.