圆形、环形截面钢筋混凝土构件抗剪承载力的试验研究

Experimental Research on Shear Strength of Reinforced Concrete Beams with Circular and Ring Section

本文通过最近进行的６根钢筋混凝土圆形截面梁和２根预应力混凝土圆形截面梁的试验研究，探讨了剪跨比、截面特征、纵向钢筋配筋率、配箍率以及轴向压力对梁抗剪强度的影响，在此基础上，建立了圆形截面受弯构件抗剪严载力的计算公式。根据与圆形截面构件类似的分析，并结合过去我们完成的１４根环形截面梁的试验结果和参考国外的试验数据，形成了环形截面构件抗剪承载力的计算公式。本文建议的这两个公式补充了现行规范的空缺，可分别用于圆形截面梁柱和环形截面梁的工程设计。

By analyzing the test data of six reinforced concre circular beams and two prestressed concret circular beams,the factors influencing the shear strength of circular beams,i.e.the shear span ratio,the characteristics of cross section, the ratio of longitudinal reinforcement',the ratio of stirrups and the axial compression ratio have been studied.Based on the analysis and the test data,a formula for calculating the shear bearing capacity of circular members is derived.Using similar method,the formula for predicting the shear strength of members with ring section is also put forward.