钢筋混凝土牛腿中水平钢筋的作用及设计方法

Bchavior and Design of the Horizontal Steel Reinforcementin Reinforeed Concrete Corbels

在理论和试验研究的基础上,本文分析了在竖向力和反复水平力共同作用下钢筋混凝土牛腿中水平钢筋(包括水平主筋和水平箍筋)的作用,讨论了水平钢筋对牛腿的破坏特征、承载能力及延性的影响,提出了合理的配筋计算和确定最小配筋率的方法。利用该方法设计牛腿配筋,可减小箍筋用量。方便施工,且计算结果与试验值符合较好。

Based on the theoretical analysis and experiment,the effect of horizontal reinforcement in the corbies,including main steel bars and stirrups,is studied under the combined action of vertical and repeated reversed horizontal loading.The effect of the horizontal reinforcement on the carring capacity,ductility and the failure characteristic of the corbels has been analysed.In addition,the rational calculating approach of reinforcement and the method to determine the minimum steel ratio of main reinforcement and stirrup in corbels have been pressented.The method for designing the corbels suggested in this paper can effectively reduce the steel consumption and the calculating values arc quite close to the test data.