拉-压杆模型RPC梁抗剪承载力试验研究  

Shear bearing capacity study of high strength reinforced RPC beams based on strut-and-tie model

作　　者：金凌志[1] 张猛[1] 

机构地区：[1]广西岩土力学与工程重点实验室,桂林理工大学土木与建筑工程学院,广西桂林541004

出　　处：《广西大学学报（自然科学版）》2015年第5期1060-1067,共8页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金项目(51368013);广西重点实验基金项目(11-CX-04)

摘　　要：为了研究高强钢筋活性粉末混凝土无腹筋梁的抗剪承载力,进行不同剪跨比条件下HRB500级钢筋活性粉末混凝土无腹筋简支梁的结构试验,构建基于由桁架模型演化而来的拉—压杆模型高强钢筋活性粉末混凝土无腹筋梁抗剪承载力计算公式,并引入拱体效应系数进行修正。研究结果表明:由于HRB500级钢筋和活性粉末混凝土的材料强度更高,试验梁的延性更好,其拉—压杆效应更加明显;将公式的计算值与试验值进行比对分析,其吻合程度较好,说明所推导的计算公式具有一定的实用性,可为同类研究提供参考。In order to study the shear bearing capacity of high strength reinforced reactive powder concrete （RPC） beams without stirrups, according to the structural experiment of HRB500 rein- forced RPC beams without stirrups under different shear span ratio, the calculation formula of the shear bearing capacity of the beams was deduced based on the strut-and-tie model evolving from the truss model, and the arch effect coefficient was quoted to amend this formula. The results show that the ductility of the test beams is better, and their strut-and-tie effect is more apparent, because the HRBS00 reinforcement and RPC have higher material strength. The calculated results are corre- sponding with the test results well, which indicates that the deduced formula has some practical value, and it can be referenced in similar researches.

关 键 词：剪跨比 活性粉末混凝土 拉—压杆模型 抗剪承载力 拱体效应系数 

分 类 号：TU375.1[建筑科学—结构工程]