基于RA-STM模型深受弯构件受剪承载力计算  

Shear strength prediction for reinforced concrete deep flexural member using RA- STM model

作　　者：魏慧[1] 汪红 何婷[1] 吴涛[1] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]陕西建工第六建设集团有限公司,陕西西安710003

出　　处：《世界地震工程》2016年第2期113-120,共8页World Earthquake Engineering

基　　金：国家自然科学基金项目资助(51578072);陕西省科技统筹创新工程计划项目(2015KTZDSF03-04);西安市科学技术项目(CXY1512(6));中央高校基本业务费(310828163410;310828161006)

摘　　要：RA-STM模型是近年来学者提出的新型承载力分析模型。基于RA-STM模型计算理论,结合深受弯构件受力平衡方程、变形协调条件及混凝土本构模型,推导出基于RA-STM模型考虑混凝土软化效应的钢筋混凝土深受弯构件受剪承载力计算公式,采用MATLAB编制计算程序,完成了国内外271组钢筋混凝土深受弯构件受剪承载力试验结果与ACI318-08、GB50010-2010、CSA、EC2等现有规范计算结果及RA-STM模型预测结果的对比分析。研究表明:与现行规范计算结果相比,RA-STM模型因考虑混凝土软化效应预测结果更接近试验结果,且其具有明确的力学模型,能够合理反应深受弯构件受力机理。因此,RA-STM模型可以较准确预测深受弯构件的受剪承载力。RA-STM model as a new bearing capacity analysis model is proposed by scholars in recent year. Combining the equilbrium equation,deformation compatibity condition and concrete constitutive relation of deep flexural members, this paper proposed a calculation omfrula based on RA-STM model which considering the softening effect of concrete. Then a procedure was developed using MATLAB to realize the whole calculation process ,and complete the comparison in between the results of proposed model and current codes such as ACI318 -08,GB50010 -2010,CSA,EC2 with the test results of 271 deep flexural members. It is found that the calculated results of RA-STM model show good agreement with the test results by comparing with the results of current design codes. And the proposed model with definite shear trans- mission mechanism can reasonably reflect the failure mechanism of deep flexural members. As a result ,the RA-STM mod- el can accurately predict shear beating capacity of reinforced concrete deep flexural members.

关 键 词：钢筋混凝土 深受弯构件 RA-STM模型 软化效应 受剪承载力 

分 类 号：TU375.1[建筑科学—结构工程]