摘要
抗剪承载力是钢管混凝土在复杂受力设计时需要考虑的关键问题之一,但是目前实心和空心钢管混凝土的抗剪承载力公式不连续.为了建立统一的计算方法,首先建立了钢管混凝土在纯剪作用下的有限元模型并进行了试验验证,在此基础上分析了空心率对钢管混凝土抗剪承载力的影响规律.基于极限平衡方法推导了实空钢管混凝土在纯剪下的承载力理论公式,并结合有限元对理论公式进行了参数标定.最终给出了实空心钢管混凝土完全统一的抗剪承载力计算公式,并收集了相关试验数据对公式进行验证,证明了统一公式的有效性.该工作将为实空心钢管混凝土的统一设计提供参考.
The shear bearing capacity is one of the key issue to be considered in the design of concrete-filled steel tubular concrete （CFST）. Unfortunately, the formula of shear capacity of solid and hollow CFST is not continuous. In order to build a unified and continuous calculation formula, a finite element model of CFST under pure shear load is established which also be verified by test results. Then, the influence of hollow ratio of CFST on shear capacity are studied. Based on the limit equilibrium method, the bearing capacity calculation formula of hollow and solid CFST under the pure shear are deduced, which has calibrated by finite element analysis results. Finally, a unified shear bearing capacity calculation formula for solid and hollow CFST is given, which is validated through comparison with experimental results. This work will provide a reference for the unified design of solid and hollow CFST.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2017年第6期829-835,共7页
Engineering Journal of Wuhan University
基金
湖北省自然科学基金项目(编号:2015CFB171)
国家自然科学基金项目(编号:51508425)
关键词
钢管混凝土
实心和空心
抗剪承载力
统一公式
concrete-filled steel tube （CFST）
solid and hollow
shear bearing capacity
unified formula
