摘要
为建立CFRP(碳纤维增强复合材料)加固混凝土复合受扭构件的恢复力模型,完成了一组CFRP加固混凝土柱在低周反复荷载作用下的复合受扭试验。考虑了混凝土强度、CFRP加固方式、箍筋配筋率对其滞回特征的影响。在此基础上,通过对试验数据的分析,确定扭矩-扭率骨架曲线特征点的计算公式,提出了反复加载下卸载刚度和强度退化率的确定办法,并建立了CFRP加固混凝土复合受扭构件的扭矩-扭率恢复力模型。按此模型得到的计算曲线与实验曲线吻合度较好,表明该恢复力模型可用于CFRP加固混凝土复合受扭构件的非线性地震反应分析。
In order to establish the resilience model of CFRP-strengthened concrete composite torsion members,a group of composite torsion tests of CFRP-strengthened concrete columns under low-cycle repeated loads were completed.The influence of concrete strength,CFRP reinforcement method and stirrup reinforcement ratio on their hysteretic characteristics was considered in the test.On the basis of the test,the calculation formula of the characteristic points of the torque-torsion rate skeleton curve is determined through the analysis of the test data,and the method of determining the unloading stiffness and strength degradation rate under repeated loading is proposed,and the torque-torque resilience model of CFRP reinforced concrete composite torsion member is established.The calculated curves based on this model analysis are in good agreement with the experimental curves,indicating that the resilience model can be used for the nonlinear seismic response analysis of CFRP-strengthened concrete composite torsion members.
作者
隽蓉蓉
邵永健
严舒云
JUAN Rongrong;SHAO Yongjian;YAN Shuyun(School of Civil Engineering,SUST,Suzhou 215011,China)
出处
《苏州科技大学学报（工程技术版）》
CAS
2024年第2期27-33,共7页
Journal of Suzhou University of Science and Technology（Engineering and Technology Edition）
基金
2021年江苏省研究生科研创新计划项目(KYCX21_3032)。
作者简介
隽蓉蓉(1996-),女,江苏淮安人,硕士研究生;通信联系人:邵永健(1963-),男,教授,博士,主要从事混凝土结构工程研究,E-mail:syjsz@163.com。
