Restoring force modeling of CFRP-reinforced concrete composite torsional members resilience modeling study
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 es-tablished.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.
CFRPcomposite torsional membersskeleton curvehysteresis rulesresilience model
万方数据
维普
