自复位梁-柱节点的耗能与复位能力协调关系研究

Research on Coordination Relationship Between Energy Dissipation and Recentering Capacities of Self-centering Beam-Column Joints

目的 研究自复位梁-柱节点(SCBCJ)的耗能与复位能力间协调关系,提出简化设计方法,从而实现SCBCJ耗能器与预应力筋的合理配置。方法 建立了SCBCJ的理论恢复力模型,对该类节点的复位与耗能能力协调关系展开研究,通过有限元分析验证了简化设计方法的可行性。结果 节点的耗能能力随着复位耗能比R的增大而增加,复位能力随着R的增大而减小;在循环荷载下,SCBCJ滞回曲线呈“旗帜”型,无残余变形,耗能能力较强。结论 所建立的协调关系表达式可以表征SCBCJ耗能与复位能力的协调关系,提出的简化设计方法实现了SCBCJ的耗能与复位能力的合理匹配,解决了设计时耗能器与预应力筋配置问题。

The purpose of this study is to investigate the coordinated relationship between energy dissipation and recentering capacity of Self-Centering Beam-Column Joints(SCBCJs),and propose a simplified design method to achieve rational configuration of energy dissipaters and prestressing tendons in SCBCJs.A theoretical restoring force model of SCBCJs is established to explore the coordinated relationship between recentering and energy dissipation capacities of such joints.The feasibility of the simplified design method is verified through finite element analysis.The energy dissipation capacity of the joint increases with the increase of the recentering-to-dissipation ratio R,while the recentering capacity decreases with the increase of R.Under cyclic loading,the hysteresis loop of SCBCJs exhibits a "flag" shape with no residual deformation,indicating strong energy dissipation capacity.The established expression of the coordinated relationship can characterize the energy dissipation and recentering capacities of SCBCJs.The proposed simplified design method achieves rational matching of energy dissipation and recentering capacities in SCBCJs,thereby addressing the issue of energy dissipater and prestressing bar allocation during design.