新型自复位混合摇摆柱可恢复功能性能分析

Earthquake Resilient Performance Analysis of a Novel Self-centering Hybrid Rocking Column

目的 提出一种带有可更换软钢耗能器的新型自复位混合摇摆柱(RHD-RRC),以解决传统框架在震后易损坏且不易修复问题。方法 利用ABAQUS软件建立了RHD-RRC有限元模型,并进行低周循环往复加载试验。通过滞回曲线、骨架曲线等分析其自复位能力、刚度退化及耗能能力等,进而对比分析普通摇摆柱和RHD-RRC的地震可恢复功能性能的区别。结果 与普通摇摆柱相比,RHD-RRC的滞回曲线饱满且平滑,具有良好的耗能能力和自复位能力,强度和刚度更高、且刚度退化和强度退化较为缓慢。结论 RHD-RRC良好的耗能能力和自复位能力可以实现框架结构的可恢复变形能力,以有效解决传统框架柱震后易损坏且不易修复的问题。

A novel resilient rocking column with replaceable soft steel energy dissipator(RHD-RRC)is proposed to solve the issue of the traditional frame being vulnerable to damage and difficult to repair after earthquake.A finite element model of the RHD-RRC is established by using ABAQUS,and a simulation of low-cycle reciprocating loading test is performed.Through the analysis of hysteresis curves,skeleton curves and so on,the self-recentering ability,stiffness degradation and energy dissipation ability are investigated,and the difference between the earthquake resilient performances(ERPs)of the ordinary RHD and the proposed RHD-RRC is numerically compared.The results show that the hysteretic curves of RHD-RRC are fuller and smoother with better energy dissipation capacity and ERPs,higher strength and stiffness,and slower strength and stiffness degradation than that of the ordinary HRC.The high energy dissipation and self-recentering capacities of RHD-RRC can be used to realize the ERPs of frame structures,effectively solving the problem for frame columns being damageable during earthquakes and difficultly repairing after earthquakes.