新型两阶段耗能开孔式低屈服点钢耗能装置试验研究  

Experimental study on new open-pore two-stage energy dissipation device with low yield point steel

作　　者：范圣刚[1,2] 丁智霞 舒赣平[1,2] 尚春方 刘美景[3] 

机构地区：[1]东南大学混凝土及预应力混凝土教育部重点实验室,南京210096 [2]东南大学土木工程学院,南京210096 [3]东南大学成贤学院土木工程系,南京210088

出　　处：《东南大学学报（自然科学版）》2016年第1期110-117,共8页Journal of Southeast University：Natural Science Edition

基　　金："十二五"国家科技支撑计划资助项目(2012BAJ13B014)

摘　　要：为了实现分阶段耗能的目标,基于Q235钢和低屈服点钢2种不同耗能材料,设计了一种新型开孔式耗能装置.根据不同的耗能材料和抛物线开孔方式,构建了具有不同屈服位移的2种耗能钢板,继而组装成整体耗能装置,实现两阶段耗能目标控制.针对2种耗能钢板进行单调加载试验,考察了不同参数状态下单片耗能钢板的屈服机理,给出了单板模型试件的荷载-位移曲线、屈服位移和屈服荷载.对耗能装置开展低周反复加载试验,揭示其两阶段耗能机理与破坏模式,得到耗能装置的滞回曲线、骨架曲线、等效黏滞阻尼比和等效刚度退化曲线.试验结果表明,新型两阶段耗能装置的滞回曲线饱满,耗能性能优越稳定,分阶段耗能特点明显.In order to implement two-stage energy dissipation,a newopen-pore energy dissipation device was designed based on Q235 steel and lowyield point steel. Two kinds of steel consumption sheets with different yield displacements were fabricated by different materials and parabola opening ways,and were assembled into an overall energy dissipation device to achieve the two-stage control target of energy dissipation. The monotonic loading tests were carried out on these two energy dissipation plates to investigate the yield mechanism considering different parameter settings. The loaddisplacement curves,yield displacements and yield loads of single-plate specimens were obtained.The lowreversed cyclic loading tests were conducted on the energy dissipation device,and the two-stage energy dissipation mechanism and the failure mode were revealed. The hysteretic curves,skeleton curves,equivalent viscous damping ratio,and equivalent stiffness degradation curves of the energy dissipation device were obtained. The experimental results showthat the newtwo-stage energy dissipation device has full hysteretic curves,stable energy dissipation performance,obvious energy dissipation in stages.

关 键 词：耗能装置 低屈服点钢 两阶段耗能 开孔式 滞回性能 

分 类 号：TU375.4[建筑科学—结构工程]