论文部分内容阅读
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 achieve the goal of staged energy consumption, a new type of open-cell energy dissipation device is designed based on Q235 steel and two different energy-consuming materials of low yield point steel.According to different energy-consuming materials and parabolic openings, Two kinds of energy-dissipating steel plates with different yield displacements are assembled into an integral energy-dissipating device to achieve the two-stage energy consumption target control.According to the monotonic loading tests of two kinds of energy-consuming steel plates, Yield mechanism and the load-displacement curve, yield displacement and yield load of the single-plate model are given.The low-cycle repeated loading test of the energy-dissipating device is carried out to reveal its two-stage energy dissipation mechanism and failure mode, Hysteresis curve, skeleton curve, equivalent viscous damping ratio and equivalent stiffness degeneration curve.The experimental results show that the hysteresis curve of the new two-stage energy dissipation device is full, the energy dissipation performance is superior and stable, and the energy consumption in different stages is obvious.