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设计了分别开椭圆形孔和菱形孔的2种新型H型钢耗能器,阐述了它们的构造与耗能原理。采用有限元软件ABAQUS对开椭圆形孔、菱形孔和条形孔这3种新型耗能器的耗能性能进行数值分析,研究了开孔形状、肢宽与肢高等参数对新型耗能器耗能性能的影响。分析结果表明:新型H型钢耗能器具有饱满的滞回曲线,屈服位移较小、耗能性能稳定,耗能器的屈服位移、初始刚度和等效阻尼比随各肢钢板宽度增大(或高度减小)而增大;在开孔率相近或者肢宽相同的情况下,菱形孔H型钢耗能器的等效阻尼比要比条形孔和椭圆形孔的大,且应力分布更加均匀。
Two kinds of new type H-shaped steel energy dissipators with oval holes and rhombic holes are designed respectively, and their structure and energy dissipation principle are expounded. The finite element software ABAQUS was used to analyze the energy dissipation performance of three kinds of new energy dissipators, such as oval hole, diamond hole and strip hole. The influence of the parameters such as hole shape, limb width and limb height on the new energy consumption The impact of performance. The results show that the new type H-beam energy dissipator has a full hysteresis curve with a small yield displacement and a stable energy dissipation. The yield displacement, initial stiffness and equivalent damping ratio of the energy dissipater increase with the width of each plate Height decreases); in the case of similar hole opening rate or the same limb width, the equivalent damping ratio of H-shaped steel dampers is larger than that of strip holes and oval holes, and the stress distribution is more uniform .