方钢管铅芯阻尼器性能研究

Study of the performance of lead-filled square steel tube damper

针对方钢管更具适应性、节点构造简单、施工方便等特点,本文提出方钢管铅芯阻尼器.采用有限元方法对方钢管铅芯阻尼器的力学性能进行分析,并与圆钢管铅芯阻尼器进行对比研究.结果表明,与圆钢管铅芯阻尼器相比,方钢管铅芯阻尼器的延性和屈服剪力略低、屈服后刚度略高、初始刚度与耗能性能相近.因此,方钢管铅芯阻尼器能够满足耗能减震的作用.

Dampers are prevalent in seismic structure on account of the effective reduction of earthquake damage and loss of the structure. Lead-filled circular steel tube damper has excellent energy dissipation and stable working performance, in contrast, the lead-filled square steel tube damper is more adaptive in simple and reasonable joint and convenient construction. Finite element model is built to study mechanical behaviors of the lead-filled square steel tube damper. Then the comparative study of circular and square steel tube dampers is conducted. The results indicate that the square steel tube damper has a little smaller ductility and yielding shear, higher post-yielding stiffness and almost the same energy dissipation. Therefore, the lead-filled square steel tube damper meets the demand of energy dissipation and seismic mitigation.