竖缝式墙型阻尼器力学性能及减震效果研究

Study on mechanical behavior and damping performance of mild steel damping wall with vertical slits

对新型竖缝式墙型阻尼器进行理论和试验分析,推导出适用于竖缝式墙型软钢阻尼器的力学参数计算公式,主要涉及弹性抗侧刚度、受剪承载力和屈服位移.结合试验分析和有限元模拟,进一步确定了承载力调整系数,并以某钢框架为例进行了算例分析.结果表明:在地震作用下,阻尼器能够充分耗散大部分地震能,从而使装有竖缝式软钢阻尼器的钢框架具有良好的减震性能.

The theory and experiment of the mild steel damping wall with vertical slits was analyzed. Based on the theoretical analysis,formulas of key parameters of the mild steel damping wall with ver-tical slits,including the elastic lateral stiffness,the shear bearing capacity and the yield displacement, were derived.By using the numerical models of dampers calibrated through test data,the adjustment coefficient of the bearing capacity was specified.Taking a steel frame as an example,the numerical example was analyzed.The results show that a large proportion of seismic energy can be dissipated by the mild steel damping walls with vertical slits,and the dampers significantly reduce the seismic re-sponses of the steel frame and have a desirable energy dissipation capacity.