正弦波形钢板阻尼器力学性能试验研究

Experimental study on mechanical behavior of sinusoidal waveform steel plate damper

为解决传统剪切钢板阻尼器耗能腹板面外刚度小,大变形下容易发生面外屈曲等问题,提出一种正弦波形钢板阻尼器,考虑波形腹板的放置方向和屈服强度,设计4个试件,开展拟静力试验,探究其滞回性能、承载能力和刚度退化等。研究表明:耗能能力强、延性性能好,大变形下滞回性能稳定是正弦波形钢板阻尼器的特性;横向波形钢板阻尼器的峰值荷载较低,而其耗能能力、延性优于竖向波形钢板阻尼器;竖向波形钢板阻尼器的初始弹性刚度较大,但其刚度退化的速率大于横向波形钢板阻尼器;腹板采用低屈服点钢制作的阻尼器,其滞回曲线比较饱满。

In order to solve the problems of low out-of-plane stiffness of the energy dissipation web of traditional shear plate damper and easy to occur out-of-plane buckling under large deformation,a sinusoidal waveform steel plate damper was proposed.Considering the placement direction of the waveform web and the yield strength,four specimens were designed and tested under low cycle repetitive load to analyze the hysteretic performance,bearing capacity and stiffness degradation.The results show that strong energy dissipation capacity,good ductility,and stable hysteresis performance under large deformation is the characteristics of sinusoidal wave plate damper,and the transverse wave steel plate damper with low peak load is the best.The energy dissipation capacity and ductility are better than those of the vertical waveform steel plate damper,and its stiffness degradation rate is higher than that of the transverse waveform steel plate damper.The hysteretic curve of webs made of low yield point steel is full.