低屈服点钢剪切型阻尼器试验研究
Experimental investigation of low-yield-point steel shear panel dampers

针对滞回力学特性、低周疲劳性能以及耗能减震能力，进行了3组采用低屈服点钢BLY160的剪切型阻尼器的拟静力试验。试验选用2种尺寸型号的试件并采用了4种不同的加载方案，对比分析了不同加载历史下软钢的应变强化现象及低周疲劳性能，考察了阻尼器构件关键参数腹板宽厚比以及加劲肋尺寸的影响。试验结果表明：BLY160低屈服点钢材随等效塑性应变的累积有明显的循环强化现象，采用BLY160低屈服点钢的剪切型阻尼器初始刚度大，屈服位移小，变形能力强，具有良好的滞回性能和稳定的耗能特性。
Abstract：Pseudo-static tests of three groups of shear panel dampers made of low-yield-point steel, BLY160, were conducted to study the hysteresis in the mechanical properties, low cycle fatigue behavior and earthquake mitigation effects. Two specimens were subjected to four loading schemes to investigate the influences of stiffening rib size, width-thickness ratio of the web plate and the cyclical load history. The results show that the low-yield-point steel has significant cyclic hardening with the accumulation of plastic strain and that the damping devices using BLY160 steel have high initial stiffnesses, small yield displacement, favorable ductility, stable hysteresis and excellent energy dissipation.