考虑阻尼器极限状态的单自由度体系地震响应

为了研究液体黏滞阻尼器失效的3种极限状态（承载力极限状态、位移极限状态、混合极限状态）对单自由度结构体系地震响应的影响,首先对黏滞阻尼器的3种极限状态进行数值模拟,利用Ruaumoko-2D得到数值分析模型；其次,将两个层数分别为2层和10层的钢筋混凝土结构分别等效为两个单自由度体系,并与上述黏滞阻尼器并联,在逐级放大多条地震波和正弦波作用下,研究黏滞阻尼器的承载力极限、位移极限和混合极限对该单自由度体系在不同强度的地震作用下结构响应的影响.通过与不考虑极限状态的单自由度体系作比较,得到位移比随着输入地震动峰值速度的变化规律.

Seismic response of SDOF systems considering the limit states of viscous dampers

To study the effect of three limit states (force limit state, displacement limit state, and compound limit state) of a liquid viscous damper on the seismic response of single-degree-of-freedom (SDOF) systems, the three limit states of the viscous damper were simulated, and a reliable numerical analysis model was obtained by Ruaumoko-2D. Then, the reinforced concrete structures of two and ten storeys were modelled into two equivalent SDOF systems, each of which was connected in parallel with a viscous damper. Time history analyses under the increasing action of multiple seismic waves and sine waves were conducted respectively to investigate the influence of the force limit state, displacement limit state, and compound limit state of the viscous damper on the SDOF system response. By comparing with the SDOF systems without considering limit states, the variation of the displacement ratio with the peak speed of the ground motion was obtained.