粘滞阻尼减震结构振动台试验与动力可靠度分析

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (3) : 136-142.

论文

梅真，侯炜，郭子雄

作者信息 +

Shaking table tests and dynamic reliability analysis for aseismic structures with viscous dampers

MEI Zhen, HOU Wei, GUO Zixiong

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摘要

开展了随机地震动作用下粘滞阻尼减震结构振动台试验，并采用概率密度演化方法和等价极值事件原理，对有控和无控试验模型的动力可靠度分别进行了分析。结构控制振动台试验中，采用基于物理随机地震动模型生成的地震动样本作为台面输入。试验结果表明，采用粘滞阻尼器作为减振装置，能够显著降低模型结构层间位移反应的均值和标准差，与此同时，楼层剪力的均方根值一般也较无控时明显减小；随机地震动作用下，模型结构动力响应的变异性显著，并且不同试验地震动样本输入时，粘滞阻尼器取得的减振效果不同。试验模型动力可靠度分析结果表明，有控模型结构各楼层可靠度以及体系可靠度均较无控时显著提高，抗震可靠性明显增强。

Abstract

Shaking table tests were conducted on an aseismic structure model with and without viscous dampers. In tests, random ground motion samples generated by a physical stochastic ground motion model were taken as table inputs. Then reliability assessments were performed, respectively for test structure model with control and that without control using the probability density evolution method and the principle of the equivalent extreme value events. Test results revealed that both mean value and standard deviation of inter-story drift responses of the test structure model with dampers are significantly smaller than those in the uncontrolled cases; generally, RMS values of story shear forces in the controlled cases are obviously smaller than those in the uncontrolled cases; the variability of dynamic responses of the test structure model with dampers subjected to random earthquake ground motions is significant, the vibration control effects of viscous dampers are different when the test structure model is under inputs of various ground motion samples. Dynamic reliability analysis of the controlled structure model indicated that the aseismic reliability of its each story and that of the whole system are obviously enhanced compared with those in uncontrolled cases.

导出引用

梅真，侯炜，郭子雄. 粘滞阻尼减震结构振动台试验与动力可靠度分析[J]. 振动与冲击, 2018, 37(3): 136-142

MEI Zhen, HOU Wei, GUO Zixiong. Shaking table tests and dynamic reliability analysis for aseismic structures with viscous dampers[J]. Journal of Vibration and Shock, 2018, 37(3): 136-142

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