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首页> 外文期刊>Bulletin of earthquake engineering >Effect of the damper property variability on the seismic reliability of linear systems equipped with viscous dampers
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Effect of the damper property variability on the seismic reliability of linear systems equipped with viscous dampers

机译：阻尼物质变异性对粘性阻尼器配备的线性系统抗震可靠性的影响

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Viscous dampers are dissipation devices widely employed for seismic structural control. To date, the performance of systems equipped with viscous dampers has been extensively analysed only by employing deterministic approaches. However, these approaches neglect the response dispersion due to the uncertainties in the input as well as the variability of the system properties. Some recent works have highlighted the important role of these seismic input uncertainties in the seismic performance of linear and nonlinear viscous dampers. This study analyses the effect of the variability of damper properties on the probabilistic system response and risk. In particular, the paper aims at evaluating the impact of the tolerance allowed in devices' quality control and production tests in terms of variation of the exceedance probabilities of the Engineering Demand Parameters (EDPs) which are most relevant for the seismic performance. A preliminary study is carried out to relate the variability of the constitutive damper characteristics to the tolerance limit allowed in tests and to evaluate the consequences on the device's dissipation properties. In the subsequent part of the study, the sensitivity of the dynamic response is analysed by harmonic analysis. Finally, the seismic response sensitivity is studied by evaluating the influence of the allowed variability of the constitutive damper characteristics on the response hazard curves, providing the exceedance probability per year of EDPs. A set of linear elastic systems with different dynamic properties, equipped with linear and nonlinear dampers, are considered in the analyses, and subset simulation is employed together with the Markov Chain Monte Carlo method to achieve a confident estimate of small exceedance probabilities.
机译：粘性阻尼器是广泛用于地震结构控制的耗散装置。迄今为止，仅通过采用确定性方法，仅广泛分析了配备粘性阻尼器的系统的性能。然而，这些方法由于输入中的不确定性以及系统性质的可变性而忽略了响应分散。最近的一些作品突出了这些地震意识不确定性在线性和非线性粘液阻尼器抗震性能的重要作用。本研究分析了阻尼器特性变异性对概率系统响应和风险的影响。特别是，本文旨在评估设备质量控制和生产试验中允许的耐受性的影响，而是在对地震性能最相关的工程需求参数（EDP）的超标概率的变化方面的影响。进行了初步研究，以将组成阻尼特性的可变性与试验中允许的公差限制相关，并评估对器件的耗散性质的后果。在随后的研究部分中，通过谐波分析分析了动态响应的灵敏度。最后，通过评估允许的响应危险曲线上的组成阻尼特性的允许变化的影响来研究地震反应灵敏度，从而提供每年EDP的概率。在分析中考虑了一组具有不同动态性能的线性弹性系统，配备有线性和非线性阻尼器，并且子集模拟与马尔可夫链蒙特卡罗方法一起使用，以实现对小的超标概率的自信估计。

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