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首页> 外文期刊>Earthquake and structures: An International journal of earthquake engineering & earthquake effects on structures >On the response of base-isolated buildings using bilinear models for LRBs subjected to pulse-like ground motions: sharp vs. smooth behaviour
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On the response of base-isolated buildings using bilinear models for LRBs subjected to pulse-like ground motions: sharp vs. smooth behaviour

机译：使用双线性模型对LRB进行基础类建筑物的响应时，它们会受到类似脉冲的地面运动：尖锐行为与平滑行为

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摘要

Seismic isolation has been established as an effective earthquake-resistant design method and the lead rubber bearings (LRBs) are among the most commonly used seismic isolation systems. In the scientific literature, a sharp bilinear model is often used for capturing the hysteretic behaviour of the LRBs in the analysis of seismically isolated structures, although the actual behaviour of the LRBs can be more accurately represented utilizing smoothed plasticity, as captured by the Bouc-Wen model. Discrepancies between these two models are quantified in terms of the computed peak relative displacements at the isolation level, as well as the peak inter-storey deflections and the absolute top-floor accelerations, for the case of base-isolated buildings modelled as multi degree-of-freedom systems. Numerical simulations under pulse-like ground motions have been performed to assess the effect of non-linear parameters of the seismic isolation system and characteristics of both the superstructure and the earthquake excitation, on the accuracy of the computed peak structural responses. Through parametric analyses, this paper assesses potential inaccuracies of the computed peak seismic response when the sharp bilinear model is employed for modelling the LRBs instead of the more accurate and smoother Bouc-Wen model.
机译：隔震已被确立为一种有效的抗震设计方法，铅橡胶轴承（LRB）是最常用的隔震系统之一。在科学文献中，通常使用尖锐的双线性模型来捕获地震隔离结构中LRB的滞后行为，尽管可以通过平滑塑性来更准确地表示LRB的实际行为，如Bouc-文模。这两个模型之间的差异是根据在隔离级别计算出的峰值相对位移，峰值层间挠度和绝对顶层加速度来量化的（对于以多度为基础的基本隔震建筑而言）自由系统。在脉冲状地震动下进行了数值模拟，以评估隔震系统的非线性参数以及上部结构和地震激励的特性对计算峰值结构响应精度的影响。通过参数分析，当使用尖锐的双线性模型代替LRB而不是更精确和更平滑的Bouc-Wen模型进行建模时，本文评估了计算出的峰值地震响应的潜在误差。

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