Abstract

At present, there is not much research on mid-story isolated structures in mountainous areas. In this study, a model of a mid-story isolated structure considering soil-structure interaction (SSI) in mountainous areas is established along with a model that does not consider SSI. Eight long-period earthquake waves and two ordinary earthquake waves are selected as inputs for the dynamic time history analysis of the structure. The results show that the seismic response of a mid-story isolated structure considering SSI in mountainous areas can be amplified when compared with a structure that does not consider SSI. The structure response under long-period earthquakes is larger than that of ordinary earthquakes. The structure response under far-field harmonic-like earthquakes is larger than that of near-fault pulse-type earthquakes. The structure response under near-fault pulse-type earthquakes is larger than that of far-field non-harmonic earthquakes. When subjected to long-period earthquakes, the displacement of the isolated bearings exceeded the limit value, which led to instability and overturning of the structure. The structure with dampers in the isolated story could adequately control the nonlinear response of the structure, effectively reduce the displacement of the isolated bearings, and provide a convenient, efficient and economic method not only for new construction but also to retrofit existing structures.

中文翻译：

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考虑SSI的山区中层隔震结构长周期地震响应

摘要

目前，对于山区中层孤立结构的研究还不多。本研究建立了山区考虑土壤-结构相互作用（SSI）的中层隔震结构模型以及不考虑SSI的模型。选择八个长周期地震波和两个普通地震波作为结构动力时程分析的输入。结果表明，山区考虑SSI的中层隔震结构与不考虑SSI的结构相比，其地震响应可以得到放大。长周期地震下结构的响应比普通地震大。远场类谐波地震下的结构响应大于近断层脉冲型地震。近断层脉冲型地震下的结构响应大于远场非简谐地震。当遭受长周期地震时，隔震支座的位移超过极限值，导致结构失稳和倾覆。隔震层阻尼结构能够充分控制结构的非线性响应，有效减小隔震支座的位移，为新建工程和既有结构的改造提供了方便、高效、经济的方法。