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目前大跨空间结构抗震研究的分析模型主要是基于刚性地基假设.为了更好地反映空间结构在地震作用下的反应性能,有必要把上部屋盖与下部支承结构以及下部地基作为一个整体建模分析.土-结构相互作用在高层结构中研究得比较充分,空间结构研究土-结构相互作用则较少.本文从土-结构相互作用模型、辐射阻尼以及地震动输入三方面对研究现状进行总结.考虑土-结构相互作用的空间结构抗震的深入研究将有助于空间结构的更合理的抗震设计.
At present, the analytical model of seismic analysis of long-span space structures is mainly based on the assumption of rigid foundation.In order to better reflect the response of space structures under the action of earthquake, it is necessary to model the upper roof with lower support structure and lower foundation as a whole Soil-structure interaction is well studied in the high-rise structure and there is less soil-structure interaction in the study of the space structure.This paper summarizes the research status from three aspects: soil-structure interaction model, radiation damping and ground motion input In-depth study of aseismic design of a space structure considering soil-structure interaction will contribute to a more rational seismic design of the space structure.