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摩擦摆(FPS)是一种具有球形滑动面的隔震装置,可用于保护大型工程结构免遭地震灾害的破坏。近年来,大空间建筑发展迅猛,为了提高其抗震性能,将FPS安装于网格屋盖与下部支承结构之间形成滑移隔震机制以降低结构的地震响应。针对某网架屋盖及其下部支承结构,开展了FPS滑移隔震研究。采用大型通用有限元软件ABAQUS,建立了整体结构的三维模型,模型中包括接触面单元和梁单元,能够反映结构的非线性行为。通过非线性时程分析,研究了考虑不同参数时FPS对于上述结构地震防护的可行性和有效性。
Friction Friction (FPS) is a seismic isolation device with a spherical sliding surface that can be used to protect large-scale engineering structures from earthquake disasters. In recent years, the rapid development of large space buildings, in order to improve its seismic performance, the installation of FPS between the roof grid and the lower support structure sliding slip isolation mechanism to reduce the seismic response of the structure. Aiming at the roof of a grid and the supporting structure of the lower part, the research of FPS sliding isolation was carried out. The large-scale general finite element software ABAQUS is used to build a three-dimensional model of the whole structure. The model includes the contact surface element and the beam element, which can reflect the nonlinear behavior of the structure. By nonlinear time-history analysis, the feasibility and effectiveness of FPS for earthquake protection of the above structure are studied considering different parameters.