【摘要】 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。更多还原

【Abstract】 Friction pendulum system(FPS)is a type of seismic isolator with spherical sliding surface that is intended for protecting large engineering structures from damages of earthquake.In recent years,large space buildings have been developed significantly.To improve the seismic performance of such buildings,the FPS is installed between the roof and substructure to form a sliding isolation mechanism to reduce the seismic response of the structure.A sliding isolation study is performed for steel lattice grid roof structures with substructures.The 3-D structural models are implemented by using the ABAQUS general-purpose finite element program.In the FE models,the FPS and structural components are simulated respectively with contact surface and beam elements to capture the nonlinear behavior of the structure.Nonlinear time-history analyses are executed to investigate the feasibility and effectiveness of the FPS under different parameters.更多还原