Energy Response Analysis Of Base-isolated Structure And Influence Research In The Condition Of Side Impaction

In current research of base-isolated structure, lots of researchers use 2D model to analyze the structure and assume that superstructure keep elastic stage in earthquake and just isolators can into plastic stage. According to the question, four-floors frame construction models are built in the cases of having isolating components and no isolating components: all the structure use 3D models, members of superstructure use elasto linkage models, isolators of base-isolated structure use a force-displacement relation based LRB model. By way of energy response analysis of the structure, the paper discusses the energy dissipation of base-isolated structure, elastic-plastic deformation of superstructure, the relation of superstructure and isolators in earthquake and investigate the security and economic value of base-isolated structure.Generally speaking, the displacement of isolator is comparatively large, so the base-isolated structure may impact with the adjacent structures, result that the energy response of superstructure higher than expectation value. The paper use ideal elastic model to simulate the impaction course. Discussed whether the isolation can protects the structure when in impact with the adjacent structures. A influence index about the impact effect is also defined in the paper. According to the index and the earthquake response of the base-isolated structure, the different effects of the impaction stiffness, superstructure stiffness, the bearing, the distance between the structure and adjacent structures and seismic wave are discussed.