48 単純化モデルによる地盤と構造物の地震時動的相互作用のメカニズムに関する基礎的研究

概要

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For the purpose of considering nonlinearity and parametric explanation into study on mechanism of soil-structure interaction system, a simple lumped-mass model is proposed, with which, the analyses of seismic responses are executed for a lot of combinations of different soils and structures. The study shows that the first natural periods of free surface soil deposits and superstructures (T_g & T_b) are of important parameters. When T_b>T_g, the movement of ground in the first natural period of system works as resistance to the oscillation of superstructure; while in the case of T_b<T_g, it transfers as input to superstructure. The nonlinearities of soils and superstructures are developed separately. They affect each other obscurely. Generally, the nonlinear effects make the maximum values of acceleration responses smaller than in linear condition, and enlarge the displacement amplitude.
一般社団法人日本建築学会の論文
1997-03-20