METHOD OF REDUCING SEISMIC RESPONSE ANALYSIS MODEL AND CLARIFICATION OF ITS APPLICABILITY

Abstract

Mass spring model is used in structural earthquake response analysis because of its low computational cost. Today constructing mass spring model which is consistent with solid element model and clarifying its applicability are desired. This study proposed the methodology of constructing mass spring model by reducing solid element model based on meta-modeling theory. At first, we proved there is no mass spring model whose eigenvalue and mode are the same as solid element model, then we constructed mass spring model whose eigenvalue and mode are approximately close to solid element model. In numerical analysis, we conducted linear and nonlinear dynamic analysis and clarified new model's applicability. At last, we made reference to mass spring model's applicability for structures which has more complicated configuration.