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비선형 응답이력해석의 영향인자에 대한 사례연구 - 1989 Loma Prieta 지진 계측기록을 중심으로 -
유계항,이진선 한국지반공학회 2017 한국지반공학회논문집 Vol.33 No.12
As many seismic codes for various facilities are changed into a performance based design code, demand for a reliablenonlinear response-history analysis (RHA) arises. However, the equivalent linear analysis has been used as a standardapproach since 1970 in the field of site response analysis. So, the reliability of nonlinear RHA should be providedto be adopted in replace of equivalent linear analysis. In this paper, the reliability of nonlinear RHA is reviewed fora layered soil layer using Loma Prieta earthquake records in 1989. For this purpose, the appropriate way for selectingnonlinear soil models and the effect of base boundary condition for 3D analysis are evaluated. As a result, there isno significant differences between equivalent linear and nonlinear RHA. In case of 3D analysis, absorbing boundarycondition should be applied at base to prevent rocking motion of the whole model.