복합구조물의 하부골조층수 변화에 따른 비선형 약산법의 응답특성 = The Response Characteristics of Approximate Nonlinear Methods with Variations in the Lower Stories of Mixed Building Structures

다국어 초록 (Multilingual Abstract)

One of the most accurate earthquake analysis method for the performance evaluation of structure is nonlinear time history analysis, but it is time-consuming and necessitate more efforts. Approximate methods are presented for estimating the capacity of structures while subjecting earthquake ground motions. This is made by exploiting the connection between the nonlinear static response of structure and the dynamic response of SDF system whose backbone matches the structure’s pushover curve. The capacity spectrum method is one of general approximate methods which is based on equivalent linearization where the inelastic deformation is approximated by the maximum deformation of an equivalent linear elastic system having equivalent viscous damping. It requires iterative computations, because the equivalent damping ratio is computed as a function of the maximum deformation. The nonlinear capacity spectrum method estimate the maximum inelastic deformation of SDF system by nonlinear response spectra. The nonlinear direct spectrum method is proposed and studied to evaluate nonlinear response of structures, without iterative computations, given by the structural linear vibration period and yield strength from the pushover analysis. In this study, it is to compare the accuracy and the reliability of approximate nonlinear methods with respect to upper wall-lower frame system and various earthquakes.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 비선형 약산법
• 2.1 비선형 직접스펙트럼법(NDSM)
• 2.2 능력스펙트럼법(CSM)
• 2.3 비선형 능력스펙트럼법(NCSM)
• 3. 해석모델과 지진동
• 3.1 기본가정
• 3.2 해석모델
• 4. 해석결과 및 분석
• 5. 결론
• 참고문헌