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지진하중을 받는 철골 모멘트 골조의 전체붕괴 예측을 위한 근사적 방법
박만호(Piao Wan-Hu),김종보(Kim Jong-Bo),문기훈(Moon Ki-Hoon),한상환(Han Sang-Whan) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.4
The global collapse of steel moment resisting frames under seismic excitations is predicted by performing incremental dynamic analysis (IDA) as a function of the selected intensity measure, IM. This procedure requires nonlinear response history analysis (NL-RHA) of the structure for an ensemble of ground motions, each scaled to many intensity levels, selected to cover a wide range of structural response - all the way from elastic behavior to dynamic instability. Recognizing that IDA of practical structures is computationally extremely demanding, an approximate procedure based on the first mode equivalent single degree of freedom (SDF) system is developed. The global collapse of 9- and 20-story steel moment resisting frames are computed by the exact and the approximate procedure. By using the proposed approximate procedure, this study estimates the probability of collapse as a function of the IM and compares the results with the exact values, from which the accuracy of the proposed procedure is verified.
Peak-Oriented 단자유도 시스템의 비탄성변위비
이권희(Lee Kwon-Hee),박만호(Piao Wan-Hu),문기훈(Moon Ki-Hoon),한상환(Han Sang-Whan) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.9
This study investigates the effect of natural period, strain-hardening ratios, post-capping stiffness ratios, ductility, yield-strength reduction factor, and damping ratios on inelastic displacement ratio (CR) of peak-oriented SDF systems located at the sites classified as NEHRP site class B, C and D. Since equations for CR have been proposed for bilinear systems, it is difficult to estimate CR for the systems having hysteretic properties with strength and stiffness deterioration, and P-Δ effects. This study conducts nonlinear regression analysis for proposing a equation. the proposed equation is consisted for calculating 16%, 50%, and 84% inelastic displacement ratio for peak-oriented SDF systems.