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목표스펙트럼의 평균과 분산을 고려하기 위한 시뮬레이션 기반의 효율적인 지반운동기록 선정 알고리즘
석승욱,한상환,Seok, Seung-Wook,Han, Sang-Whan 대한건축학회 2012 대한건축학회논문집 Vol.28 No.2
Linear and nonlinear dynamic analyses become popular in seismic design and seismic performance evaluation procedures. The accuracy of the results of such analyses depends not only on accurate analytic model of structures but also a proper selection of input ground motions. The purpose of this study is to develop a computationally efficient and accurate algorithm for selecting ground motions considering the mean and variance of target response spectrum. The proposed algorithm adopts a simulation based process for generating a desired number ($=n_g$) of simulated response spectra using the Monte Carlo Simulation with information of the mean, variance, and correlation structure of target response spectrum. The accuracy of selecting ground motions using the proposed algorithm is improved by generating multiple (=100) sets of simulated response spectra. Ten sets are chosen from the 100 sets, which best match the mean and standard deviation of a target response spectrum. Ground motions are then selected for each of the top ten sets. The set of ground motions having the mean and standard deviation of their response spectra that best match the target response spectrum is the one to be selected. To verify the accuracy and efficiency of the algorithm, numerical examples are provided.
목표스펙트럼에 근사한 지반운동 선정 방법에 따른 결과 비교
석승욱(Seok Seung-Wook),한상환(Han Sang-Whan) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
Proper selection of ground motions is important for predicting accurate demand and capacity of the structure using linear and nonlinear time history analyses of the structure. This paper compares with results from two method for selecting ground motions matching a target spectrum which are proposed by Kottke and Rathje (2008) and Han and Seok (2011), respectively. each method help users to select ground motions from the ground motion library that have their mean response spectrum matching the shape and magnitude of the target response spectrum easily. Results from each method show that Han and Seok (2011)’s method is even more efficient and enough accurate to realize target values, especially a target variance.
석승욱 ( Seok Seungwook ),이상민 ( Lee Sangmin ),배백일 ( Bae Baekil ),배성철 ( Bae Sungchul ),최창식 ( Choi Changsik ) 한국구조물진단유지관리공학회 2022 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.26 No.1
최근 콘크리트의 내진, 내화, 내구 성능 향상을 목표로 삼중 나노소재 혼입 콘크리트가 연구 개발되었다. 본 연구는 이러한 고성능 콘크리트를 모사하기 위한 유한요소 재료 구성 모델을 기존의 검증된 모델 (ABAQUS 유한요소해석 프로그램의 Concrete Damaged Plasticity 모델)을 기반으로 최적화된 물성치를 제안하고자 한다.
목표스펙트럼의 평균과 분산을 고려하기 위한 시뮬레이션 기반의 효율적인 지반운동기록 선정 알고리즘
석승욱(Seok Seung-Wook),한상환(Han Sang-Whan) 대한건축학회 2012 大韓建築學會論文集 : 構造系 Vol.28 No.2
Linear and nonlinear dynamic analyses become popular in seismic design and seismic performance evaluation procedures. The accuracy of the results of such analyses depends not only on accurate analytic model of structures but also a proper selection of input ground motions. The purpose of this study is to develop a computationally efficient and accurate algorithm for selecting ground motions considering the mean and variance of target response spectrum. The proposed algorithm adopts a simulation based process for generating a desired number (=ng) of simulated response spectra using the Monte Carlo Simulation with information of the mean, variance, and correlation structure of target response spectrum. The accuracy of selecting ground motions using the proposed algorithm is improved by generating multiple (=100) sets of simulated response spectra. Ten sets are chosen from the 100 sets, which best match the mean and standard deviation of a target response spectrum. Ground motions are then selected for each of the top ten sets. The set of ground motions having the mean and standard deviation of their response spectra that best match the target response spectrum is the one to be selected. To verify the accuracy and efficiency of the algorithm, numerical examples are provided.