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권민호(Kwon, Min-Ho),한길웅(Han, Gil-Woong) 한국산학기술학회 2010 한국산학기술학회논문지 Vol.11 No.3
지반과 구조물의 상호작용을 해석하는 한 방법으로 지반을 무한의 영역으로 가정하여 이를 무한요소로 모 델링한 후 구조물과 연동하여 해석하는 기법이 사용되었으나 하지만 기존의 동적 무한요소는 대부분 시간영역이 아 닌 주파수 영역에서 정식화되었고 중첩의 원리가 적용되어 구조물이나 지반의 비선형 거동을 해석에 포함하기 어렵 다. 본 연구에서는 시간영역에서 정식화가 가능하고 비선형 거동해석도 가능한 무한 요소를 개발하였다. 개발된 무한 요소를 다량의 유한요소를 사용한 결과와 비교하여 정확도를 검증하였고, 비선형 지반모델을 적용하여 비선형해석이 가능함을 확인하였다. 따라서 개발된 무한요소를 지반-구조물 상호작용에 적용할 수 있으며, 이를 바탕으로 구조물 내진 설계에도 활용할 수 있을 것으로 판단된다. Infinite element approach has been widely used to analysis soil-structure interaction, in which the soil domain is treated as infinite domain. However, most of the developed infinite element has been formulated in the frequency domain rather than the time domain to include the frequency contents of the earthquake or vibration wave. Due to that, those approaches have a critical limitation which is restricted to the linear elastic analysis. To main objective of this research is to develop the infinite element in the time domain to cooperate the inelastic soil and structure behavior. Developed infinite element is verified with the results of finite element analysis modeled in large domain. The nonlinear analysis also conducted to demonstrate the application of developed infinite element. Hence, based on above-mentioned statements, it can be concluded that the propose approach would assist for structure-seismic design.
2D Lattice 모델을 이용한 철근콘크리트 부재의 해석
박태규 ( Park Tae-gyu ),권민호 ( Kwon Min Ho ),김두기 ( Kim Doo-kie ),신홍영 ( Shin Hong-yeong ),한길웅 ( Han Gil-woong ) 한국구조물진단유지관리공학회 2008 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.12 No.2
In recent years, several significant progresses of the analytical technology for reinforced concrete structures have been achieved and as the result, nonlinear behavior of concrete is of interest in analysis and design. An efficient design concept for earthquake loads, is called performance based design, has been standard design in U.S.A, Europe and Japan since those countries experienced sever earthquake damage at end of 90's. To evaluate the performance of the concrete structures, the sophisticated as well as simple analysis tools are necessary. As usually, strut-tie model well predicts the strength of the disturbed region, however, it does not provide ductility information at the failure. Therefore, simple tools which able to predict both the strength and the ductility of RC structures are in demand. 2D lattice model is introduced on this study as the analysis tool for the RC structures subject to earthquake. Experimental correlation studies indicate the 2D lattice model quite well predict the strength as well as the ductility of RC structures.