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송호산(Song Ho-San) 동의대학교 정보통신연구소 2002 정보통신연구지 Vol.3-1 No.-
Though a nonlinear time history analysis may be provided to estimate more exactly the seismic performance of building structure, approximation methods are still needed in the aspect of practicality and simplicity. However, the characteristics of displacement mode are also changed after the yielding made in the structural elements, because the structure becomes inelastic in each incremental load step. In this research, a method of converting MDOF system to ESDOF system is presented by using nonlinear displacement mode considering the mode change of structures after the yielding. Also, the accuracy and efficiency of the method of the nonlinear displacement mode method of the estimate of seismic response of Mixed Building Structures were examined by comparing the displacements of the roof level of the multi-story building structures estimated from this converted displacement response of ESDOF with the displacement of the roof level through the nonlinear dynamic analysis of the multi-story building structures subjected to an actual earthquake excitation.
기하학적 비선형 해석기법에 의한 원통쉘의 좌굴해석에 관한 연구
송호산(song Ho-San) 동의대학교 정보통신연구소 2004 정보통신연구지 Vol.5 No.-
This paper presents buckling analysis of the circular cylindrical shell structures subjected to pressure loads considering geometrical nonlinearity. The geometrically nonlinear analysis is peiformed using a Updated Lagrangian Formulation. Based on the parametric study, buckling loads decreases significantly as the radius-thickness ratio increases, while buckling loads decreases slightly as the height-thickness ratio increases. These results are different from those obtained from buckling analysis of beams. The present results are compared with a solutions by Flugge's equations. Buckling loads reduces 1~2% compared with a solutions by Flugge's equations.
비선형 변위모드를 이용한 다층 골조구조물의 등가 단자유도계 변환
송호산(Song Ho-San),김부식(Kim Bu-Sik) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.9
A nonlinear static analysis is recently used in computing the seismic demands for the structure subjected to earthquake excitation in performance-based seismic code. Although a nonlinear time history analysis may provide better estimate on the seismic performance of building structure, approximation methods are still needed in the aspect of practicality and simplicity. In converting a multi-story structure to an equivalent SDOF system, the mode vectors of the multi-story structure are assumed as the mode shape in elastic state regardless of elastic or elastic-plastic state. However, after the yielding made in the structural elements, the characteristics of displacement mode are also changed because the structure becomes inelastic in each incremental load step.<br/> In this research, a method of converting MDOF system to ESDOF system is presented by using nonlinear displacement mode considering the mode change of structures after the yielding. Also, the accuracy and efficiency of the method are examined as the displacements at the roof level of the multi-story building structures estimated on a basis of this converted displacement response of ESDOF and the method is compared with the displacement at the roof level through the nonlinear dynamic analysis of the multi-story building structures subjected to an actual earthquake excitation.
이동된 요소를 갖는 케이블-막 구조물 해석을 위한 ALE 유한요소 알고리즘 개발
송평훈(Song Pyung-Hun),김재열(Kim Jae-Yeol),이진호(Lee Jin-Ho),송호산(Song Ho-San) 대한건축학회 2004 大韓建築學會論文集 : 構造系 Vol.20 No.3
The purpose of this study is development of a finite element algorithm to find out the stressed condition, slipped direction and<br/> slipped dimension when some elements of cable-membrane structures are slipped from it's initially designed coordinates by<br/> external loads as wind or non uniform load and so on. In order to search the slipped behaviors of cable-membrane structures, a<br/> Arbitrarily-Lagrangian-Eulerian(ALE) finite element formulation is introduced. In these procedures, a stiffness matrix related with<br/> ALE concept is formulated and a FE analysis program for cable-membrane structures with slipped elements is developed. Various<br/> examples for cable and membrane structures are presented to verify the program's validation. The results are shown good<br/> agreement with that of existed one.
김정현(Kim Young-Hyun),송호산(Song Ho-San) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)
The building frame system(R=5) is a system that the moment frame resist gravity load in whole and the shear wall resist the seismic load compatibility. This system is considered "Deformation Compatibility" in the Seismic Design Category (SDC) "D" (KBC2005 0306.6.4). This system is currently designed to the absence of concrete, the design and interpretation based on practical reasons such as difficulties in applying this situation is a lot of difficulties. Therefore, this study shows that the system's resistance seismic load practical purposes, and that the material is applied basic building framing system, the notice Ghosh's infomality, IBC 2000 and if applied to the forced displacement due to stress, if applied to the behavior of a design based on insights about the effectiveness of the literature.
국내 내진기준에 의해 설계된 RㆍC 구조물의 내진성능평가
한동훈(Han Dong-Hun),송호산(Song Ho-San) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)
Lately, there are a lot of buildings are built with earthquake-code design included. But in the instance of earthquakes, it is very effective in reaching the performance standard, but economically it will bring huge downside as it will destroy the building itself. Therefore researches are actively proceeded to reduce problems on the basis of anti-earthquake performance will not go down. This research will be using model buildings that are built with the dual system, from korean criteria for anti-earthquake, and this member model will be designed with the grounding of KOREAN BUILDING CODE AND COMMENTARY 2006. The designed model will be tested with pushover analysis and get data for power change due to displacement. also it will be evaluated with the capacity spectrum method which is one of the tools for anti-earthquake performance evaluation.
중간모멘트골조를 가진 이중골조시스템의 반응수정계수 연구
정우진(Jeong Woo-Jin),송호산(Song Ho-San) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
This study is still lacking studies using dual-frame structures used in the system have non-linear static pushover analysis performed Adviser to the plane of the structure height overstrength factor and ductility factor with the resulting value of response modification factor calculated building structure code and also identified in the response modification factor by comparing with the height of the planar structures that make up the response modification factor is the impact of factors on which is aimed at understanding.
신현정(Shin Hyun-Jung),송호산(Song Ho-San) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
The objective of this research building seismic force of resistance systems usually reinforced concrete shear walls framing systems (R=5) and special reinforced concrete shear walls (R=6) how to apply a variant of the Deformation Compatibility examines the behavior of the stress, and the default with simple formula which is used to interpret the expression according to the force by comparing the value of my displacement, structural analysis, according to the practice of interpretation is that to understand the degree of efficiency.
강막가정 유형에 따른 내력벽식 구조물의 거동에 관한 연구
정성훈(Jeong Seong-hoon),송호산(Song Ho-San) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
When you receive lateral structures of the in-plane deformation of the building base plate is very small compared lateral strain. This rigidity of plates, such as columns and shear walls of the vertical load carrying members is very large compared to the stiffness. In practice, however, the presence of slab out-plane bending stiffness of lateral load like earthquake or wind load, so you rigid diaphragm assumption a real difference with the distribution occurs. In this study the actual building process of a structural analysis based on the slab structure according to the ratio of the bending behavior of shear Wall structures and accordingly the results for the discussion is aimed to figure.