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언더텐션 시스템이 적용된 구조물의 비탄성 비선형 거동 해석
박덕근,이재홍,Park, Duk-Kun,Lee, Jae-Hong 한국공간구조학회 2009 한국공간구조학회지 Vol.9 No.2
본 논문은 Total Lagrangian(TL)과 Updated Lagrangian(UL)을 사용하여 구조물 하부에 케이블을 연결하고, 그 케이블에 인장력을 가하여 구조물의 처짐을 제어하는 언더텐션 시스템에 있어서 케이블의 인장력에 따른 구조물의 처짐 거동의 변화와 각 부재력을 비교함으로서 언더텐션 시스템의 효율성을 검증하는데 있다. 일반적인 빔과 거더로 이루어진 구조와는 달리 언더텐션 시스템에서는 상부에서는 하중을 하부 케이블의 인장력을 이용하여 그 하중을 양 단부로 전달하게 된다. 언더텐션 시스템은 스트럿의 개수와 길이, 케이블의 초기 인장력의 크기에 따라서 그 효과가 다르게 나타날 수 있다. 또한 케이블이 설치된 장스팬 구조의 경우, 그 거동에 있어서 비선형성적 거동이 크게 나타나게 된다. 따라서 본 논문에서는 선형과 비선형해석 결과를 비교함으로써 비선형해석의 필요성에 대하여 논의하고자 한다. This study presents geometric nonlinear and material analysis of under-tension structure using Total Lagrangian and Updated Lagrangian method. In the regard, the under-tension system enables the load of upper part to carry to the end of beam by pre-tensional force in cable. The under-tension system on lower part of the structure is applied in order to reduce the deflection and size of member. This study is performed with conforming of the effect by pretension value in the cable and applying loading. Dead and Live loads are supposed to apply nodal on the top member. The member force and deflection of the structure are with MIDAS and ADINA.
프리텐션이 가해진 트러스 구조물의 비탄성 비선형 거동해석
박덕근(Park Duk-Kun),박대하(Park Dae-Ha),이재홍(LEE Jae-Hong) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
Geometric and material analysis of truss structures with pretension using Updated Lagrangian method is presented, deflection and member force analysis of long span structures for pedestrian bridge on crossroads. Generally, long span structures, the size of structural members should be larger than short span structures. The under-tensioned system on lower part of the structure is applied in order to reduce the deflection and the size of members. In this regard, the under-tensioned system enables the load of upper parts to carry to the end of beam by means of tensional force in cable. This study in performed with conforming the effect by analytical carious parameters (Cable pretension value) in truss structures with pretension. Dead and live loads is supposed to apply on the upper member. The member force and deflection of the structure are between geometric nonlinear and material nonlinear effect
박덕근(Park Duk-Kun),이재홍(Lee Jae-Hong),안남식(Ahn Nam-Shik),이기학(Lee Ki-Hak),권준범(Kwun Joon-Bum) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)
This study presents nonlinear analysis of under-tension structures. In the regard, the under-tensioned system enables the load of upper parts to carry to the end of beam by means of tensional force in cable. The under-tensioned system on lower part of the structures is applied in order to reduce the deflection. Structure with under-tension system redistributes member force by pretension value in the cable. Member force makes effective size of member. In this paper, nonlinear analysis using finite element method is used. This study is performed with conforming of the effect by pretension value in the cable. Dead and live loads are supposed to apply nodal load on the top member. The member force and deflection of the structure are compared with MIDAS.
박대하(Park Dae-Ha),박덕근(Park Duk-Kun),이재홍(Lee Jae-Hong) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
This study presents inelastic nonlinear analysis of under-tension system. Under-tension system, composed of beam, cable and strut elements, reduces deflection and weight of the structure, since the moment is partially eliminated by cable and strut elements. The behavior of under-tension system is seriously influenced by length and number of the strut, intial strain of the cable. The longer span of the structure is, the more influenced the nonlinear behavior gets. This study is performed with the effect of pretension value and material yield stress. Dead and live loads are applied on the beam element and initial strains are applied in the cable. In this study, the behavior of under-tension system is analysed by ADINA based on FEM
안남식(Ahn Nam-Shik),최준호(Choi June-Ho),박덕근(Park Duk-Kun),이영학(Lee Young-Hak) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)
As a trend of construction has become high-rise and larger, it is necessary to reduce the self-weight of structures and buildings. One of the alternative plans to reduce the self-weight of structures and buildings is to use the lightweight aggregate concrete. In this study, experiments to make the moderate mixing proportion of polymer modified lightweight concrete were performed. As a hardened concrete test, the resistance of freezing and thawing was performed and investigated.