Flat Slab 의 휨모멘트를 구하는 해석방법에 관한 연구

송호산 대한건축학회 1997 大韓建築學會論文集 Vol.13 No.1

횡하중을 받는 반강접 접합부의 변형거동에 관한 연구

송호산 동의대학교 산업기술개발연구소 2001 産業技術硏究誌 Vol.15 No.-

Beam-to-column connections are complicated but very important. The constructing and economic benefits also have to be secured. This propose of this study was to analyze deformation behavior of frame with Top and Seat angle connections according to varying thickness of angle. Te investigate the deformation behaviors of Top and Seat angle connections, plate element have been used in this finite element analysis. The final results show that thickness of angle have un effects on deformation behavior of Semi-rigid connections with Top and Seat angle connections.

등가 1 자유도계에 의한 철근콘크리트 모멘트 골조구조의 비선형 지진응답 평가법의 검토

송호산,전대한 한국지진공학회 2003 한국지진공학회논문집 Vol.7 No.1

건축구조물의 내진성능을 효율적으로 평가하기 위해서는 다자유도계 구조물을 등가 1자유도계로 표현하는 것이 필요하다. 본 연구는 다층 철근콘크리트 골조구조를 등가 1자유도계로 치환하는 방법을 제시하였다. 다층 철근콘크리트 모멘트 골조를 등가 1자유도계로 치환하여 모델화에 따른 비선형 시간이력해석을 통하여 다자유도계 구조물의 축약 방법의 타당성을 검토하는 것이 목적이다. 다층 골조구조의 정적 비선형 해석을 수행하여, 등가 1자유도계의 복원력 모델을 설정하였다. 다층 골조 구조의 비선형 시간이력해석 응답치와 등가 1자유도계의 시간이력해석 응답치를 비교하여, 등가 1자유도계 모델의 타당성을 검증하였다. 다층 철근콘크리트 골조구조를 등가 1자유도계로 치환하여 비선형 지진응답을 구하는 방법은 충분히 그 타당성이 있다는 것이 확인되었다. 다층 철근콘크리트 골조구조의 대표변위로서 1차모드참여 yector_1,\beta{_1\mu}= 1인 높이가 등가 1자유도계의 응답을 가장 근사하게 나타내는 것을 알 수 있었다. 등가 1자유도계의 지진응답해석에 사용하는 복원력 모델의 이력곡선에 따라 응답파형에 차이가 생기므로, 실제 frame 구조의 복원력 특성을 반영한 이력모델을 선정하는 것이 중요하다. To evaluate the seismic performance of multistory building structures use an equivalent SDOF model to represent the resistance of the structure to deformation as it respond in its predominant mode. This paper presents a method of converting a MDOF system into an equivalent SDOF model. The principal objective of this investigation is to evaluate appropriateness of converting method through perform nonlinear time history analysis of a multistory building structures and an equivalent SDOF model. The hysteresis rules to be used an equivalent SDOF model is obtained from the pushover analysis. Comparing the peak inelastic response of a moment resisting reinforced concrete frames and an equivalent SDOF model, the adequacy and the validity of the converting method is verified. The conclusion of this study is following; A method of converting a MDOF system into an equivalent SDOF model through the nonlinear time history response analysis is valid. The representative lateral displacement of a moment resisting reinforced concrete frames is close to the height of the first modal participation vector \ulcorner_1{\beta}{_1{\mu}}=1. It can be found that the hysteresis rule of an equivalent SDOF model have influence on the time history response. Therefore, it necessary for selecting hysteresis rules to consider hysteresis characteristics of a moment resisting reinforced concrete frames.

경간비와 헌치기울기 변화에 따른 철근콘크리트 헌치보의 전단성능에 관한 연구

송호산 한국구조물진단유지관리공학회 2002 한국구조물진단유지관리공학회 논문집 Vol.6 No.1

Reinforced concrete haunched beams have been used for enhancement of shear resistance of beams to avoid the stress concentration. But American and British codes do not give any formula for the design of haunched beams. The purpose of this research is to experimentally investigate the shear failure of reinforced concrete haunched beams for various haunch inclinations and shear span-to-depth ratios. The experimental results showed that even though shear behavior of haunched beams were similar to that of resembled rectangular beams, shear span-to-depth ratios and inclinations of haunch had effects on shear cracking strength.

주응력에 의한 Flat Plates 의 연구

송호산 대한건축학회 1989 大韓建築學會論文集 Vol.5 No.5

수정계수에 의한 기둥축소량 산정에 관한 연구

송호산 동의대학교 산업기술개발연구소 2000 産業技術硏究誌 Vol.14 No.-

As the structural is higher, the accumulation of the column shortening grows gradually. So the decrease of a axial direction different story with basis design it brings about the differential shortening amount as changed intial position of lateral member like slab or beam by different of the displacement amount causes the different of each column load. Therefore, special care should be paid for the columm shortening effects on high-rise building. Growing the differential shortening amount, it occurs an additional stress like shear force of bending moment at slab or beam, after construction the reduction of the main structure member that occurs contnuously causes big obstacles of usage of the whole building by additional displacement in sub-structure member that unchaged vertical load like interior partition wall, equipment system and facing member. In this study, the column shortening effects on high-rise building is investigated by in-house column shortening analysis which can accounts for construction sequence on elastic and inelastic column shortening. In the most the analysis programs don't consider creep, shrikage. So, the paper suggest correction factor, to solve the problem without elaborated step by step, inelastic shortening(creep, shrikage) analysis are proposed.

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.

有限要素法에 依한 非正規 기둥 配置인 FLAT PLATES의 擧動에 關한 硏究

宋皓山 東義大學校産業技術開發硏究所 1987 産業技術硏究誌 Vol.1 No.-

Flat plate floor system is more economical and adaptable than in case of the structure of Bearing wall or Beam, and most of today's Flat slab structures have rectangular grid column layout. The diversity of the functional requirement of building design often needs irregular column layout, but it still remains in no practical use for want of theoretical research. This paper is study Flat plate by Elasticity and to analysis the Flat plate structure of irregular column layout by the finite element method, after selecting the Flat Plate structure of irregular column layout in a triangle, hexagon, and the quadadrangl of a basic pattern, and changing each periphery ratio to λ=1.0∼2.0, and to examine the stress behaviour by comparing with elasticity in case of rectangular grid column layout, and plotting each case.

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.

연성 구조물의 요소이동 해석 방법에 관한 연구

송호산(Song Ho-San),송평훈(Song Pyung-Hun) 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.11