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포탈 프레임의 반강접 접합부 구조거동에 관한 실험적 연구
윤성기(Yoon Sung-Kee),신영식(Shin Young-Sig),이승은(Lee Seung-Eun),이치형(Lee Chy-Hyoung) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.4
The purpose of this study is to investigate the structural behavior of connections of portal frame built up from Hollow Flange sections. Connections of portal frame is composed of column base, rafter to column joints and rafer to rafter joints. The rafter is connected to the column or the rafer by bolted end-plate connection. Three types of joint have been selected for testing-column base, rafter to column joints (what is called the knee joint) and rafer to rafter joints. Total number of test specimens is seventeen. The parameter of experiment is thickness of end plate, the number of bolt and the shape of end-plate. Two types of loading for knee joint tests are selected. One is static loading and the other is cycling loading. For column base tests, cantilever testing mode is applied. The strength, rotationnal stiffness of portal frame connections is investigated by the tests of bolted end-plate connections. And moment-rotationnal relationship and load-displacement of the connection tests are proposed. For the connections of portal frame, it is known that 8-bolt extended end plate connections have superior stiffness and rotation capacity. Also, 8-bolt flush end-plate connections shows good strength similar to 8-bolt extended end-plate connection.
초기 불완전을 고려한 얇은 판 보의 비선형 유한요소해석
변대근,신영식,윤성기 釜山大學校生産技術硏究所 1996 生産技術硏究所論文集 Vol.50 No.-
얇은 판 부재의 초기 불완전을 고려한 비선형 유한요소해석을 행하고 이를 기존의 실험 결과와 다른 해석치와 비교하였다. 유한요소 해석의 유형은 부재의 결함이 전혀 없는 부재의 해석과 부재 두께의 1/2에 해당되는 국부적인 초기 불완전을 고려한 해석을 수행하였다. 또한 국부적인 초기 불완전과 함께 부재길이의 1/150에 해당하는 전체적인 초기 불완전을 고려한 해석을 행하고 이 해석들을 실험 결과와 비교 고찰하였다. 부재 길이가 짧은 경우에는 해석과 실험 결과가 잘 일치하였고, 부재 길이가 긴 경우에는 다소의 오차가 발생하였다. Nonlinear Finite Element Analysis considering initial imperfection of thin-walled beams are used to investigate the behavior of thin-walled beams. Three types of initial imperfection analysis consists of perfect ; only local ; and local-global type, respectively. As a local type of initial imperfection 1/2 of member thickness is introduced and for a global type of initial imperfection 1/150 of member length. The initial imperfection analysis on the load-displacement relationship of thin-walled beams is compared with results of experiment. In case of relatively short beams, this analysis is well agree with experiment.