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환봉샤프트와 드리프트 핀을 이용한 모멘트저항 접합부의 개발
백혜수(Baek Hei-Soo),이이무라 유타카(Iimura Yutaka) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.8
Recently, there is a movement to look at the possibilities of making "green" wooden structures viable in Korea. The purpose of this study is to determine the feasibility of using mechanical fasteners to design a pre-cut timber structure using fast growing "Sugi" mass produced glulam and moment resisting joints designed via a CAD/CAM system. We proposed a structure design based on using pre-stressed joints that consist of a threaded steel shaft and drift pin. We conducted cyclic loading tests on two types of joints, T -beam-column joint- and I -column base joint- to investigate the mechanical characteristics properties of these two joint forms. Our tests yielded conclusive evidence that incipient slip and statistical dispersion is improved by press-in dowel and pre-stress torque. By modeling the spring elements relating to the moment transfer; we derived a calculation formula in the rotation rigidity and the yield moment of the joint. When compared with the averages of experimental results, the numerical results obtained by the calculation formula ranged from 74 percent to 108 percent.
환봉샤프트와 드리프트 핀으로 연결된 모멘트저항 목조골조의 주기거동에 관한 실험적 연구
백혜수(Baek Hei-Soo),이이무라 유타카(Iimura Yutaka),이마이 후지오(Imai Fujio) 대한건축학회 2010 大韓建築學會論文集 : 構造系 Vol.26 No.12
A new type of connection by threaded steel shaft and drift pin has been developed. In this paper, the cyclic loading tests were conducted on moment-resisting timber frames with the connection detail. And a simplified analysis model was developed to present the test results. In this analysis model, it was assumed that the length of timber frame members, except for the plastic hinge zone, is elastic. A tri-linear model for beam-column connection and column-base connection was derived from previous component test results. Rotational rigidity values defined by tri-linear model were applied to the end of timber frame members. Comparing the results obtained from the cyclic loading tests and the results calculated by the analysis model, the validity of the modeling was confirmed. However, the breaking point of timber frame cannot be found by this model.