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케이블 기반 개폐 막 지붕의 원통형 최적 트롤리 모델의 개발
이돈우,손수덕,이승재,Lee, Don-Woo,Shon, Sudeok,Lee, Seungjae 한국공간구조학회 2020 한국공간구조학회지 Vol.20 No.4
This study examines the optimum shape of a trolley, the driving device of the retractable membrane roof. The closed-type trolley was determined as the model of the study, and a trolley composed of cylindrical-shaped inner and outer holders was selected as the basic model. Based on this model, a cylindrical-based optimal trolley model was proposed. In the basic trolley model, steel was used for the outer holder, and steel, titanium, and aluminum were used for the inner holder. In each case, the most economical shape for the external load of the basic model was newly proposed through the topology optimization process, and the finite element analysis results of the proposed model were compared to define the durability and economics. Here, topology optimization analysis and finite element analysis used the commercial software ANSYS. As a result of optimization, the volume of the outer holder of the trolley was reduced by 58.2% and the volume of the inner holder was reduced by 25.0% compared to the basic model. In the case of stress, a stress increase of 43.2 to 79.2% occurred depending on the material of the inner holder, but it was found to be significantly lower than the yield strength, thereby ensuring safety.
용접형과 무용접형 하지철물의 수평변위 추종능력에 관한 연구
이돈우,곽의신,손수덕,이승재,Lee, Don-Woo,Kwak, Eui-Shin,Shon, Su-Deok,Lee, Seung-Jae 한국공간구조학회 2016 한국공간구조학회지 Vol.16 No.4
Building hardware joints are welded in most cases, which have risks of fire and explosion. Besides, the secondary damage of the destruction of the welded parts can be caused by the horizontal displacement of the structure due to earthquake or wind load. This paper compared the horizontal displacement following abilities of welded building hardware and non-welded building hardware. To do this, We conducted actual formation shake table test, and checked on the horizontal displacement following ability of structure by comparing their responses to earthquake load. We made the 2m-high framework to examine the responses of the actually constructed building hardwares, and analyzed the displacement responses of the welded-typed, non-welded-typed, and cruciform bracket building hardwares. We conducted the test by increasing acceleration rate until displacement reached 40mm corresponding to allowable relative story displacement II. The result of the test showed that the building hardware using welding work made cracking and breakage on welded connections of welded building hardware, but non-welded building hardware with no use of welding work and cruciform bracket building hardware make no problem, and that non-welded building hardware is superior to that of the welded building hardware in the horizontal displacement following ability due to earthquake or wind load.
Q-bit의 확률론적 데이터를 이용한 트러스 구조물의 최적 설계
이돈우 ( Lee¸ Don-woo ),하현주 ( Ha¸ Hyun-ju ),이규민 ( Lee¸ Gyu-min ),손수덕 ( Shon¸ Su-deok ),이승재 ( Lee¸ Seung-jae ) 한국구조물진단유지관리공학회 2023 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.27 No.2
양자 컴퓨팅은 양자 컴퓨터의 개발로 인해 많은 연구자에 의해 개발되고 있지만, 컴퓨터공학 및 물리 등의 분야에 한정되어 연구가 진행되고 있다. 하지만 건축 분야에서는 이러한 신기술의 접목이 늦은 편에 속하며, 양자 컴퓨팅과 같은 신기술을 빠르게 접목할 필요가 있다. 따라서 본 논문에서는 Q-bit의 확률론적 데이터를 이용하여 메모리를 구성하는 메타휴리스틱스 알고리즘을 제안하고, 트러스 구조물 예제에 적용하여 사이즈 및 위상 최적화를 수행하였다.
건축물의 수평변위 추종이 가능한 무용접 하지철물의 지진거동 평가
이돈우(Lee, Don-Woo),이승재(Lee, Seung-Jae),손수덕(Shon, Su-Deok) 대한건축학회 2017 大韓建築學會論文集 : 構造系 Vol.33 No.9
In general, building hardware is needed to attach exterior materials like panels and bricks to the structure, which is usually accompanied with welding work. However, welding work could have the possibilities of fire and consequent secondary damage by weld zone breakdown caused by earthquake or wind load. Therefore, this study is to compare and investigate the adaptation of non-welded cruciform bracket building hardware. To do this, We conducted actual formation shake table test with the welded and non-welded building hardware, and analyzed the horizontal displacement following ability through displacement response results. To do the test, We made the 2m-high framework, attached cruciform bracket building hardware and welded building hardware to its both sides, and applied EL Centro earthquake wave to it. The result of analyzing the responses with increasing earthquake wave acceleration rate showed that 40mm displacement corresponding to allowable relative story displacement II occurred when 300% acceleration rate was applied. The result of the test showed that in case of the cruciform bracket building hardware there were no problems like the big deformation or breakage on the building hardware, but there were cracking and breakage on welded connections of welded building hardware. Also, it was verified that cruciform bracket building hardware followed horizontal displacement of the structure more.