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진공흡착 기술을 사용한 건물외벽 유리창 청소 로봇의 구현
이동광(Dong-Kwang Lee),김명종(Myung-Jong Kim),권순원(Soon-won Kwon),최문식(Mun-Sik Choi),임영훈(Young-Hoon Im),공정식(Jung-Shik Kong),장문석(Mun-Suk Jang),권오상(Oh-Sang Kwon),이응혁(Eung-Hyuk Lee) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.10
본 논문은 건물 외연의 유리창 청소로봇에 관한 것으로, 더욱 세부적으로는 청소 시스템을 갖춘 로봇을 사람이 닦기 힘들거나 위험한 고층건물이나 아파트 등의 실외 유리창에 흡착시켜 청소로봇을 이용하여 실외 유리창을 자동으로 닦을 수 있게 하는 건물 외면의 유리창 청소로봇에 관한 것이다. 진공펌프를 사용하여 유리창에 안정적으로 흡착할 수 있도록 하였고, 블루투스를 이용하여 무선 조종이 가능하도록 하여 사용자가 원거리에서 로봇의 청소를 제어할 수 있도록 하였다.
임우현(Woo Hyun Lim),민병열(Byung Yeol Min),최문식(Mun Shik Choi),김규석(Kyu Suk Kim) 한국강구조학회 1996 韓國鋼構造學會誌 Vol.8 No.2
The problem of large concentrated forces acting over limited areas of concrete is one of frequent occurence in civil engineering design. Steel base plates of stanchions over concrete footing, anchorages in post-tensioned concrete beams, shear keys in composite structures, concrete beams at bearing, bridge bearings over piers, concrete hinges and bearing blocks, beams over walls and concrete columns and pile heads, etc., are a few instances of bearing problems. The experimental studies for bearing strength of concrete were reported so far by previous investigators, and the formulars were recommended in codes of practice of various countries. In this study, the obtained results of the test are presented. The results show that the major testing parameters are the ratio of bearing area to the concrete area and the size of specimen.
합성구조에서 스터트볼트 접합부의 반복하중에 따른 극한내력에 관한 실험적 연구
최문식 단국대학교 1996 論文集 Vol.30 No.-
The main purpose of experimental study is to evaluate the ultimate capacity and behavior of connection through experiments of full scale specimen, when connection that headed stud bolt is used for connecting structural steel and concrete recieve reverse cyclic load of actuator. The experimental result for reverse cyclic load of connection are as follows; 1. The Shear failure of stud brings out because of work hardening of stud. 2. The ultimate capacity of concrete is approximately 30% lower than that of monotonic load. 3. The value of equivalent damping factor is relatively higher, that is, from o.21 to 0.34
建築構造物設計用 風荷重에 관한 硏究 : 남한지방의 速度壓中心으로 with emphasis on velocity pressure of wind load in Korea
崔文植 단국대학교 1989 論文集 Vol.23 No.-
It is the object of this study to complement the unreasonable factor of Velocity pressure of wind in Koran Standard Code and to design the economical structure of building. In 60 meterological station in south Korea is investigated the yearly mean max. wind speed and yearly gust wind speed. With comparison and analysis of regulations of several country on velocity pressure, this paper suggests problems in our regulations. The results obtained are as follows. (1) The 100years return period of mean max. wind speed in our regulations must be seperated the return period of 5, 50, 100 years according to use of building and material of structure. (Table 2) (2) Exposure factor of 4 grades in reasonable(3 grades in our regulations) (Table 6) (3) The four zone of design basic wind speed from 35m/s to 45m/s must be revisoned in five zone from 30/s to 50/s according to return periods and the adjustment of zone is necessary. (Table 5) (4) Because of adjustment of return period, exposure factor and design basic wind speed must be modified Velocity pressure for structural design as (Table 12) and (Table 13)