http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
鄭榮洙,朴志鎬,姜昇希,吳光男,姜憫圭,金裁承,朴福萬 明知大學校 産業技術硏究所 2005 産業技術硏究所論文集 Vol.24 No.-
Form work is a very important critical path in construction. There have been ample research efforts regarding to types, specifications and productivities. However, no previous research has systematically addressed the formwork in terms of managerial requirements. The purpose of this paper is 1) to investigate the general present status of form works, 2) to analyze a case-study company situatior, 3) and to derive improvement plan for form works.
그라우트 충전식 철근이음의 강도와 연성에 관한 비교분석
金載承,金亨其,朴福萬,劉承圭 明知大學校 産業技術硏究所 2005 産業技術硏究所論文集 Vol.24 No.-
In this study, the tensile strength and ductility of 306 grout-filled splice sleeve specimen were compared and analyzed in order to afford the data for a reasonable and economical design of this system. The experimental variables analyzed in this study were embedment length of reinforcing bars, compressive strength of grout, sleeve geometry, loading pattern and final failure mode of specimen Following main conclusions are obtained: 1) The strength and ductility of grout-filled splice sleeve tends to be improved with increasing compressive strength of grout and embedment length of reinforcing bars, Specially this tendency appears apparent in specimens of bond failure rather than rebar failure. 2) The results of this study show that the sleeve geometries have influences on the bond strength and ductility of grout-filled splice sleeve. 3) It is verified that the tensile strength required in ACI and domestic code is retained when the compressive strength of grout over 700kgf/㎠ is used with embedment length of reinforcing bars over 4.5d and that the tensile strength required in AIJ code is retained in case when the embedment length of reinforcing bars is 0.8 times the rebar diameter longer than in ACI code. 4) It is verified that over 2% ductility is maintained When the compressive strength of grout over 700kgf/㎠ is used with embedment length of reinforcing bars over 4.5d. 5) The ductility of grout-filled splice sleeve tends to be improved with increasing tensile strength of grout filled splice sleeve. Specially this tendency appears apparent in specimens of bond failure rather than rebar failure.
金在勝(Kim Jae-sung) 한국해양비즈니스학회 2004 해양비즈니스 Vol.- No.3
The purpose of this paper is to survey ancient marine trad e in Northeast, Asian Area and present the directions for developing through the economical cooperations among Korea, China an japan in Northeast Asian district. In order to achieve of above purpose, this paper investigated the environments of marine trade and the practices of Changbogo,s marine trade focus on Silla, Tang in China and Japan in the 9th century. The features of Changbogo"s marine trade are as follows: First, geographically, Chanbogo constructed marine trade network linking in Silla, Tang, Japan, in the center of ancient Northeast Asian Areas Second, Types of marine trade is largely today"s intermediary trade Third, his marine trade are depended on the technical improvement of navigation and shipbuilding. These things are also central factors of today"s international trade and they are necessary to open up a new market through the marine trade.