http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박선치 ( Park Seon-chee ),홍원기 ( Hong Won-kee ),김희철 ( Kim Hee-cheul ),김점한 ( Kim Jeom-han ),이호찬 ( Lee Ho-chan ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.2
In conventional method of supporting soil shuttering wall during excavation a system of struts and walls to provide cross-lot bracing is common in trench excavations and other excavations of limited width. This method, however, becomes difficult and costly to be adopted for large excavations since heavily braced structural systems are required. Other expensive and unsafe situations are expected when temporary struts must be removed for the construction of underground structures. This paper introduces innovative strut systems which can be used as permanent underground structures after its role as brace system to resist earth pressure during excavation phase. Underground structural system suggested from architect is checked against the soil lateral pressures before the analysis of stresses developed from gravity loads. In this technology, retaining wall is installed first and excavation proceeds until the first level of bracing is reached. Braces used as struts during excavation will serve as permanent girders when buildings are in operation. Simultaneous construction of underground and superstructure can proceeds when excavation ends with the last level of braces being installed. These projects demonstrate that technology contributes to the speed as well as the economy involved in construction.
합성보에 적용된 프리스트레싱의 효과에 관한 해석적 연구
정수영,홍원기,박선치,임균택 한국구조물진단유지관리학회 2011 한국구조물진단학회 학술발표회논문집 Vol.2011 No.9
This study includes an analytical investigation of a composite beam consisted of cast-in-place concrete, precast concrete, structural steel and pre-stressed steel. To analyze the behavior of composite beam, depending on application of pre-stressing, a comparative analysis with composite beam which was not applied pre-stressing was conducted. In the comparison, it was found that, when composite beam and steel-reinforced concrete composite beam displayed the similar behavior, the cross-section of the composite beam was more cost-effective to the application of pre-stressing.
매입형 합성보의 전단철근 및 스터드 산정방식에 대한 연구
임균택,홍원기,박선치,정수영 한국구조물진단유지관리학회 2011 한국구조물진단학회 학술발표회논문집 Vol.2011 No.9
The encased composite beam suggested in this paper consists of precast concrete, structural tees and cast-in-place concrete. To unify the behaviors of composite members, shear connectors were installed in the web and the flange of structural tees member respectively. There are no clear criteria available yet for estimation of shear connector quantity to be used in enclosed composite beam. To prevent construction costs from increasing for excessive design of shear connector and ensure rigidity of cross-section by unifying member behaviors, appropriate design for shear connector of encased composite beam is required. Therefore, this paper adopted the concept of shear flow and proposed design formula for dowel bar and stud in reference to required shear force.
매입형 합성보에 대한 스터드의 실험적 거동 및 성능 분석
임균택,홍원기,박선치,정수영 한국구조물진단유지관리학회 2011 한국구조물진단학회 학술발표회논문집 Vol.2011 No.9
As interest in composite structure system increases around the world, it is also witnessing ever more applications as well. Composite structure employes more than two heterogeneous members, which makes it unavoidable to use shear connectors to unify member behaviors. However, clear criteria for such shear connector are not available yet. Therefore, this study attempted to analyze the performance of shear connector used in composite beam having structural tees encased in reinforced concrete. In the analysis, it was found that a stud made significant contribution to unifying the behaviors of reinforced concrete and steel frame and the rate of deformation of stud toward the edge side was relatively higher than the central region of the beam.
정수영,홍원기,박선치,임균택 한국구조물진단유지관리학회 2011 한국구조물진단학회 학술발표회논문집 Vol.2011 No.9
Trends to build higher and lighter buildings have resulted in intensive studies on composite beam. This research aims to locate the neutral axis of pre-stressed composite beam by Strain Compatibility Analysis and analyze it in comparison with changes in the neutral axis of composite beam found in experiment. The analysis has found that Strain Compatibility Analysis predicts neural axis with high proximity in each limit state.
김진민 ( Kim Jin-min ),박선치 ( Park Seon-chee ),홍원기 ( Hong Won-kee ),김희철 ( Kim Hee-cheul ),이호찬 ( Lee Ho-chan ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.2
Environmental issues are concerned growingly in internal and external, therefore decreasing the volume of concrete form and increasing the recycling rate shall be materialized. In addition, the volume of support necessary for formwork shall also be reduced. In general, recycling rate of Euro form, a standardized plywood form, is expected to be reused up to 5 times. The study was intended to secure the semi-permanent recycling rate, using GFRP form, as well as to reduce the support accordingly. In the study, a factory-fabricated form was used for producing the full-sized beam, and the test for hanging the GFRP channel using wire was conducted. As GFRP is light-weight, it required fewer workforce than wooden form or standardized Euro form, and easy and simple form erection enabled to significantly reduce both the construction period and cost. And it’s an environment-friendly erection and removal method to prevent the construction wastes. The study was also aimed at evaluating the hanging method designed to minimize the supports in an attempt to reduce the use of temporary material such as wooden form and Euro form as well as to secure the work space. Therefore, the improvement leaded from the problem occurred in the process of concrete pouring and demolding was suggested.
내화피복공정이(耐火被覆工程)이 생략된 MHS(Modularized Hybrid System) 합성보의 실무적용(實務適用) 사례고찰(事例考察)
이경훈(Lee Kyoung-Hun),박선치(Park Seon-Chee),김점한(Kim Jeom-Han),이호찬(Lee Ho-Chan),홍원기(Hong Won-Kee) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
Generally hybrid beam is classified with embedded and exposure section types. Wide flange steel beam is completely covered by reinforced concrete for embedded hybrid beam. However, exposure hybrid beam connected with horizontal shear stud bolts at the interface of upper flange of wide steel beam and concrete slab. Even if embedded hybrid beam has many structural advantages, exposure hybrid beam is widely used because it can be easily constructed than embedded hybrid beam. There is one major environmental problem still existing for exposure hybrid beam that fire proofing protection process for wide flange beam is necessary. The purpose of this study is to evaluate structural capacity of MHS(Modularized Hybrid System) beam. MHS beam has many advantages such as easy construction, low beam depth, and fire resistance capacity etc. In this study, reduced effect of construction periods and cost of MHS structure were evaluated using actual structural design of a factory building. As a result, about 17% of construction period and cost could be reduced if MHS beam was used instead of RC and steel beam.