http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 주제어 : Rectangular CFT (검색결과 6 건)
- 무료
- 기관 내 무료
- 유료
-
고강도콘크리트 충전 각형강관기둥의 내력평가에 관한 연구
심종석,한덕전 한국구조물진단유지관리공학회 2011 한국구조물진단유지관리공학회 논문집 Vol.15 No.1
두께가 얇은 강관을 사용한 CFT기둥은 강관의 국부좌굴에 대한 구속효과로 내력상승을 기대할 수 있으므로 폭두께비가 작은 강관 CFT기둥에 비해 경제성을 확보할 수 있다. 본 논문의 목적은 각형 CFT기둥에 대한 기존 설계식의 타당성을 입증하고, 내력 증대에 따른 강관 폭두께비의 사용성 한계를 확인하고자 하였다. 실험의 주요변수로는 강관의 폭두께비, 콘크리트 각주의 높이 및 콘크리트 충전 유무로 하였다. 실험결과, 고강도 콘크리트를 충전한 박판의 각형강관기둥에서 충전콘크리트의 압축내력에 대한 강관의 구속효과가 크게 나타났으며, 비선형 해석에 따르면, 실험결과에 의한 내력은 전체 CFT단주 실험체에서해석값보다 다소 크게 나타남을 알 수 있었다. The CFT columns used in thin-walled steel tubes can be more economical, because it was expected the increase of strength by restriction for the local buckling of steel tubes. The purpose of this paper is to review feasibility of existing design formula and verify the applicability limit of width-to-thickness ratio for increasing the strength of rectangular CFT columns. As the main parameters of experiments, width-to-thickness ratios of steel tube, height of rectangular concrete columns, and concrete filled or not. The strength of concrete are selected to 90MPa. From the test results, the confinement effect of steel tube on the compressive strength of infilled concrete is remarkably appeared in the thin-walled rectangular steel tube columns infilled wih high strength concrete. By the non-linear analysis, the axial strength from experiment result was given higher than analysis result for all CFT stub columns.
-
콘크리트 강도 및 강관 폭두께비에 따른 각형 CFT 단주의 내력평가
심종석,한덕전 한국디지털건축·인테리어학회 2011 한국디지털건축인테리어학회 논문집 Vol.11 No.2
Concrete-filled steel tube(CFT) columns have become popular for building construction due to not only composite effect of steel tube and infilled concrete, but also more economical. The purpose of this paper is to propose the applicable boundary formula of width-to-thickness ratio for rectangular steel tube as using CFT column. A parametric study was performed taking width-to-thickness ratio of rectangular steel tube and compressive strength of concrete as the main parameter. The strength of concrete are selected to 30, 60, 90MPa. The non-linear analysis was adopted in order to take into account the effect of concrete strength. Finally, from the test and analysis results, the effect of increasing strength according to concrete strength and width-to-thickness of steel tube and plastic behavior of specimens were verified distinctly.
-
충전성을 개선한 각형CFT구조의 기둥-보 접합부 구조적 거동
박제영,이명재 대한건축학회 2012 대한건축학회논문집 Vol.28 No.11
<P> Concrete-Filled Tube is a concrete-filled steel tube structure. Steel tube confines the concrete to increase the compressive strength, and the concrete contains the buckling of the tube. CFT structures require a diaphragm to prevent buckling of steel at connections. An outer diaphragm has better concrete filling than a through diaphragm due to a large bore, but being larger than the through diagram, it has poorer constructability and cooperation with building equipment. In this study, a rectangular CFT structure that uses different types of diaphragms in its upper and lower connections to improve the concrete filling was tested and analyzed via the FEM program. The building structure had a floor slab that was unified with the upper diaphragm, so the outer diaphragm was placed at the upper bound. Moreover, the through diaphragmwas placed at the lower connection to avoid obstruction frombuilding equipment. The CFT structure with the improved concrete filling showed the same structural behavior as the CFT structure with the use of the same type of diaphragms at the upper and lower connections.</P>
-
충전성을 개선한 각형CFT구조의 기둥-보 접합부 구조적 거동
박제영(Park, Je-Young),이명재(Lee, Myung-Jae) 대한건축학회 2012 大韓建築學會論文集 : 構造系 Vol.28 No.11
Concrete-Filled Tube is a concrete-filled steel tube structure. Steel tube confines the concrete to increase the compressive strength, and the concrete contains the buckling of the tube. CFT structures require a diaphragm to prevent buckling of steel at connections. An outer diaphragm has better concrete filling than a through diaphragm due to a large bore, but being larger than the through diagram, it has poorer constructability and cooperation with building equipment. In this study, a rectangular CFT structure that uses different types of diaphragms in its upper and lower connections to improve the concrete filling was tested and analyzed via the FEM program. The building structure had a floor slab that was unified with the upper diaphragm, so the outer diaphragm was placed at the upper bound. Moreover, the through diaphragmwas placed at the lower connection to avoid obstruction frombuilding equipment. The CFT structure with the improved concrete filling showed the same structural behavior as the CFT structure with the use of the same type of diaphragms at the upper and lower connections.
-
각형 콘크리트 충전강관기둥의 단면형태별 축압축강도 설계식 분석
홍건호(Hong, Geon-Ho),최인락(Choi, In-Rak),정경수(Chung, Kyung-Soo) 대한건축학회 2014 大韓建築學會論文集 : 構造系 Vol.30 No.11
The purpose of this study is to analyze the axial load capacity equations for rectangular CFT columns in the AISC 360-10(the US design code for structural steel buildings) which is being investigated as a revision of Korean Building Code. Main parameters were the width-to-thickness ratios of composite member and material strength as 30∼100MPa of concrete compressive strength and 325∼725MPa of yield strength of structural steel. The first method of changing width-to-thickness ratios was to fix the thickness of structural steel to 5mm and to increase the size of member. The second method was to fix the size of member to 620mm×620mm and to change the thickness of structural steel. The analysis results indicated that axial load capacity used higher strength steel is lower than the capacity used lower strength one in some regions although the section size was equal. The reason of this result is due to the different section type that is classified by the equation of limit width-to-thickness ratios. When the yield strength of structural steel become higher, its section type and axial load capacity equation is changed though its width-to-thickness ratio is the same with the lower yield strength members. The region of this phenomenon is become wider following to the increase of concrete compressive strength because part of concrete load capacity is govern the total load capacity of members. To resolve this irregular phenomenon that axial load capacity is reversed in some region, it is necessary to modify the code provision for calculation the load capacity in high strength materials.
-
충전각형강관기둥에서 콘크리트와 강관의 부착응력에 관한 해석적 연구
박성무,강주원,김원호,이형석 한국공간구조학회 2002 한국공간구조학회지 Vol.2 No.4
An analytic study on the bond stress between steel tube and concrete in concrete filled steel(CFT) rectangular column is presented in this paper. Recently buildings need members which are enhanced durability and ductility. Concrete filled rectangular column system is proposed as alternative plan. In this paper, ABAQUS/Standard Version 5.8 which is identified as usefulness for finite element analysis and has various element library is used. The variables in this study are the location and type of shear-connector. The modeling on contact problem practiced by Contact Pair and Contact Pressure method. In the step of physical bond, it is practiced by Change friction option After yielding of models, analytic results is less than that of experimental results.
ScienceON
코리아스칼라연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
