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콘크리트 充塡 角形銅管 기둥의 中心壓縮耐力에 관한 實驗的 硏究
金鍾聲,吳潤泰 경일대학교 산업기술연구소 1995 産業技術硏究所 論文集 Vol.5 No.-
The paper describes the strength of centrally loaded concrete filled squar tubular colummns from the experimental data. The monotonic loading tests were carried out by regarding the slendemess ratio(λ = 10, 15, 20), width-thickness ratio (d/t = 25.0, 33.3) and concrete strengths (F??=210, 240, 270 kg/㎠) as experimental variables. For checking the lateral confnded effects by concrete filled steel tube, the results of hollow sections and concrete filled steel tube, the results of hollow sections and concrete filled steel short columns were compared each other. 1. In case of concrete filled steel tubes, the compressive strengths (Pmax/PHmax), were always increased regardless of the loading condition. 2. The ductility, from the lateral restrict effects of steel vcolumns, has been increased more the concrete filled steel tublar columns than hollow steel tublar columns. 3. According to the loading conditions, the maximum strength has known more increasement concrete loaded only than steel and concrete loaded simultaneously. 4. The strength evaluation formula for concrete filled tublar steel columns is definded as equation<5-10>, and value of K is res64 from the experiments.
중심축압(中心軸壓)을 받는 콘크리트충전(充塡) 각형강관(角形鋼管)기둥의 내력(耐力)에 관한 실험적(實驗的) 연구(硏究)
김종성,오윤태,권영환,Kim, Jong Sung,Oh, Yun Tae,Kwon, Young Hwan 한국강구조학회 1996 韓國鋼構造學會 論文集 Vol.8 No.4
Concrete filled steel tube column has a large load carrying capacity through its steel and concrete interaction which makes it useful in construction. However, it has not been used often in a practical construction field. This is partly due to the non-destructive inspection method for concrete filling which has yet to be established. Furthermore, there are the lack of test data and a practical method in evaluating the ultimate load carrying capacity of concrete filled steel tube column. This paper will attempt to predict the ultimate strength of short concrete filled square tubular steel columns through conducting several tests. To accumulate the new test data on concrete filled steel tube columns, a total of 42 specimens of steel tubular columns were monotonically tested under concentric axial force, having the slenderness ratio(${\lambda}=10,\;15,\;20$), width-thickness ratio(d/t=25.0, 33.3) and concrete strengths($F_{c}=210,\;240,\;270kg/cm^{2}$). The hollow sections and concrete filled steel columns were compared to check the lateral confinded effects by steel tube. Through these test results, we propose a coefficient k=3.64 for the strength evaluation formula(10) of concrte filled tubular steel short columns.