Earticle

본 연구에서는 ABAQUS 프로그램을 이용한 유한요소해석에 의해 콘크리트충전 각형강관(CFT)기둥의 내화성능을 평가하는 것을 목적으로 한다. 과도상태 열전달 해석을 이용한 변수요소의 연구결과를 제시하고, 제시한 변수요소 연구의 정확성을 확인하기 위하여 기존 연구결과들과 비교하였다. 내화피복의 두께, 강재의 두께, 단면의 형상, 콘크리트의 강도 그리고 온도 측정위치 변화와 같은 다양한 변수연구로 내화피복된 CFT기둥의 내화성능을 평가하였다. 연구 결과로, 내화피복의 두께가 두꺼울수록 온도저감효과가 더 크게 나타났다. 그러나, 강재두께와 콘크리트의 강도의 영향은 내화피복된 CFT기둥의 온도변화에 영향을 미치지 못한다.

The objective of this research is to evaluate the fire resistance of concrete-filled tube columns(CFT) by finite element results using ABAQUS package program. This paper presents the results of a parametric study using transient heat transfer analysis, and compare these results with the existing results to check the accuracy of the proposed parametric studies. The parametric analysis which includes thickness of the fire protection, thickness of the steel, shape of the cross-section, strength of the concrete, and position of measurement of the CFT column with fire protections for the fire resistance performance evaluation was carried out. As a result of this study, the thicker thickness of the fire protection the better temperature reduction effect showed. However, The effect of thickness of steel and the strength of the concrete may not influence on the temperature change in the CFT column with fire protections.

Tension tests of half-thickness concrete containment wall elements and material tests were conducted to derive a crack pattern and constitutive law of concrete. Main test variables are reinforcement ratio and the applied load ratio in two direction, and its effect on the behavior of reinforced concrete panel subjected to biaxial tension is investigated. Based on the test results, analytical expression is derived for the stress-strain relationship of concrete in tension. Ultimate analyses of reinforced concrete panels are carried out by a general purpose structural analysis computer program(ABAQUS), and its results are compared with the test results. The present analysis focuses on the effects of pre-analysis prior to test of specimens. These ultimate tensile analyses as pre-analysis are essential and important to design an effectual scheme of test.