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학술저널
저자정보
저널정보
대한건축학회 대한건축학회 논문집 - 구조계 大韓建築學會論文集 構造系 第18卷 第12號
발행연도
2002.12
수록면
59 - 66 (8page)

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This study was aimed to evaluate the tensile capacity of damaged butt welding area according to variation of weld defect on structural steel for welding SM 490 A. Weld defects were located on the surlace and in half of the specimens with several sizes through the defect ratio. For the test, AWS E71T grade was used for weld deposit metal with Flux Cored Arc Welding(FCAW) which is the most popular in field under control of Welding Heat Input. Several sizes of ceramic pieces were inserted for making defect into the welds. The influence of the weld defect through the defect ratio variation on welding characteristic subjected to static loading was shown as relation diagrams of the load and displacement, the stress and defect ratio and the load and energy. It was also shown that the distributions of the yield stress, the ultimate strength and the energy range of the specimens according to the defect variation. As the result, both the locations and the area sizes of weld defect have no influence on tension strength within 4% of defect ratio. Otherwise, energy absorbency of surlace defected specimens was more sensitive than the others. According to the summary of variance and regression analysis, defect ratio with surface defect specimens had a close relation to energy absorbency and maximum stress, while inner defect ones had little influence on it.

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Abstract
1. 서론
2. 시험방법 및 시험체계획
3. 시험결과
4. 용접부 평판인장시험결과 및 고찰
5. 분산분석과 회귀분석
6. 결론
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