탄소강 용접접합부의 모재블록전단내력에 관한 실험적 연구

다국어 초록 (Multilingual Abstract)

An experimental study on the ultimate behaviors of the mild carbon steel (SPHC) fillet-welded connection is presented in this paper. Seven specimens were fabricated by the shielded metal arc welding (SMAW). All specimens failed by typical block shear fracture in the base metal of welded connections not weld metal. Block shear fracture observed in the base metal of welded connection is a combination of single tensile fracture transverse to the loading direction and two shear fractures longitudinal to the loading direction. Test strengths were compared with strength predictions by the current design equations and suggested equations by previous researchers. It is known that current design specifications (AISC2010 and KBC2016) and Oosterhof & Driver"s equation underestimated overly the ultimate strength of the welded connection by on average 44%, 31%, respectively and prediction by Topkaya’s equation was the closest to the test results. Consequently, modified equation is required to be proposed considering the stress triaxiality effect and material property difference on the block shear strength for base metal fracture in welded connections fabricated with mild carbon steel.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 실험 개요
• 3. 실험결과 및 분석
• 4. 현행기준식 및 기존 제안식과 실험결과 비교
• 5. 모재파단 용접접합부의 내력식 고찰
• 6. 결론
• REFERENCES

참고문헌 (Reference)

1 조재병, "모재의 두께와 용접치수에 따른 필릿용접부의 강도" 한국강구조학회 18 (18): 331-337, 2006

2 Korean Standard (KS), "Test pieces for tensile test for metallic materials, KS B 0801"

3 Lu, H., "Strength analysis of fillet welds under longitudinal and transverse shear conditions" 43 : 87-106, 2015

4 American Institute of Steel Construction (AISC), "Steel Construction Manual, AISC 325-11"

5 American Institute of Steel Construction (AISC), "Specification for the Design, Fabrication and Erection of Structural Steel for Buildings" 1978

6 American Institute of Steel Construction (AISC), "Specification for Structural Steel Buildings" 2005

7 American Welding Society (AWS), "Specification for Carbon Steel Electrodes for Shielded Metal Arc Welding, AWS A5.1/A5.1M" 2004

8 Korean Standard, "Method of tensile test for metallic materials, KS D 0802"

9 American Institute of Steel Construction (AISC), "Manual of Steel Construction-Load and Resistance Factor Design"

10 Architectural Institute of Korea, "Korean Building Code and Commentary"

11 Architectural Institute of Korea, "Korean Building Code and Commentary"

12 Oosterhof S. A., "Effects of connection geometry on block shear failure of welded lap plate connections" 67 : 525-532, 2011

13 Korean Standard (KS), "Covered electrodes for mild steel, KS D 7004"

14 Topkaya C. A., "Block shear failure of gusset plates with welded connection" 29 (29): 11-20, 2007

15 Birkemoe, P. C., "Behavior of Bearing-Critical Double-Angle Beam Connections" American Institute of Steel Construction 15 (15): 109-115, 1978