• Journal of Korean Society of Steel Construction
• /
• v.15 no.3
• /
• pp.241-250
• /
• 2003

This study, investigated the characteristics of residual stress in weldis composed of similar or dissimilar steels, are investigated byusing 3three-dimensional thermal elasto-plastic FEM analysis. The results showed that for the groove welding of the similar steels, increasedthetensile strength of the steels (POSTEN60

• Journal of the Computational Structural Engineering Institute of Korea
• /
• v.17 no.4
• /
• pp.423-431
• /
• 2004

For the fracture mechanics analysis of cracks in welds of dissimilar steels, residual stress analysis and fracture analysis must be performed simultaneously. The standard definition of the J -integral leads to a path dependent value in the presence of a residual stress field. And unlike cracks in homogeneous materials, a bimaterial interface crack always induces both opening and shearing modes of stress in the vicinity of the crack tip. Therefore, it is necessary to develope a path independent J-integral definition for a crack in a residual stress field generated by welding of dissimilar steels. This paper addresses the modification of the Rice-J-integral to produce a path independent J -integral when residual stresses due to welding of dissimilar steels and external forces are present. The residual stress problem is treated as an initial strain problem and the J-integral proposed for this class of problems is used. And a program which can evaluate the J -integral for a crack in a weld of dissimialr steels is developed using proposed J integral definition.

• Journal of Korean Society of Steel Construction
• /
• v.24 no.6
• /
• pp.711-723
• /
• 2012

Structural tests were performed to investigate the structural performance of concrete-filled steel tube column using different strength steels in their flange and web with high-strength steel HSA800 and mild steel SM490, respectively. The test parameters included the strength of column flange and infill concrete, and effect of concrete infill. Connection between different grade steels were welded using the electrode appropriate for mild steel and verified its performance. To evaluate the behavior of test specimens, eccentric loading tests were performed and the results were compared with the prediction by current design codes. Axial load and moment carrying capacity of test specimens increased with the yield strength of compression flange and weld fracture occurred after the specimen shows full strength. The prediction result for axial load-bending moment relationship and effective flexural stiffness gave good agreement with the test result.

• Proceedings of the KWS Conference
• /
• 2000.04a
• /
• pp.235-238
• /
• 2000

• Proceedings of the KWS Conference
• /
• 2001.05a
• /
• pp.94-97
• /
• 2001

• The Monthly Technology and Standards
• /
• s.49
• /
• pp.65-70
• /
• 2006

• Proceedings of the KWS Conference
• /
• 2000.10a
• /
• pp.110-113
• /
• 2000

• Proceedings of the KWS Conference
• /
• 2002.05a
• /
• pp.188-191
• /
• 2002

• Proceedings of the Korean Society of Disaster Information Conference
• /
• 2015.11a
• /
• pp.152-154
• /
• 2015

본 논문은 유한요소의 일종인 유한대판법(Finite Strip Method)를 사용하여 양단 단순지지된 3차원 다층 원통쉘의 내측과 외측에 받는 하중이 2층 구조(강재/콘크리트) 및 3층 구조(강재/콘크리트/강재)에 미치는 영향과 이종재료인 다층 원통쉘의 최적 상태에 대해 알아본다.

• Journal of the Korea Construction Safety Engineering Association
• /
• s.52
• /
• pp.67-85
• /
• 2011