• Proceedings of the KWS Conference
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• 1997.05a
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• pp.81-83
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• 1997

• Proceedings of the KWS Conference
• /
• 1990.04a
• /
• pp.109-111
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• 1990

• Proceedings of the KWS Conference
• /
• 1997.10a
• /
• pp.64-67
• /
• 1997

• Proceedings of the KWS Conference
• /
• 1997.10a
• /
• pp.158-159
• /
• 1997

• Proceedings of the KWS Conference
• /
• 1997.10a
• /
• pp.169-171
• /
• 1997

• Proceedings of the KWS Conference
• /
• 2003.05a
• /
• pp.275-277
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• 2003

• Proceedings of the KWS Conference
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• 1995.04a
• /
• pp.103-109
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• 1995

• Proceedings of the KWS Conference
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• 1990.11a
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• pp.131-132
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• 1990

• Journal of the Korea institute for structural maintenance and inspection
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• v.22 no.1
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• pp.190-198
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• 2018

In recent years, non-welded building hardware has been installed by bolt assembly is used. The non-welded building hardware method can reduce accidents caused by welding, and can be constructed by bolt assembly, which can reduce labor costs and shorten the construction period. However, there is a need for a method to compensate for the occurrence of buckling at the time of construction. The purpose of this study is to evaluate the behavior of joints between steel pipe and fastener and to evaluate the behavior of joints of non-welded and welded hardware frame. As a result, it was found that the foundation steel structure without welded joints was deformed to a rotation angle of member much larger than the allowable interlayer displacement angle 0.01 to 0.02 required according to the seismic load rating in the seismic load resistance system.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.23 no.2
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• pp.34-34
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• 1987

Friction welding has emerged as a reliable process for high-production commercial application with significant economic and technical advantages. But nondestructive test in friction weld was not clearly developed. Therefore the experimental verification is necessary in order to understand the characteristics of the pulse echo effects according to various change in welding conditions. This paper presents a new attempt to detect the bond strength of friction welds by ultrasonic. Instead of looking for a flaw or cracks at the interface, the new approach evaluates the coefficient by reflection which provides a single quantitative indicator involving the acoustic energy reflected at the interface. The objective of this study is to find the relationship between the reflection coefficients and the weld strength. Results of the bar-to-bar friction welding of aluminum to copper and stainless steel and such relationship investigation are presented and interpreted.