Techno Press

Steel and Composite Structures   Volume 17, Number 6, December 2014, pages 851-865
Experimental study on seismic performance of partial penetration welded steel beam-column connections with different fillet radii
Hanbin Ge, Liang-Jiu Jia, Lan Kang and Toshimitsu Suzuki

Abstract     [Full Text]
    Full penetration welded steel moment-resisting frame (SMRF) structures with welded box sections are widely employed in steel bridges, where a large number of steel bridges have been in operation for over fifty years in Japan. Welding defects such as incomplete penetration at the beam-column connections of these existing SMRF steel bridge piers were observed during inspection. Previous experiments conducted by the authors' team indicate that gusset stiffeners (termed fillets in this study) at the beam-web-to-column-web joint of the beam-column connections may play an important role on the seismic performance of the connections. This paper aims to experimentally study the effect of the fillet radius on seismic performance of the connections with large welding defects. Four specimens with different sizes of fillet radii were loaded under quasi-static incremental cyclic loading, where different load-displacement relations and cracking behaviors were observed. The experimental results show that, as the size of the fillet radius increases, the seismic performance of the connections can be greatly improved.
Key Words
    connection detail; welding defect; cyclic loading; beam-column connection; thick-walled steel member
(1) Hanbin Ge:
Deptartment of Civil Engineering, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku, Nagoya, 468-8502, Japan;
(2) Liang-Jiu Jia:
Advanced Research Center for Natural Disaster Risk Reduction, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku, Nagoya, 468-8502, Japan;
(3) Lan Kang:
School of Civil Eng. and Transportation, South China University of Technology, Wushan RD., Tianhe District, Guangzhou, 510006, China (Former Japan Society for the Promotion of Science Research Fellow, Meijo Univ., Japan);
(4) Toshimitsu Suzuki:
Hiroshima Machinery Works, Mitubishi Heavy Industries, Ltd., 5-1 Ebaokimachi, Naka-ku, Hiroshima, 730-8642, Japan.

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