Ezperimental study on overlapped CHS KK-joints with hidden seam unwelded
Overlapped circular-hollow-section double K-joints, either overlapped in longitudinal or in transverse direction, are widely used in large span structures in China. In practice, the hidden toe of this type of joints is normally left unwelded due to the difficulty resulted from the fabrication sequence. It is thus neces-sary to investigate how the unwelded hidden seam may affect the behaviour of overlapped CHS KK-joints. This paper reports three static tests on multiplanar overlapped CHS KK-joints under axial loading. Among these 3 specimens, one KK-joint is designed to be overlapped in longitudinal direction, and the other two are overlapped in transverse direction, to study the effect of pattern of overlap on the joint behaviour. In order to investigate the effect of the hidden seam on the behaviour of the connection, one specimen with the hidden seam welded were also designed and tested for comparison purposes. Results of these tests show that the pattern of overlap leads to completely different failure mode of the joints; both the pattern of overlap and the welding situ-ation of the hidden seam have significant effects on the joint ultimate capacity. Comparison of the joint capaci-ties obtained from the tests with strength prediction from current design codes was presented.
X.Z.Zhao Y.Y.Chen G.N.Wang
Tongji University, Shanghai, China Shanghai Municipal Engineering Design Institute, China
国际会议
第12届钢管结构国际学术会议(The 12th International Symposium on Tubular Structures)
上海
英文
193-199
2008-10-08（万方平台首次上网日期，不代表论文的发表时间）