Advanced Steel Construction

Vol. 6, No. 1, pp. 578-588 (2010)




W.Q. Li 1,*, Y.Y. Chen 1, 2, W. Wang 1, 2, Y.J. Xu 3 and X.D. Lv 3

1 Department of Structural Engineering, Tongji University, Shanghai 200092, China

2 State Key Laboratory for Disaster Reduction in Civil Engineering, Shanghai 200092, China

3 China Northwest Building Design Research Institute, Xi’an 710003, China

*(Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)

Received: 25 February 2008; Revised: 13 October 2008; Accepted: 20 November 2008




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This paper focuses on external diaphragm joint connecting CHS column and H-shaped beam. Quasi-static tests on three cruciform specimens and finite element analysis using PATRAN/MARC were carried out. The width of diaphragm plate is taken as the test parameter. Four types of failure mode were observed: local buckling of CHS column, noticeable shear deformation at joint zone, doglegged deformation of CHS column, as well as crack at the heat affected zone of CHS column. The specimens exhibited full hysteresis loops, but different initial stiffness and ultimate capacity. Analytical results match the test well and are used to comprehend the force transfer mechanisms between beam flange and diaphragm plate.



External Diaphragm Joint, CHS Column, H-shaped Beam, Quasi-static test, finite element analysis


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