SEISMIC PERFORMANCE OF STEEL BEAM CONNECTED TO CORNER OF SQUARE CONCRETE FILLED STEEL TUBE COLUMNS | ||||
| International Journal of Advances in Structural and Geotechnical Engineering | ||||
| Volume 05, Issue 01, February 2021, Page 47-56 PDF (870.82 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/asge.2021.274719 | ||||
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| Abstract | ||||
| Concrete-filled steel tube (CFST) beam-column joints are susceptible to brittle premature failure due to concentrated local stresses at the tips of the beam tension flange. In order to reduce the outward deformation of the steel tube wall, this paper addresses the influence of setting the steel beam at the corner of the CFST column on the connection performance. Therefore, two specimens represented the details of the common connection and the new proposed connection of exterior joint configuration were sub-assembled and examined experimentally under lateral monotonic loading. Compared with the flexible initial stiffness attained by the common connection, the results showed that the initial stiffness of the proposed connection was relatively rigid up to yielding of the middle region of the width of the beam compression flange under high bearing stresses. The connection strength also increased up to the expected design strength of the connecting beam, while the common connection strength was close to half of the beam design strength. Moreover, after the strength of the beam connection was achieved and at a total rotation of 0.025rad, the failure of the proposed connection was a significant buckling of the beam compression flange propagated to its web and associated with section warping. | ||||
| Keywords | ||||
| CFST; Corner; Experiment; Beam-column joint; Welded; Square; Rigid | ||||
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