Abstract
In order to study the mechanical properties of large diameter CFST column-beam connection after earthquake, axial compression test was carried out on the connection specimens that experienced low cycle reversed loading. The failure shapes, ultimate bearing capacities and strains characteristics of the connection were investigated. The results show that the improved interior diaphragm CFST column-H-shaped steel beam joints show waist drum failure modes. The column-beam joints still have high axial bearing capacity after cycle reversed loading. The interior diaphragms and linking reinforcing bars effectively restrain the transverse deformation of the steel tube of the connection zone.
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