Experimental Tests of Steel Unstiffened Double Side Joints with Flush and Extended End Plate

• Main Authors: Aleksander Kozłowski, Damian Kukla
• Format: Article
• Language: English
• Published: Sciendo 2019-12-01
• Series: Archives of Civil Engineering
• Subjects: double side steel joints; experimental test; beam-to-column connection; robustness; semi-rigid joints; column loss
• Online Access: http://www.degruyter.com/view/j/ace.2019.65.issue-4/ace-2019-0051/ace-2019-0051.xml?format=INT

Experimental tests of steel unstiffened double side bolted end-plate joints have been presented. The main aim of the conducted tests was to check the behavior of joints in an accidental situation and possibility of creating secondary mechanism, i.e. catenary action in the scenario of column loss. Two types of end plate joints were tested: flush end-plate (FP) and extended end-plate (EP) with different thickness and different number of bolt rows in each. The tests were carried out on an isolated cross beam-column-beam type system until joint failure. During tests the available moment resistance and rotation capacity of bending joints and also values of tension forces in the beam were determined. The joints with extended end-plate have demonstrated higher bending and rotational capacity than flush end-plate. Significant deformation of column flanges, web and end plate were observed. The fracture of bolts was the failure mode of joints. Obtained results of axial force values in beam exceeded standard requirement what confirmed that the joints with unstiffened web column, flush or extended end-plate possess the ability of development the catenary action.