Experimental investigation of FRP-strengthened tubular T-joints under axial compressive loads

FRP wrapping for the rehabilitation of Circular Hollow Section (CHS) tubular steel connections

“…The intention of the present paper which serves as a companion paper is to provide all the non-presented details and results of the above experimental and numerical research program [29]. It has exclusively presented the results for Y-joints including the load-displacement/ovalization diagrams, chord surface displacements and FRP failure mechanism not addressed in the previous work [28,29].…”

“…Cracked cross-beam T-connections made of thin-walled rectangular hollow sections (RHS) and square hollow sections (SHS) have been repaired with Carbon Fiber-Reinforced Polymer (CFRP) sheets [26]. Previous studies conducted by the authors on tubular connections/joints have proved to be promising in viewpoint of rehabilitation and reinforcement [27][28][29]. The concept of reinforcing steel tubular joints with FRP material and its effectiveness for such purposes through FEM investigations for a T-joint made out of Circular Hollow Sections (CHS) under axial compression has been presented [28].…”

“…It has exclusively presented the results for Y-joints including the load-displacement/ovalization diagrams, chord surface displacements and FRP failure mechanism not addressed in the previous work [28,29]. Emphasize is made on all other relative details and findings such as aspects of modeling the material and relevant interfaces, commentary on specimen and experiment set-up, stress-strain behavior of the steel and FRP, failure criteria satisfaction for the FRP and steel, experimental readings and numerical results together with the pertinent interpretations and comparisons.…”

“…As an extension to the above research work, an experimental program was designed and conducted on tubular joints. The outcome of applying FRP material on Tjoints made of circular tubes which had undergone experimental investigations as well as numerical justification was reported [29].…”

Structural behavior of tubular T/Y-joints with collar plate under static in-plane bending

“…Also, they established an equation for estimating the ultimate strength. From the studies conducted on the CFRP strengthening system [24,25], it was indicated that significant strength increase could be achieved with this method. Their result indicated that the ultimate strength of reinforced joints subjected to brace compression can be up to 170% to that of the unreinforced joints.…”