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Effect of Plate Arrangment on Behavior of Buttress Connection

Plates arrangement around of top plate buttress connections or side plate buttress connections cause of that panel zone, connection elements and column do not fail or damage and plastic hinge developes in beam. Sampels of such connection are tested at University of Berkely [1]. In this research connections are modeled using finite element method and calibrated with experimental results. Buttress connection with side plates is modelled and investigated in this research. The effect of plates and behavior of the connections are studied using finite element modeling. The results show that in buttress connection with top plate, integrated of top plate, beam, column web stiffener plates and the dominance of the axial force in them behave in the form of a truss and create a rigid region in the connection. Removing of top plate causes panel zone falls 18 percent into plasticity and removing web stiffener of beam causes plastic hinge develops in connection area and panel zone falls 9 percent into plasticity. In buttress connection with side plates an appropriate behavior is observed due to combination of rigid bending stiffness of side plate and column web stiffener. If the bending stiffness is reduced, panel zone falls into plasticity. Using plates at top or bottom of connection causes Plastic strain at edge of beam flange and side plate connection is decreased more than 75 percent.