Plastic Bending of Portals

Product Description

Description of Plastic Bending of Portals Two portal frames (pitched and rectangular) are mounted within two ground supports, in either a pinned or fixed condition. A proportioning bar is held horizontally by loading chains that run to the Plastic Bending of Portals and to the screwjack loading mechanism (with integral load cell). Depending on the position of the loading mechanism on the proportioning bar depends on the extent of the load being applied either horizontally or vertically. Experimental Capabilities of Plastic Bending of Portals Verifies that hinges occur at positions of greatest bending momentStudies the change in the collapse mechanism as the ratio of horizontal to vertical load is variedDetermines the increase in collapse load as the degree of redundancy increases Specification of Plastic Bending of Portals Studies the collapse mechanism of a portal frame when subjected to simultaneous horizontal and vertical loading; calculating and verifying position of greatest bending moment where plastic hinge is likely to formThe apparatus consists of the test portals, two ground foundations, loading pulley, loading cords, proportioning beam, screw jack loading mechanism and deflection measuring instrumentsThe ground foundations provide for pinned or fixed supports.Two different shaped portal frames supplied, both typically made from 13x3mm black mild steel and with a span of 300mmScrew jack mechanism with integral load cell with output to InterfaceComprehensive technical manual for student and lecturer and text book providedRectangular portal framesSymmetrical gable (Pitched) portal frameMust be used with universal Frame and StandMust be used with InterfaceComprehensive instruction manual provided