PLASTIC DEFORMATION CAPACITY OF H-SHAPED BEAMS REINFORCED BY END STIFFENERS

Abstract

The H-shaped beams reinforced by the horizontal stiffeners at the beam end can be expected improvements in the plastic deformation capacity. The purpose of this paper is to show plastic deformation capacity of the H-shaped beams and to clarify the optimal stiffener shape. For this purpose, authors conduct cyclic loading tests on the several parameters ( length of the beam, thickness of the web and length, width and thickness of the stiffener ), and confirm the distinction of plastic deformation capacity related to the stiffener shape. Furthermore, in addition to the loading tests, by using the numerical analysis and the energy method, authors fix the required rigidity and the required length of stiffeners according to the demanded performance.