アルミニウム合金製BRBの低サイクル疲労特性

抄録

Previous performance tests of buckling-restrained braces (BRBs) with grade A5083P-O aluminum alloy have revealed that th e performance is inferior to steel BRBs with the identical configuration. This is due to the adverse effects of A5083P-O aluminum alloy, such as (1) large cyclic strain hardening, an d (2) decrease in low-cycle fatigue life due to welding of end ribs. In this paper, a new bolt-assembled aluminum alloy BRB with the similar configuration is proposed to avoid the adverse effects of the welding. A series of low-cycle fatigue tests have been conducted and the results show that bolt-assembled BRBs exhibit stable and excellent hysteretic properties.