| Title |
Experimental Study on the Component Capacity of Buckling-Restrained Braces |
| Authors |
Kwon Soon-Ho ; Jang Sung-Jae ; Ju Young-Kyu ; Kim Myeong-Han ; Chung Kwang-Ryang ; Kim Sang-Dae |
| Keywords |
Buckling Restrained Brace ; Component Capacity ; Core ; Constraining Member ; the Unconstrained Area |
| Abstract |
Buckling-Restrained Brace is composed of brace core and constraining member for the purpose of restraing the buckling of brace and providing large inelastic deformation of the member. Constraining member such as steel tube wrap around the brace core prevents the buckling of brace core by means of its flexural resistance, and makes sure that the brace members dissipate a large quantity of energy and form stabilized hysteresis behavior. In this study, to examine the component capacity of the buckling-restrained braces experimentally, the required capacity was determined based on the Recommended Provisions for Buckling-Restrained Braced Frames (AISC, 2005). The parameters of experimental study were the buckling-restraining effect, the thickness of constraining member, the length of reinforcing core ends, and the unconstrained area. It was found that the hysteresis behavior of the buckling-restrained braces was very stable prior to fracture. The length of non-restrained section had a great effect on the flexural strength of the constraining members and the compressive capacity of the braces. It was shown that the ratio of the axial compressive capacity to the yield strength of the steel core was desirable to be 1.5 or greater, which was suggested by Powell (2002). The capacity equation of buckling-restrained braces suggested by Chen(2000) provided the reseaonable predictions. |