| Title |
Experimental Evaluation of the Concrete-filled Buckling-Restrained Braces Component Capacity |
| Authors |
Kim Dong-Won ; Ju Young-Kyu ; Kim Myeong-Han ; Kim Do-Hyun ; Kim Sang-Dae |
| Keywords |
Buckling Restrained Brace ; Core ; Constraining Member ; Seismic Capacity |
| Abstract |
Unlike other general braces, the buckling-restrained brace causes the inelastic transformation of its central-steel-frame materials, instead of global or local buckling, when it receives a large seismic load. Moreover, it demonstrates sufficient ductile movement, releases a large amount of energy, and shows stable hysteresis movement. It is thus a very efficient system for seismic loads, which explains why it currently stands out among its competitors overseas. However, domestically, it is only beginning to be studied, and only one experiment has been performed on it thus far. It must be subjected to more experiments, and more analytical studies about it must be conducted. The buckling-restrained brace consists of core materials that will support the load, constraining materials that will restrain buckling when the core materials begin to buckle, and unbonding materials that will prevent the core materials from adhering to the reinforced materials. In this paper, a new type of buckling-restrained brace is proposed, and the results of an experiment that was conducted on the aforementioned materials using the loading protocol proposed in the AISC standards are presented. The experiment variables were the sizes of the core materials, the use of high-strength steel materials and general steel materials, and the existence of reinforcement. The results of the experiment were analyzed to prove the efficiency of the buckling-restrained brace. In particular, the brace’s buckling restraint capacity for pressed loads, ductility level, and energy-dissipation capacity were reviewed. |