Cyclic behavior of buckling-restrained brace members - numerical study and experiment

This study is aimed at developing a simple analysis model which can predict the cyclic behavior of buckling-restrained braces. For this purpose, the brace characteristics and elasto-plastic behavior under monotonic and cyclic loading are investigated by means of FEM analysis. The results of the cyclic analysis are compared with experimental data. As a result, core plate behavior that the fundamental mode is moved to higher modes owing to contact with mortar, is reproduced and it is found that buckling does not occur. Cyclic loading analysis shows that the brace has stable load-displacement relation in both the tension and compression fields and the results are well agreed with experimental results.