Experimental study on a new type of bucklingrestrained braces wrapped by GFRP

6th Annual International Conference on Material Science and Engineering

Zhang, Jie^1 ; Peng, Yang^1 ; Dong, Jun^1

College of Civil Engineering, Nanjing Tech University, Nanjing, China^1

关键词: Buckling restrained braces;    Corrosion-resistant;    Deformation abilities;    Deformation capacity;    Energy dissipation capacities;    Glass fiber reinforced polymer;    Hysteretic behavior;    Low cyclic loading tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/397/1/012039/pdf
DOI  :  10.1088/1757-899X/397/1/012039

来源: IOP

【 摘 要 】

This paper proposes a new type of brace, called the maintenance-free steel-composite buckling restrained brace (MFSC-BRB). The inner core of the proposed MFSC-BRB contains a steel plate in which a ribbed glass fiber reinforced polymer(GFRP) rectangular tube is used as a constraint unit. The whole core is encapsulated by the GFRP rectangular tube. Four different specimens were tested using the low cyclic loading test to investigate the failure mode, deformation capacity, and hysteretic behavior of MFSC-BRB The results show that the structural form of the non-filling yield section can effectively constrain the supporting element of the inner core, and the support has stable bearing capacity and excellent energy dissipation capacity. Further, the expansion joint structure has good deformation ability under low cyclic loading. When the axial displacement is large, single wave section expansion joints perform better than double wave section expansion joints. The larger the constraint ratio of the restrained yield section, the better the energy consumption of the brace. Compared with the traditional BRB, the new BRB is more lightweight, corrosion resistant, and has good energy dissipation.