连续刚构桥采用屈曲约束支撑减震效果研究

Study on the Seismic Mitigation Effect of Continuous Rigid Frame Bridge with Buckling Restrained Brace

为提升双薄壁墩连续刚构桥梁纵桥向抗震性能,提出在双薄壁墩的2个肢墩之间安装屈曲约束支撑,通过该支撑耗能来提升结构的抗震性能。采用有限元数值模拟分析方法,从BRB布置位置、安装角度、数量、布置方式等方面研究了连续刚构的抗震性能。结果表明,BRB可有效提高双薄壁墩连续刚构桥的纵桥向抗震性能。

In order to improve the longitudinal seismic performance of continuous rigid frame bridge with double thin-walled piers,a buckling restrained brace is proposed to be installed between the two pier piers of double thin-walled pier,and the energy dissipation of the brace is used to improve the seismic performance of the structure.In this paper,the seismic performance of continuous rigid frame is studied from the aspects of BRB location,installation angle,quantity and layout method by finite element numerical simulation analysis method.The results show that BRB can effectively improve the longitudinal seismic performance of continuous rigid frame bridge with double thin-walled piers.