屈曲约束支撑在某大型高铁车站结构减震中的应用研究

Research on the Application of Buckling Restrained Brace in the Energy Dissipation of a High-Speed Railway Station Structure

高铁车站结构存在扭转不规则和竖向不规则的特点,为了减小刚度突变和结构的地震响应,需要在高铁车站结构中设置屈曲约束支撑(BRB)。以某大型高铁车站站房结构为例,对非减震和减震结构进行了多遇地震下的弹性时程分析和罕遇地震下的弹塑性时程分析,对比分析了减震前后结构的周期、层间位移角、基底剪力、塑性铰分布和屈曲约束支撑的工作状态。结果表明:屈曲约束支撑有良好的减震效果,多遇地震下为结构提供抗侧刚度,罕遇地震下屈服耗能,减少结构的损伤和破坏。

The high-speed railway station structure has the characteristics of torsion irregularity and ver-tical irregularity. In order to reduce the abrupt change in stiffness and the seismic response of the structure, it is necessary to set buckling restrained braces (BRB) in the high-speed railway station structure. In this paper, a high-speed railway station structure was adopted as example. The elastic time history analysis under frequent earthquake and the elastic-plastic time history analysis under rare earthquake were carried out for non-damping and damping structures. The period, story drift angle, base shear, plastic hinge distribution and the working state of buckling restrained braces before and after damping were compared and analyzed. The results show that buckling restrained braces have good damping effect. Buckling restrained braces can provide lateral stiffness for the structure under frequent earthquakes, dissipate energy under rare earthquakes, and reduce the damage of the structure.