厦门新机场结构耗能减震设计研究

Study on design method of seismic energy dissipation of Xiamen New Airport structure

结合厦门新机场航站楼指廊工程,研究在复杂框架结构中,通过采用防屈曲支撑减震设计方案来满足结构的抗震性能目标的方法。介绍了本工程的结构体系特点、采用防屈曲支撑的必要性以及防屈曲支撑框架的设计方法。防屈曲支撑框架结构的设计包括构件设计和防屈曲支撑框架结构整体抗震性能分析两大部分内容。作为消能减震构件,防屈曲支撑既能在弹性阶段为主体结构提供抗侧刚度,又能在中震、大震阶段通过自身的滞回耗能为主体结构提供附加阻尼比,减小地震能量。从小震、中震和大震三个阶段,深入分析了防屈曲支撑框架的抗震性能,验证了防屈曲支撑在复杂框架结构中良好的减震效果。

Combined with the project of the Xiamen New Airport terminal corridor building,the seismic performance of the complex structure designed with buckling restrained braces（BRB） was studied.The characteristics of the structural system of the project,the necessity of adopting the BRB and the design method of the buckling restrained braced frame were introduced.The design of the buckling restrained braced frame structure includes two parts：the design method of braces and the seismic performance of the frame structure with BRB.As the energy dissipation component,BRB can provide lateral stiffness for the main structure in elastic stage,but also provide additional damping ratio for the main structure in moderate and rare earthquake stage through its hysteretic energy to reduce the earthquake energy.In the three stages of frequent,moderate and rare earthquake,the seismic performance of the frame with BRB was analyzed.The results show that the BRB has good energy dissipation effect in complex frame structure.