地震作用下建筑抗震支吊架体系的动力放大系数研究

Study on Dynamic Amplification Coefficient of Building Anti-Seismic Hanger System Under Earthquake

以某多层建筑和高层建筑为对象,计算了4种场地类别时不同自振周期的支吊架体系的动力放大系数,并且讨论了场地类别和安装楼层对动力放大系数的影响规律。研究结果表明,抗震支吊架体系自振周期小于0.10s时,动力放大系数均可以忽略,而体系自振周期介于0.1~0.2s时,动力放大系数仍较小,最大值为1.12。此外,场地类别和楼层位置对于动力放大系数没有显著影响。研究结果为建立抗震支吊架地震作用计算的简化楼面反应谱法提供了基础依据。

Taking a multi-storey building and a high-rise building as an example, the dynamic amplification coefficient of the support and hanger system with different natural vibration periods under four site categories is calculated, and the influence of site categories and installation floors on the dynamic amplification coefficient is discussed. The results show that when the natural vibration period of the system is less than 0.10 s, the dynamic amplification coefficient can be ignored, while when the natural vibration period of the system is between 0.1~0.2 S, the dynamic amplification coefficient is still small, the maximum value is 1.12. In addition, the site type and floor location have no significant effect on the dynamic magnification factor. The research results provide a basis for establishing a simplified floor response spectrum method for the calculation of seismic action of seismic supports and hangers.