非结构件和设备的抗震设计楼面谱

第一代楼面谱将设备与结构解耦，大大方便了设备抗震设计。但因未考虑设备的反作用，所得楼面谱误差过大。文中讨论第二代楼面谱，考虑设备对楼层的质量比不很小时，设备的反作用不可忽视，特别是当设备频率与结构相近（调谐）时影响显著。而且设备阻尼一般不同于结构阻尼，调谐时非经典阻尼的影响明显不同于经典阻尼。用随机振动法建立了由地面反应谱计算设备反应的程序，并针对６座典型高层建筑计算了６００余条楼面谱，从中给出了设计用楼面谱

Design floor spectra for nonstructural components and equipment in buildings

Improved design floor spectra have to include the interaction between buildings and equipment. The interaction is significant when the mass ratio of equipment to building floor is not very small and equipment natural periods are close to those of buildings, i.e., tuning. In the case of tuning, equipment damping different from structural damping(nonclassical damping) has effects that can not be analyzed by methods dealing with classical damping. In addition, the psuedo static effects of multiply supported excitation are also significant. Considering these effects, the paper develops a random vibration based floor spectrum analysis program FSAP. More than 600 floor spectra for 6 different and typical buildings are generated by it. On the basis of them, the design floor spectra for single supported secondary systems are developed.