摘要
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。
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.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1997年第6期82-86,共5页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金
关键词
楼面谱
抗震设计
设备
非结构件
高层建筑
tuning
nonclassical damping
floor spectra
multiple supports
