铅芯橡胶隔震双槽渡槽设计与动力分析  

Design and Dynamic Analysis of LRB Isolated Flume with Double-through

作　　者：丁晓唐[1] 颜云燕[1] 唐德嘉[1] 

机构地区：[1]河海大学土木与交通学院,江苏南京210098

出　　处：《水电能源科学》2012年第1期96-99,27,共5页Water Resources and Power

摘　　要：结合南水北调中线工程,利用铅芯橡胶隔震技术对双洎河大型双槽渡槽进行隔震设计,采用Housner模型考虑水体与槽身流固耦合作用对其进行有限元动力分析。与非隔震渡槽相比,隔震渡槽的频率大幅降低;随隔震周期的增加,隔震渡槽振型保持不变;槽身底部剪力减小,支座位移增大。等效线性模型计算的地震响应极值大于双线性模型,偏安全。结果表明,铅芯橡胶隔震技术可显著降低渡槽结构的地震响应,且隔震周期越大,降幅亦越大。The seismic isolation technology based lead-core rubber is used to design large flume with two-through by combining middle route of South-to-North water diversion project. And the fluid-solid coupling of the flume is considered with Housner model and it analyzes the finite element dynamic characteristics of flume. Compared with non-isolated flume, the frequencies of the flume decrease obviously. With the increase of seismic isolation periodicity, isolated mode shapes keep the same. The bottom shear of the flume body decreases while the displacement of the bearing increases. The seismic response extremum calculated by linear model is larger than bilinear model and it is safety. The result shows that the seismic response of the lead rubber bearing isolated flume can be remarkably decreased. the longer seismic isolation periodicity is, the larger decreasing range becomes.

关 键 词：铅芯橡胶隔震 双槽渡槽 水工结构 动力分析 隔震周期 

分 类 号：TV672.3[水利工程—水利水电工程] TV312