通信机房走线架结构隔震方法的可行性分析

Feasibility Analysis of Seismic Isolation Method on Cable Tray Structure in Communication Room

从隔震角度出发,探讨了隔震措施能否提高某一典型的通信机房走线架结构的抗震性能,在其设备楼板与承重支架间设置铅芯橡胶支座进行隔震处理,利用ANSYS有限元程序对其进行动力时程分析。结果表明:结构第1阶振型的自振周期由2.33s延长至3.59s,有效避开了场地卓越周期;走线架上部在地震作用下的相对变形大幅降低(降幅为58.5%);结构顶部加速度响应及基底地震剪力都有一定程度的减弱(降幅分别为10.4%,36.4%);对走线架结构的隔震处理能够有效提高其抗震性能,隔震措施切实可行。

Basing on the seismic isolation ,seismic isolation technology was taken into account to improve the seismic performance of the cable tray structure for a typical communication room . Taking advantage of seismic isolation technology by setting rubber seismic isolation bears between equipment floor and bearing member .Based on ANSYS finite element software , the dynamic time history analysis was carried out .The results show that the self-vibration period of the first vibration mode is from 2 .33 s to 3 .59 s ,w hich avoids the site predominant period effectively .The relative deformation of cable tray structures on top decreases obviously （the reduction of 58 .5% ） .T he acceleration responses at the top of cable tray and the base shear get a certain degree of decrease（the reduction of 10 .4% and 36 .4% ,respectively） .By adopting seismic isolation technology ,the seismic performance of the construction of cable tray structures can be improved and certain effects have achieved through seismic isolation .