中文摘要：

通信机房走线架结构多为吊挂体系,抗侧刚度较弱。地震作用下结构顶部位移响应过大,普遍不能满足生命线工程的抗震设防要求,需要对走线架结构进行抗震加固。针对走线架在地震作用下侧移过大,抗震性能较差的特点,通过走线架下方增加支撑架及吊挂系统增设交叉柔性支撑,提高结构抵御地震作用的能力。利用ANSYS有限元软件,对一案例加固前后走线架建立了整体有限元模型并进行弹塑性时程分析,分析抗震加固后的地震响应,验证加固效果。

英文摘要：

Suspended systems are commonly used for cable tray structures in the telecommunication room.The lateral stiffness is weak.The displacement response of the top of the structure under seismic loading is significant,which generally cannot meet the seismic fortification criterion for lifeline facilities.Therefore anti-seismic strengthening is required for some cable tray structures.Considering the large lateral displacement and poor performance in earthquakes,support frames under cable tray were designed and cross flexible supports for the suspended system were added to improve seismic performances.The finite element models of the whole cable tray before and after strengthening were developed.Elastoplastic time-history analyses were performed to analyze seismic responses to prove the effectiveness of the strengthening strategy in this paper.