通信设备走线架吊挂系统抗侧性能研究

摘要

基于生命线工程的抗震设防要求，开展了既有通信设备走线架吊挂系统抗侧性能研究。采用理论方法推导了走线架结构吊挂系统的抗侧刚度并建立有限元模型加以验证，提出增加柔性交叉支撑杆以增强吊挂系统抗侧刚度的加固方法。研究结果表明：既有通信设备走线架悬吊结构水平传力路径不明确，抗侧刚度小，其综合抗侧刚度主要由重力恢复刚度决定，吊杆自身的剪切刚度对综合抗侧刚度的影响可以忽略不计，设置吊杆间支撑杆的加固方法可以有效提高既有通信设备走线架的抗侧刚度。%According to the requirements for seismic resistance of lifeline engineering,research on the lateral performance of communication cable tray suspension systems were conducted.The lateral stiffness of communication cable tray suspension systems were deduced by theoretical method and the formulae were verified by finite element method.Flexible X-brace were adopted to strengthen the lateral stiffness of suspension systems.The study results show that the lateral load paths of cable tray suspension systems are not clear and the lateral stiffness of communication cable tray suspension systems is very small.The integrated lateral stiffness is mainly determined by the gravity recovery stiffness while the influence of shear stiffness can be neglected.Excellent lateral stiffness of communication cable tray can be obtained by adding X-brace in span of derricks.