悬索桥施工猫道的动力特性分析

Dynamic Behaviour Analysis for Catwalks of Suspension Bridges

描道是悬索桥主缆施工过程中作为施工人员工作平台和通道的一种临时性结构，其动力特性是进行气前稳定性分析的基础据此，介绍了猫道振动特性的分析方法，给出了基频的理论计算公式和实用近似计算公式,然后以虎门大桥猫道为例，分析了猫道的动力特性，并将理论计算结果和有限元分析结果进行了比较。

The catwalk, a temporary falswork during the erection of main cables of suspension bridges, is a slender structure, and sensihve to wind. In this paper, an approach is indriuced to analse the catwalks' dyndric behaviour.Accouling to the charaters of catwalks, the practical formlas are given for calculating the haencies of catwalks approximately. Furthermore, parametric analsis is conducted for investigahng the influence of design paramters (such as sag - span ratio and forces of winthesistant cables).