Abstract: The main purpose of this paper is to present the work in analyzing free vibration and computing free vibration frequencies of the pedestrian GRP bridge with skew cable stays built in Chongqing Jiaotong Institute with analytical method and energy method. By both methods, the results were in a good approximation and had also been verified by field tests on the GRP bridge.The main frame of the bridge was a box structure made of GRP honeycomb sandwich plates. The local free vibration frequencies of top plates and loagitudenial webs of the box structure had also been calculated and the results were satisfactory.

摘要： 本文主要是对修建在重庆交通学院的斜拉式人行玻璃钢(GRP)桥进行自由振动分析和自振频率的计算。用解析法和能量法解,两种方法所得结果非常接近并为桥的现场实测所验证。桥主体是由玻璃钢蜂窝夹层板构成的箱形结构。我们同时对箱形结构顶板和纵向隔板的局部自振频率进行了计算并获得良好结果。