双塔斜拉桥自振频率的近似计算

Approximate Calculation of Natural Frequency of Cable-stayed Bridge with Double Pylons

给出了双塔斜拉桥的一阶竖弯频率和一阶扭转频率的近似计算公式。与传统方法或规范公式相比,推荐的近似计算公式精度更高,并且能适用于大跨度、超大跨度斜拉桥,从而为这类斜拉桥的初步设计、方案比选、校核有限元结果提供了一种更为快捷有效的依据。

This paper provides some approximate calculation formula for first order frequency of vertical bending and torsion of cable-stayed bridge with double pylons. Compared with traditional methods or formula of design specification, the results derived from recommendation formula in this paper are more precise, and also suitable for super long-span cable-stayed bridge. The research results could be an rapid and effective basis for preliminary design, scheme comparison and selection, verification of finite element analysis results of cable-stayed bridge.