岳阳洞庭湖大桥索梁温差效应下的随机形变规律分析研究

Analysis of Random Deformation Law of Yueyang Dongting Lake Bridge under the Cable Girder Effect of Temperature Difference

摘要: 在不同结构载荷的随机因素中，温度是影响桥梁形变的最主要因素。索梁(塔)温差效应是斜拉桥温度作用之一。引起索梁温差的内因是索与梁在材料组成和几何形状方面的不同，外因是日照的影响。本文以岳阳洞庭湖大桥为例，针对温度效应中的索梁温差效应，对在不同温差下岳阳洞庭湖大桥的主梁以及中塔进行形变规律分析。

Abstract: In the random factors of different structural loads, temperature is the most important factor affecting the deformation of bridges. The temperature difference effect of cable beam (tower) is one of the temperature effects of cable-stayed bridges. The internal cause of temperature difference between cable and beam is the difference of material composition and geometry between cable and beam, and the external cause is the influence of sunshine. Taking Yueyang Dongting Lake Bridge as an example, this paper analyzes the deformation law of the main girder and the middle tower of Yueyang Dongting Lake Bridge under different temperature.