关键词: 悬索桥, 空缆线形, 成桥线形误差预测, 吊索长度修正

Abstract: Unloaded cable linear form was measured after the erection of common strands of suspension bridge． The vector height of unload cable linear form was amended and compared with the theoretical results． So the causes of error were analyzed． In order to study the influence of unload cable linear form on the main cable linear form of the bridge，a simple method was often used in the engineering practice to predict the main cable sag when the bridge was constructed． The error of main cable linear form is thought to be the same with the error of unload cable linear form． According to engineering practice， an alternative method of prediction of the error was proposed． Appropriate measures are taken to adjust the suspender length so as to ensure the linear form of the bridge meet the design requirements when the bridge is completed．

Key words: suspension bridge, unload cable linear form, prediction of the error of main cable linear form, suspender length correction