五跨拱桥缆索吊装系统计算

无支架缆索吊装为拱桥施工的常用方法,其中主索为缆索吊装系统中的主要承重受力索,因此,在此系统中对于主索的精准计算就处于相当重要的地位。本文以梧州西江四桥工程为依托,采用抛物线理论的计算方法,计算了在四塔五跨任意工况下的缆索受力状况,并用Visual Basic编写了主索的计算程序。

Unsupported cable-hoisting is a common method for arch bridge construction.The main cable is the main load-bearing cable in the cable-hoisting system.Therefore,the accurate calculation of the main cable is very important in this system.Based on the Xijiang Fourth Bridge Project in Wuzhou,the paper uses the parabolic theory calculation method to calculate the cable stress condition under any four-story and five-span conditions,and writes the calculation program of the main cable with Visual Basic.