A HYBRID ALGORITHM FOR CABLE FORCE CALCULATION OF CFST ARCH BRIDGES DURING CONSTRUCTION

Zhaohui Chen,∗ Hangxing Sun,∗ Shuixing Zhou,∗ Zengshun Chen,∗∗,∗∗∗ Xuanyi Xue,∗∗ and Yanjian Peng∗∗∗∗

Keywords

Construction monitoring, hybrid algorithm, geometric shape control, arch bridges

Abstract

Concrete-filled steel tubular (CFST) arch bridges are usually constructed by a cable hoisting method, and cable hoisting forces have great effects on its geometric shape. The calculation of cable forces is critical to the control of geometric shape for CFST arch bridges. However, the present calculation methods require large computation and are time-consuming. This paper proposes a new convenient method with a new construction sequence to calculate the cable forces and to improve the accuracy of the control for geometric shape, which is based on the one-time solution of finite element method (FEM) and a hybrid algorithm. The algorithm integrates generalized multiplier method (GMM) and Broyden–Fletcher–Goldfarb– Shanno (BFGS) method. A case study is applied to demonstrate the accuracy and superiority of the proposed construction monitoring and computing method. The results have shown that the maximum deviation between the arch ring’s geometric shape and the ideal shape is 4 mm, which is far less than that calculated by two traditional methods, and the geometric shape curve is almost parallel to the ideal. This study has not only advanced our understanding in cable hoisting construction, but also provided a method that can conveniently and accurately calculate cable forces for CFST arch bridges.

Important Links:



Go Back