Linetype Control for Construction of Long span Steel Cable stayed Bridges

Abstract:

To obtain the construction linetype of long span steel cable stayed bridges accurately, the paper presents a numerical simulation and control technique by taking geometrical nonlinear effects into consideration. Multiple short truss elements are used to model the sag effect of long cables. The simulation of multiple tensioning of long cables is realized by adjusting unstressed length of cables successively. Different activation modes for new generated components are introduced for different purposes that the tangent and parallel modes are suitable for construction process analysis, and the original position activation mode is used for the linetype control analysis. The sparse matrix algorithm is adopted to speed the simulation. The software of construction linetype control simulation for cable stayed bridges, BINAS, is compiled. The computational accuracy and the effectiveness are verified in the example of the Sutong Bridge.