Post-rehabilitation Cable Force Adjustment of the Tension Rocker Bearing in a PC Cable-stayed Bridge

Abstract

Taking the maintenance of a PC cable-stayed bridge as the background, a simulation and calculation analysis of construction control was conducted, and the scheme of stay cable force adjustment was optimized using GQJS (Software of Analysis and Designing of Highway Bridges). Bonding of the steel plates and strengthening by external tendons were achieved, and some construction control targets and safety measures for stay cable force adjustment were provided after the rehabilitation of the tension rocker bearing cables. Adjustment steps and methods were also introduced. The corresponding calculations for the service stage of this bridge were presented. Construction monitoring results showed good force distribution of all stay cables; moreover, the alignment of its main girder was improved after stay cable force adjustment. Concrete stresses, displacement at the top of pylons, and forces of tension rocker bearing cables were also considered. The desired structural goals were achieved in the construction control of the stay cable force adjustment, thereby ensuring structural safety.