Study on Tensional Countermeasures for

For easily calculating the cable tension force of cable-stayed bridges with parallel strand stayed cables, the cable-stayed bridges were simplified as a equivalent model consisting of serially or parallelly interconnected springs which were employed to instead of bridge elements such as towers, cables, and beams. . For this equivalent model, simplified formulas for calculating the tension force were deduced, and a corresponded calculation process was presented. The comparison of these proposed formulas with other calculation methods showed that the proposed formulas are reliable. A parametric study centralized on the proposed formulas was carried out in order to understand the characteristics of them. The study results suggested that stiffness ratio and tension coefficient had significant effects on the discrepancy of calculation, and the tension coefficient was more sensitive to the discrete discrepancy and total discrepancy of the final cable’s force; equivalent tension has many advantages in practical construction operations, so a reasonable tensional countermeasure should be chosen according to the structural stiffness and the right tension coefficient should be estimated according to the tension range of jack at the same time.