Generally, cable-stayed bridges are long-span bridges, and their consisting cables have been confirmed as the main load-bearing components. Hence, an accurate evaluation of cable forces is vital to determine the stress state of bridges. Considering the effect of stiffness on cable force and determination of short cable in practical engineering, cable length, slenderness ratio, and characteristic parameters in the existing specification are taken into account via a specific parameter, represented by ξ. The effect of cable stiffness on cable force serves as a variable, which requires further investigations. As indicated by the research results, the effect of the cable bending stiffness on the cable force reduces with increasing the cable length, slenderness ratio, and cable characteristic parameter ξ. For cables under hinged boundary conditions, the stiffness contribution to the cable force reaches more than 5% for cable lengths less than 6.5 m. Under fixed boundary conditions, the stiffness contribution to the cable force exceeds 5% for cable lengths less than 11 m. Short cable determining criteria are proposed according to the analysis results. In addition, the ranges[DK]' values of the cable length, slenderness ratio, and ξ factor of short cables are given. The achieved results suggest that cables less than 11 m in length should be conservatively defined as "short cables". Further, complementary analyses reveal that the cables with a slenderness ratio less than 175, and ξ-factor lower than 23 can be classified as short cables.

To solve the problem of corrosion monitoring for cable-stayed bridges, an accelerated corrosion test is conducted on high-strength galvanized steel wires used in parallel steel wire suspension cables. The corrosion loss rates of test specimens are appropriately compared using the resistance method, and the traditional weighing method and the effect of corrosion products and temperature on corrosion resistance are also analyzed. The main goal is to check the feasibility of the resistance method to monitor and evaluate the corrosion rate of steel wires in engineering applications. The results reveal that the resistance and the weighing methods have similar test results. The average discrepancies between the results of the two methods in pitting and uniform corrosions in order are obtained as 3.8% and 2.5%. Therefore, the resistance method can be regarded as a reliable approach to monitor and evaluate the corrosion rate of steel wires of the suspension cable. The experimental results on the effects of temperature and corrosion products on the corrosion resistance of steel wire specimens indicate that the temperature coefficient of the steel wire specimens before and after corrosion is close to that of ordinary steel with a value of 0.00605. Additionally, the results reveal that the corrosion products do not have a substantial effect on the results of corrosion resistance testing, so the temperature compensation and corrosion calculation in the corrosion monitoring of the cable-stayed bridge can be ignored when using the corrosion sensor.