Optimization of prestressing operations in the design of cable-stayed bridges by applying the Direct Algorithm

A new direct simulation of the cantilever erection method is presented in order to reduce the prestressing operations of stay cables. This new method introduces a direct approach for cable- stayed bridge construction using the cantilever erection method, employing independent finite element models. Prestressing forces are modeled as imposed strains based on the unstressed length concept to ensure the achievement of a specific target state post-construction (objective service stage, OSS). This facilitates faster simulation of the construction process, particularly for steel bridges and the predesign of concrete cable-stayed bridges, and enables direct simulation of construction stages and OSS achievement. The proposed method's efficacy is demonstrated through the analysis of a cable-stayed bridge.