Study on the Force Transmission Mechanism of Steel-Concrete Composite Segments in Irregular Single-Tower Cable-Stayed Bridges

In response to the complex stress distribution challenges in the steel-concrete composite segments of hybrid beam cable-stayed bridges, this study focuses on the steel-concrete composite segments of the Dianbu River Bridge in Anhui Province. A comprehensive spatial model of the entire bridge was established using ABAQUS for an overall static analysis. The analysis aimed to elucidate the stress distribution within the composite segments, including the concrete, steel plates, and rear compression plates, and to identify the specific load-bearing pathways within the structure. The results of the analysis indicate that the primary load-bearing pathways traverse the steel transition segments, the steel plates of the composite segments, the concrete of the composite segments, and the concrete transition segments, by bidirectional load transfer principles. The construction method of the steel-concrete composite segments of the bridge tower is deemed to be rational, ensuring structural safety and reliability.