Stress ribbon bridges are innovative structures that elegantly blend aesthetics and functionality. Their defining characteristics include their slenderness and the ability to span large distances without the need for traditional support pillars. These bridges employ a unique technology that integrates the reinforced concrete slab, bearing tendons and prestressing tendons into a single tension system. The concrete slab not only transfers the load but also protects the cables, while prestressing provides stiffness to the structure. Despite the thin cross-section of the superstructure, the foundations are designed to transfer large tensile forces into the surrounding foundation soils. The construction of these structures requires careful planning and precise execution. Unlike many reinforced concrete structures, where the thermal effects of the surrounding environment and the shrinkage and creep of concrete can be practically ignored or taken into account in a simplified way, these structures require comprehensive consideration of these effects. In the thesis, we focused on the research of thermal effects on the behaviour of stress ribbon bridges, with an emphasis on the analysis of the effects of ambient temperature during their construction. Using the Sofistik 2023 software environment we dealt with the stress ribbon superstructures, assuming that they are rigidly supported. We found that the environmental temperature during construction has a significant impact on the displacements of the structure and on its stress – strain state. Research of these effects certainly contributes to a better understanding of such structural systems and helps to ensure their greater safety, stability, and usability in their intended lifespan.
|
