Effect of Stiff Hangers on the Longitudinal Structural Behavior of Tied-Arch Bridges

2018 Applied Sciences  
Featured Application: The conclusions of this paper could be useful for practicing structural Engineers, mainly in early stages of the design of arch bridges. Abstract: In the design process of an arch bridge, the designer may decide to stiffen the hangers linking the arch and the deck, usually in order to reduce the internal forces or the deflections. In this paper, the effect of stiffened hangers on the longitudinal in-plane structural behavior of arch bridges is studied. Then, the effect of
more » ... hen, the effect of the stiffness of the hangers and the relevance of the arch-deck relative stiffness are shown. The paper also describes how stiff hangers with a hinge-either at the bottom or the top-combine very high structural efficiency and ease of execution. Once the advantages of stiff hangers are described and a possible drawback is highlighted. The problem may arise for stiffened hangers, as the bending moments near the ends of the deck might become more adverse for symmetrical load cases than for asymmetrical load distributions, as this usually occurs in arch bridges. To address this problem, this paper suggests a novel solution by designing a combination of fixed and pinned hangers, which can be as efficient as a configuration where all the hangers are fixed, while simultaneously reducing the bending moment at the end zones of the deck.
doi:10.3390/app8020258 fatcat:qpedgl33nbfr7kienvnd4soeiu