Network arches have a tensile and a compressive flange with a web consisting of crossing hangers. Some of the hangers cross each other twice. The network can be seen as a very light, simply supported beam. There is little bending. There is a lot of tension in tie and hangers. The arches are well supported by hangers and wind bracing. Thus the buckling strength of the arch is high as long as few hangers relax. That is easiest to prevent when a concrete tie gives extra weight in the tie. The optimal shape of network arches is discussed. In two lane and two track network arches the biggest bending in the tie is usually the transverse bending half way between the arches. The optimal shape of network arches is discussed at length. The axial force between the ends of the arches is best taken by prestressing cables.


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    Title :

    Network Arches: The World's Lightest Arch Bridges


    Contributors:
    Tveit, Per (author)

    Conference:

    Ninth Asia Pacific Transportation Development Conference ; 2012 ; Chongqing, China


    Published in:

    Publication date :

    2012-06-28




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




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