Structure
The inclined hangers with multiple intersections make the network arch bridge act like a truss: Only axial compressive and tensile forces. Bending moments and shear forces are very small in network arches.
The hanger arrangement is the heart of every network arch and constitutes the main difference to tied arches with vertical hangers. It is defined by the number of hangers, hanger inclination and hanger distance. An easy possibility to achieve an efficient structure is the application of the radial hanger arrangement, which was developed by Benjamin Brunn and Frank Schanack in 2003. In the radial hanger arrangement the distances between the upper hanger nodes and the angle between hangers and arch remain constant. In order to avoid too long hangers this angle may be increased towards the bridge ends.
Read more about this topic: Network Arch Bridge
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