Abstract
A stressed ribbon bridge (also known as stress-ribbon bridge or catenary bridge) is a tension structure which is very similar to suspension bridges. The suspension cables form the part of the deck which follows a inverted catenary between supports. The ribbon is stressed such that it is in compression, which increases the stiffness of the structure where as a suspension spans tend to sway and bounce. The supports in turn support upward thrusting arcs that allow the grade to be changed between spans where multiple spans are used. Such bridges are typically made RCC structures with tension cables to support them. Such bridges are generally not designed for vehicular traffic but where it is essential, a certain degree of additional stiffness is required to prevent excessive flexure of the structure. A stress ribbon bridge of 45 meter span is modelled and analyzed using ANSYS version 12. For simplicity in importing civil materials and civil cross sections, CivilFEM version 12 add-on of ANSYS was used. A 3D model of the whole structure was developed and analyzed and according to the analysis results, the design was performed manually.
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