Span Increment Possibility of Self-Anchored Suspension Bridge

This paper aims to indicate the behavior of self-anchored suspension bridge (Pylon-Girder and Cables) for prestressed concrete girder type when the main span increases from 160 meters up to 500 meters while monitoring the impact of this increase on the bridge components, the increment process is done using scaling method as all of the bridge geometrical properties and components dimensional properties are selected relative to the bridge main span which allow for feasible comparison, bridge reference model has been selected in accordance of other bridges geometries which are implemented of the same type and initial calculation was done for the components cross sections to eliminate the possibility of selection errors and choose the most proper sections, the results clarify that the bridge components behavior under dead and live load is linear with increasing the span which mean that the validated dimensions proved to be efficient, the prestressing system is important in order to control the stresses at girder and keep them at allowable range which indicated the difficulty of reaching this limit of spans using a reinforced concrete girder.