Analysis of a Cable Stayed Suspension Hybrid Bridge Considering Vehicular Loading Using CSI

Abstract

Cable-stayed bridges are built for providing connectivity over obstacles such as rivers, mountains, flyovers over rotary squares and valleys for a long span. Cable stayed bridge provides ample stability and utilises structure material and further its advantages goes in for cheap maintenance and design. Design of the bridge is highly dependent on its function and purpose and the nature of terrain of the site.
A bridge type known as a suspension bridge has its deck suspended by vertical suspenders and suspension cables. The main structural elements of a suspension bridge system are stiffening girders/trusses, main suspension cables, main towers, and cable anchorages at each end of the bridge. Vertical suspenders sustain the weight of the deck and the traffic load, while the main cables are stretched between towers and eventually connect to the anchorage or the bridge itself. The superstructures of suspension bridges are constructed utilising the cable erection technique similarly to other cable-supported bridges.
The primary load-bearing parts are the main cables, which are tension members made of high-strength steel. Buckling is not a concern because the main cable's full cross-section is very effective at moving weights. As a result, the deadweight of the bridge can be greatly decreased, enabling a longer span. Suspension bridges also look better than other types of bridges when compared to their appearance.
The ease of both a suspension bridge and a cable-stayed bridge is offered by a hybrid bridge. The main objective of this research is to examine the behaviour of three cases—a cable-stayed bridge, a suspension bridge, and a cable-stayed suspension hybrid bridge—under similar loading situations. CSI Bridge's analytical programme is used to model and analyse the three situations while taking seismic loading and vehicle loads into account.