How do you make a cable-stayed bridge?

The basics of cable-stayed bridge design are as follows: the vertical loads on the deck are supported by diagonal cable stays that transfer these loads to the towers. At the tower, the horizontal components of the cables from the main span are in balance with those from the side/adjacent spans.

Can you explain how a cable-stayed bridge works?

cable-stayed bridge, bridge form in which the weight of the deck is supported by a number of nearly straight diagonal cables in tension running directly to one or more vertical towers. The towers transfer the cable forces to the foundations through vertical compression.

What is the shape of cable stayed bridges?

The bridge can take many forms in the cables may be equal or unequal on both sides of the tower. The towers may be many shapes but a H, A or an inverted Y shape are the most popular. There may be one or two lines of cables and there is no need for the large anchorages as required in a suspension bridge.

What are the key components of a cable-stayed bridge?

Introduction of Bridge Engineering A cable-stayed bridge is a structure with several points in each span between the towers supported upward in a slanting direction with inclined cables and consists of main tower(s), cable-stays, and main girders, as shown in Fig. 1.24.

Where are cable stayed bridges used?

It usually carries pedestrians, bicycles, automobiles, trucks, and light rail. It is used in places where spans need to be longer than cantilever bridge can achieve (because of its weight), but the span is short enough so a suspension bridge is not practical there economically.

How are cable stayed bridges known to fail?

The dominant failure modes of the suspension bridge are the fracture of suspenders followed by the bending failure of girders. The degradation of suspenders due to fatigue-corrosion damage has a significant effect on the system reliability of a suspension bridge.

How do cable-stayed bridges carry load?

In suspension bridges, the cables ride freely across the towers, transmitting the load to the anchorages at either end. In cable-stayed bridges, the cables are attached to the towers, which alone bear the load. In a radial pattern, cables extend from several points on the road to a single point at the top of the tower.

How are cable-stayed bridges known to fail?

What is the advantage of cable-stayed bridges?

Cable-stayed bridges are far less costly for road-deck lengths of 500 to 3,000 feet (the Bridge Project has a 2,000-foot main span); and they can be built in far less time. They require much less steel cable and use more precast concrete sections, which accelerates construction.

How do cable stayed bridges carry load?

What is the span of the cable-stayed bridge?

The span of the cable-stayed bridge is 50 m+125 m+50 m, and the height of the main tower is 30 m. The following assumptions are adopted to establish the plane truss model of the cable-stayed bridge.

How are cables attached to a bridge?

There have been some recent bridges where the cables pass through a “saddle” at the tower, and then to the deck at each end. The cables are typically in two planes separated by the width of the roadway, though numerous bridges have been built with a central plane of stays between the two opposing lanes of traffic.

How to solve a beam model of the structure?

A beam model is the simplest idealization of the structure, but it doesn’t have any detail about the thickening blocks. It will be necessary to have a solid model of the structure for more detailed analysis. I put 4 springs, one from each corner to a point 60 foot above the center and turned on gravity. It successfully solved.

Why does Ansys create a spider web with finite stress?

When you pick a vertex of a solid body, the stress would be infinite because the area is zero. ANSYS knows this and so automatically creates a spider web of hidden elements from that vertex to nearby nodes to create an area and have a finite stress.