How does tension and compression affect a suspension bridge?
Tension forces pull and stretch material in opposite directions, allowing a rope bridge to support itself and the load it carries. Compression forces squeeze and push material inward, causing the rocks of an arch bridge to press against each other to carry the load.
Where is the tension and compression on a suspension bridge?
The main forces in a suspension bridge are tension in the cables and compression in the towers. The deck, which is usually a truss or a box girder, is connected to the suspension cables by vertical suspender cables or rods, called hangers, which are also in tension.
How does shear affect a bridge?
Shear: Shear stress occurs when two fastened structures (or two parts of a single structure) are forced in opposite directions. If left unchecked, the shear force can literally rip bridge materials in half.
How do compression and tension keep a bridge standing?
An arch bridge is a semicircular structure with abutments on each end. The design of the arch, the semicircle, naturally diverts the weight from the bridge deck to the abutments. The force of compression is pushed outward along the curve of the arch toward the abutments. Tension The tension in an arch is negligible.
What keeps bridges from falling down?
They do it by carefully balancing two main kinds of forces called compression (a pushing or squeezing force, acting inward) and tension (a pulling or stretching force, acting outward), channeling the load (the total weight of the bridge and the things it carries) onto abutments (the supports at either side) and piers ( …
How does compression work on a suspension bridge?
This is tension. Compression: Compression is a pressing force that acts on the towers of a suspension bridge as they are acted upon by gravity. Think about springs, as you compress a spring it becomes smaller and the particles get closer together. This is similar as to what force is being exerted on the bridge.
Which is an example of shear force on a suspension bridge?
Forces Acting on a Suspension Bridge. An example of torsion could be wringing a cloth. Shear: Shear forces occur when forces push or pull in opposite directions. This can cause an object to bend or break. An example of shear force can be a tree that is planted to the ground being hit with a strong gust of wind horizontally.
What are the internal forces of a suspension bridge?
Internal Forces: There are four main types of internal forces acting upon suspension bridges; tension, compression, torsion and shear. Tension: Tension is the pulling force that acts on the cables and suspenders of a suspension bridge.
What is the tension of a truss bridge?
Tension: The force of which pulls along the axis of a member, causing failures by ripping apart the members from the gusset plates along the bridge. This force is crucial to keep in mind when building the structure for a truss bridge. Often in diagrams this is represented as the color red.