How does a Warren truss distribute forces?
The Warren Truss uses equilateral triangles to spread out the loads on the bridge. This is opposed to the Neville Truss which used isosceles triangles. The equilateral triangles minimize the forces to only compression and tension.
Is the Warren truss strong?
This configuration combines strength with economy of materials and can therefore be relatively light. The girders being of equal length, it is ideal for use in prefabricated modular bridges. It is an improvement over the Neville truss in which the elements form isosceles triangles.
What is a Warren truss used for?
The Warren truss is perhaps the most common truss for both simple and continuous trusses. For smaller spans, no vertical members are used lending the structure a simple look. For longer spans vertical members are added providing extra strength. Warren trusses are typically used in spans of between 50-100m.
How do you identify zero force members?
If a joint has only two non-collinear members and there is no external load or support reaction at that joint, then those two members are zero- force members. In this example members DE, DC, AF, and AB are zero force members.
What is good about a Warren truss?
One of the main advantages of a Warren Truss is its ability to spread the load evenly across a number of different members; this is however generally for cases when the structure is undergoing a spanned load (a distributed load).
How are Warren bridges built?
1) The bridge is built with cast iron side bands, rods, or plates, inclined towards each other, and combined so as to form a series of Vandykes [V shapes]. They are bolted at top to horizontal compression rods, and at bottom to horizontal tension rods, and carry a roadway at top or at bottom, or at both.
Why are Warren trusses good?
What are the pros and cons of truss bridges?
A truss bridge requires high levels of ongoing maintenance. Truss bridges may provide high levels of support, but the additional components and connections of the bridge mean it requires high levels of maintenance as well. Every part of the bridge plays an important role in how the span functions.
What is a Warren truss with verticals?
Warren truss contains a series of isosceles triangles or equilateral triangles. To increase the span length of the truss bridge, verticals are added for Warren Truss. Pratt truss is characterized by having its diagonal members (except the end diagonals) slanted down towards the middle of the bridge span.