In this article we will discuss about:- 1. Introduction to Bridges 2. Types of Steel Bridges 3. Truss Components 4. Economic Span 5. Loads. Introduction to Bridges: Bridges are structures meant to support rail road traffic, highway traffic or pedestrian loads across openings or crossings or another set or rail or highway traffic or across any natural or artificial obstacles. [...]
All structures shall be designed for the following lateral wind forces. These forces shall be considered to act horizontally and in such a direction that the resultant stresses in the member under consideration are the maximum. The wind force on a structure shall be assumed as a horizontal force of the intensity specified in the following table and acting on [...]
A bridge is designed to allow slight movement at a support. Usually a provision is made so that movement of 1 mm can take place per 30 m. It is also necessary to make provision to allow for changes in length due to live load stresses. In spans over 90 m long it is necessary to make allowances for expansions [...]