What is tendon in post-tensioning?
What is tendon in post-tensioning?
Post-tensioning tendons, which are prestressing steel cables inside plastic ducts or sleeves, are positioned in the forms before the concrete is placed. Prestressing simply means that the steel is stressed (pulled or tensioned) before the concrete has to support the service loads.
What is girder grouting?
The purpose of grouting is to provide permanent protection to the post-tensioned steel against corrosion and to develop bond between the Prestressing cables and the surrounding structural concrete. Grouting shall be carried out as early as possible, but generally not later than two weeks of stressing.
How do you bridge a girder?
A girder bridge is a bridge that uses girders as the means of supporting its deck….Girder bridge.
| Two different girder bridges. The top is a plate girder bridge, while the bottom is a concrete girder bridge. | |
|---|---|
| Ancestor | Beam bridge |
| Span range | Short, Medium |
| Material | Iron, wood, concrete |
| Movable | No |
What supports the girder?
A girder (/ˈɡɜːrdər/) is a support beam used in construction. It is the main horizontal support of a structure which supports smaller beams. Girders often have an I-beam cross section composed of two load-bearing flanges separated by a stabilizing web, but may also have a box shape, Z shape, or other forms.
What is post tension?
Post-tensioning is a method of reinforcing (strengthening) concrete or other materials with high-strength steel strands or bars, typically referred to as tendons.
What are the methods to design girder?
Girder Design Procedure:
- Calculate the bending moment to be opposed by the beam with respect to loads and span of the beam. Let the maximum bending moment to be opposed is M, and maximum shear force is F.
- Calculate the suitable measure of modulus of section by the below given formula.
- Select a rolled steel section.