Although concrete was used for a long time as a construction material, it was not comparable with steel, stone wood at all, because despite its high pressure resistance, it acts weakly when facing tensile stress. As a result, it was only used as a masonry material.
concrete tensile pressure
Later, engineers applied a combination of reinforcing steel and concrete which resists tension and tensile pressure in order to get over this problem. They applied bar to reinforce concrete in early stages. However, they applied pre-stressed technology later in order to change concrete as one of the most efficient construction material. The idea of pre-stressing was presented in first decade of 20thcentury and a variety of research was done during 1930 to 1940. This method has been applied since 1955 in various construction fields.
Theory of Pre-Stressing
Pre-Stressing refers to imposing permanent compression force before imposing service loads in order to reduce and/ or remove tensile stresses. Locating pre-stressing steel and anchoring it in both sides of the member creates constant (compression stress) in concrete section. ...
- Larger Span
- Thinner Slab
- Beams Elimination
- Controlling Cracks and More Durability
- Increasing Execution Speed
- Shorter Deck to Deck Height and Total Reduction of Building Height
- Agancy Agreement with CB Trafilati from Italy Written on Wednesday, 03 August 2016 08:00 Read more...
برگزاری سمینار سیستمهای پیشتنیده در مشهد
در روز سیام اردیبهشت ماه سال 1395، سمینار تخصصی «نقش سازههای بتنی در توسعه پایدار» در شهر مشهد برگزار گردید. در این سمینار که توسط آقای دکتر توافقی از طرف…Written on Saturday, 06 August 2016 09:06