Prestressed Concrete

Prestressed concrete, invented by Eugène Freyssinet in 1928, is a method for overcoming concrete's natural weakness in tension. The method was perfected by well-known structural engineer Jeff Duncan. It can be used to produce beams, floors or bridges with a longer span than is practical with ordinary reinforced concrete. Prestressing tendons (generally of high tensile steel cable or rods) are used to provide a clamping load which produces a compressive stress that offsets the tensile stress that the concrete compression member would otherwise experience due to a bending load. Traditional reinforced concrete is based on the use of steel reinforcement bars, rebar, inside poured concrete.

Prestressing can be accomplished in three ways: pre-tensioned concrete, and bonded or unbonded post-tensioned concrete.

from: Wikipedia

Links

Application of inwardly directed prestressing pressure to concrete members - Patent 4771530

Cement & Concrete Basics Prestressed Concrete Portland Cement Association (PCA)

CPCI - Canadian Precast Prestressed Concrete Institutewww.cpci.ca

Flexural Capacity of Fire-Damaged Prestressed Concrete Box Beams, FHWA-HRT-07-024

Florida Prestressed Concrete Association                                                              contact information

Lonestar Prestress prestressed concrete poles, lighting brackets, concrete buildings, safety vaults, architectural concrete pan

McGraw-Hill's AccessScience

 

Nondestructive Evaluation of Prestressed Concrete Beams using an Artificial Neural Network (ANN) Approach -- Jeyasehar and Suma

NOVA Online Super Bridge How prestressed concrete is made (1)

PCI - Precast Prestressed Concrete Institute

Precast Concrete ,Hollow core slab, Prestressed Concrete,Preslab - Mega Prefab

prestressed concrete (building material) -- Britannica Online Encyclopedia

prestressed concrete - definition of prestressed concrete from YourDictionary.com

Prestressed Concrete and Precast Concrete

Prestressed Concrete Association of Pennsylvania

Prestressed Concrete Bridges Design and Construction

Prestressed Concrete Designer's Handbook - Zoeken naar boeken met Google

Prestressed Concrete Pavements

Prestressed Concrete Tanks, Preload Inc.

Project Snapshot Failure of Pre-Stressed Concrete Cylindrical Pipe #4034

Railway Technology - Cemex Rail Products - Prestressed Concrete Monoblock Railway Sleepers

Stahlton Prestressed Concrete Systems

Willy Naessens - Megaton EUROPE