Pre-stressed Concrete
The main objective of pre-stressed concrete is that to provide enough pre-compression (Compression that is generated by it’s own self weight, not due to any external/working load) in the concrete by tensioned steel reinforcements or cables / wires so that under working condition the concrete experiences no tensile stresses or low tensile strength so that no deformation / cracks is observed on the concrete surface. Pre stressed Bridge Construction Generally, in concrete members the top flange experiences compression & the bottom flange experiences tension, but in pre-stressed concrete the steel wire is subjected to tensile stress & then concrete is poured in the form work. After setting of concrete it is observed that due to the pre-stressing the bottom flange also experiences compression force, which counteracts with the top flange’s compression force. For this advantage the layout of the tendon (Steel wire / cables) is done by Structural Designer in such a way that...