Design of Pre-Stressed Concrete T-Beams

The concept of pre-stressed concrete appeared in the year 1888. In this present engineering technology Durable and sustainable bridges play an important role for the socio-economic development of the nation. Owners and designers have long recognized the low initial cost, low maintenance needs and long life expectancy of pre-stressed concrete bridges. This is reflected in the increasing market share of pre-stressed concrete, which has grown from zero in 1950 to more than 55 percent today. This growth continues very rapidly, not only for bridges in the short span range, but also for long spans in excess of length which, here therefore, has been nearly the exclusive domain of structural steel. Many bridge designers are surprised to learn that precast, pre-stressed concrete bridges are usually lower in first cost than all other types of bridges coupled with savings in maintenance, precast bridges offer maximum economy. The precast pre-stressed bridge system offered two principal advantages: it is economical and it provides minimum downtime for construction. Pre-stressing is the application of an initial load on the structure so as to enable the structure to counteract the stresses arising during its service period. In this present project I am going to know the behavior of pre-stressed concrete beam, how they stressed, percentage of elongation, pressure applied to make beam stressed. This thesis completely going to do in a practical approach that on a major bridge having 299 mts span, 36 no?s of PSC Beams & 8 no?s of RCC Beams. My attempt is on PSC Beams, where the Beam post tensioning values, rate of elongation & behavior can be defined after stressing. The main code that I follow in this course is IS: 1343 ? 2012. The title is Code of Practice for Pre-stressed Concrete. It is published by the Bureau of Indian Standards. Remembering that am expected to know IS: 456 - 2000 which is the Code of Practice for Structural Concrete. Some of the provisions of IS: 456 are also applicable for Pre-stressed Concrete.