Design of Reinforced Concrete I Girder and Prestressed Concrete I Girder and their Comparison

Abstract

In a developing country like India every project decision is made primarily on the basis of the cost of the project which is directly proportional to the material required. It is known that construction and infra-structure play a vital role in development of a country and we all know that bridges play an extreme role in the development of infrastructure for any country. The decision to select the type and material of bridge is crucial according to the requirements should we choose a RCC I girder bridge or a RCC box girder bridge or PSC bridge or steel bridge etc.. In this project we have tried to estimate the material requirement of super structures for : 1. RCC I girder bridge 2. PSC I girder bridge The analysis for both the bridges is done manually. The material requirement for both the bridges is done and analysis is performed i.e. why is there a difference in the requirements of the bridge superstructure. In this project we will be designing RCC I girder and PSC I girder bridges of span 18 meters both the bridges are considered of having same environmental conditions so that there is no other factor on which the materials cost will depend. The bridges are of 2 lanes and are having a carriage way width of 7.5 meters. The carriage way width includes only the part of the bridge where the traffic can move. More specifications about the bridges are given further in the report. Since the environmental conditions are kept constant hence the sub structure of the bridge will not play any vital role in the comparison of the materials required.