REVIEW PAPER ON ANALYSIS AND DESIGN OF DIFFERENT TYPES OF PRE-STRESSED CONCRETE SECTIONS

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International Engineering Journal For Research & Development

Vol.4 ISSUE 4

Impact factor : 6.03

E-ISSN NO:-2349-0721

REVIEW PAPER ON ANALYSIS AND DESIGN OF DIFFERENT TYPES OF PRE-STRESSED CONCRETE SECTIONS Saurabh Bagade P.G. Scholar Civil Dept, Prof. Ram Meghe Institute of . Technology and Research Badnera Maharashtra, India saurabhbagade111@gmail.com

Prof. S. R. Bhuskade Assistant Professor Civil Dept. Prof. Ram Meghe Institute of Technology and Research Badnera Maharashtra, India shrikantjuly22@gmail.com

Abstract: Pre-stressed concrete is a method for overcoming concrete’s natural weakness, i.e. tension. It can be used to produce beams, slabs, girders for heavy loading, longer span with effectively less depth and are light weight by providing the curved tendons and the pre-compression, a considerable part of the shear is also resisted. Pre-stressed concrete sections are thinner and lighter than RCC sections, since high strength concrete and steel are used. Thinner sections in pre-stressed concrete results in less self weight and hence overall economy. Cracks do not occur under working loads in the pre-stressed concrete sections. Even if a minute crack occurs when overloaded, such crack gets closed when the overload is removed. In this paper analysis and design of different types of prestressed concrete sections using pre-tensioning and post-tensioning methods is reviewed. Pre-stressing removes a number of design limitations that the conventional concrete faces. The deflections of the pre-stressed concrete sections are small as compared to the conventional concrete. Keywords: Pre-stressed Concrete, High Strength Steel, Self weight, Economy, Deflection.

INTRODUCTION In Pre-stressed concrete internal stresses of a suitable magnitude and distribution are deliberately introduced so that the stresses resulting from external loads are counteracted to a desired degree. The normal concrete undergoes compression on the top flange and tension at the bottom flange. In pre-stressing the tendons are stretched along the axis and then the cement is poured. When the tendons are released the compression takes place at the bottom which tries to counter balance the compression due to loading at the top part of the beam. The upward force along the length of the beam counteracts the service loads applied to the member. Prestressed concrete structures are an attractive alternative for long span bridges and have been used worldwide since the 1950s. Savings in the materials and maintenance and life-cycle costs are additional advantages. The extensive application of prestressed concrete to buildings, military constructions and civil infrastructures has been increased by awareness with its principles, practice and further advances in its design and construction. Pre-stressing removes a number of design limitations conventional concrete faces on span and load and also permits the building of roofs, floors, bridges and walls with longer unsupported spans. Due to pre-stressing it is easier to design and build lighter and shallower concrete structures without sacrificing strength. This helps in the construction of longer spans which reduces the intermediate pier construction and making bridge construction economical.

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