Design Continuous Simply Supported Prestressed Concreate Beam

Added on - 28 May 2020

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Table of ContentsIntroduction:..........................................................................................................................................1Project Description:...............................................................................................................................1Literature review...............................................................................................................................1Summery:..............................................................................................................................................6References.............................................................................................................................................71|P a g e
Introduction:Objective:“To design continuous simply supported prestressed concreate beam “DefinitionTo design simply supported prestressed concrete beam which supported by two spans. Thebeam carries 120 mm thick with concrete slab which have nominal live load 25 kN/m.length of each span 16 m, effective width 860 mm. to discuss the suitability of beam sectionfrom standard I-Girder sections. Obtain the prestressed force and eccentricity.Project Description:Literature reviewPrestressed concrete is the fundamental concrete in which internal stress through suitabilitymagnitude and distribution are obtain. The resulting of prestressed is to obtain desire degreeof beam. Materials are used for preparing prestressed concreate beam such as concreate,cement and steel. Also, beam strength depends on the grade of concreate and steel, highergrades means more durable and good strength. In case fully prestressed beam, the beam isfree from tensile stress at working condition. Dead weight may counter balance througheccentric prestressed load. The prestressed is effective for shear force due to compressionand eccentric load.The prestressed compressed applied at the axial or eccentric loading situation and stressinduce due to external load below the neutral axis of the entire beam. Resulting of the beamcould tension or compression position.Following data are given for the design prestressed concrete beam with simply supportedbeam.Concrete strengthf'c=60MPaRebar Strengthfy=60MPaTendon Tensile strengthfpu=1862MPaStandard Girder cross section:Cross section areaA=317x103mm2Section ModulusZt=82.9x106mm32|P a g e
Zb=91.1x106mm3Ixx=49900x106mm4Yb=548mmCross section of Beam section from I-Girder Section:T = 450 mmB = 500 mmC = 150 mmD = 1150 mmE = 175 mmF = 150 mmG = 130 mmW = 150 mmThe tendon force immediately induce after prestressed transfer to the concrete beam crosssection:Pi=1070.8MPaTendon force at the service load after allowance losses:Pe=856.6MPa3|P a g e
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