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prestressed concrete design

prestressed concrete design

Prestressing places a concrete member in compression; these compressive stresses counteract the tensile bending stresses of an applied load. Civil Engineering Design (1) Prestressed Concrete Girder Design. Calculate the loss of prestress due to elastic shortening, creep and shrinkage of the concrete and relaxation of the prestressing strands. 1. 9.7.2 General Guidelines for Beam Sections 9.8.4 Minimum Side Face Reinforcement It took until the 1920s and ‘30s for its materials development to progress to a level where prestressed concrete could be used with confidence. 2.1 Introduction 7.3.1 Bearing Stresses Behind Anchorage 3.4 Characteristic and Design Strength of Material 3.7 Limit State Design of Prestressed Concrete Members As we know that the concrete undergo compressive stress and reinforcement rebar undergo in tension stress. 9.1 Introduction 7.2.5 End Zone Reinforcement Contents We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. 5.6 Additional Stress in Tendon Due to Bending 2.3.2 Compressive Strength of Concrete 9.6 Cable Zone The author does a great job of going into detail and citing how the ACI and AASHTO codes require prestessed concrete design to be performed. 10.2.4 Stresses in Composite Section at Service Condition (Total Design Load Condition) 2.3.1 Need for High Strength Concrete (1) This chapter gives general guidelines required for the design of prestressed concrete structures or members with CFRM tendons or CFRM tendons in conjunction with steel tendons. 4.3.2 Loss Due to Creep of Concrete This manual is not intended to replace the necessity of a profession engineered design. Index. 1.7 Comparison with Reinforced Concrete 4.2.1 Loss Due to Elastic Shortening of Concrete 11.2.1 Primary and Secondary Moments and Shears 6.3.4 Design Provisions for Torsion as per IS:1345–1980 13.4 Prestressed Concrete Circular Tanks It is substantially "prestressed" (compressed) during production, in a manner that strengthens it against tensile forces which will exist when in service. 4.3.3 Loss Due to Relaxation of Steel References The prestressed concrete design of a structure is influenced by either of the two processes, pre-tensioning, and post-tensioning. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 1.5.1 Pre-tensioning 5.2.2.2 Pressure Line Problems PCI Details Precast/Prestressed Concrete Institute. 13.2.3 Design 5.7.3 Modes of Failure in Flexure 6.3.3 Design Methods for Torsion 7.2.2 Transmission Length 2.3 Concrete 2.3.3 Tensile Strength of Concrete 6.2.7 Maximum Ultimate Shear Force (Vu, max) design of their projects. 4.4 Total Loss in Prestress For time-dependent losses, the template uses the provisions stated under article 5.9.5.4 (Refined Estimates of Time-Dependent Losses) of the AASHTO LRFD Bridge Design Specifications 2012. 1.4 Structural Behaviour of Prestressed Concrete Member 10.5 Ultimate Moment of Resistance In ordinary reinforced concrete, stresses are carried by the steel reinforcement, whereas prestressed concrete supports the load by induced str… If you continue browsing the site, you agree to the use of cookies on this website. PCI Design Handbook, Sixth Edition. 9.3 Minimum Section Modulus Advantages of Prestressed Concrete. 9.8.1 Concrete Cover 1 Recommended Practice for Design, Manufacture and Installation of Prestressed Concrete Piling, PCI Committee on Prestressed Concrete Piling, Mar-Apr 1993 6.2.2 Identification of Zones for Shear Design Problems 3.1 Introduction Prestressed concrete is a structural material that allows for predetermined, engineering stresses to be placed in members to counteract the stresses that occur when they are subject to loading. It combines the high strength compressive properties of concrete with the high tensile strength of steel. Chapter 8: Deflections Cover Now customize the name of a clipboard to store your clips. 10.4 Horizontal Shear Transfer 7.2 Anchorage Zones in Pre-tensioned Members 2.2 Prestressing Steel 1.3 Brief History of Prestressed Concrete, 1.4 Structural Behaviour of Prestressed Concrete Member, 1.6.1 Classification as per IS:1343–19801, 2.2.4 Modulus of Elasticity of Prestressing Steel, 2.2.5 Maximum Initial Prestress in Tendon, 2.3.5 Time-dependent Deformation of Concrete, 3.4 Characteristic and Design Strength of Material, 3.5 Characteristic and Design Stress–Strain Curves, 3.5.2 Stress–Strain Curves for Prestressing Steel, 3.7 Limit State Design of Prestressed Concrete Members, 4.2.1 Loss Due to Elastic Shortening of Concrete, 5.2 Analysis at Serviceability Limit State, 5.6 Additional Stress in Tendon Due to Bending, 5.7 Flexural Behaviour of Prestressed Concrete Member, 5.8.1 Analysis of Rectangular Sections with Bonded Tendons, 5.8.2 Analysis of Post-tensioned Rectangular Beams Having Unbonded Tendons, 6.2.1 Effect of Prestress in Shear Strength, 6.2.2 Identification of Zones for Shear Design, 6.2.4 Ultimate Shear Resistance of Concrete Vuc, 6.2.7 Maximum Ultimate Shear Force (Vu, max), 6.3.1 Equilibrium Torsion and Compatibility Torsion, 6.3.2 Failure of Concrete Member Due to Torsion, 6.3.4 Design Provisions for Torsion as per IS:1345–1980, 7.2 Anchorage Zones in Pre-tensioned Members, 7.3 Anchorage Zones in Post-tensioned Members, 8.2.1 Short Term Deflection at Transfer Δst, 8.2.2 Long Term Deflection at Service Condition Δls, 9.3.1 Minimum Section Modulus for the Top Fibre Za, 9.3.2 Minimum Section Modulus for the Bottom Fibre Zb, 9.7.2 General Guidelines for Beam Sections, 9.8 Requirements for Flexural Reinforcement, 9.9 Design Procedure for Prestressed Concrete Members, 10.2 Analysis at Serviceability Limit State, 10.2.1 Stresses in Precast Web at Transfer, 10.2.2 Stresses in Precast Web After Time Dependent Losses, 10.2.3 Stresses in Precast Web After Casting of In-situ Slab, 10.2.4 Stresses in Composite Section at Service Condition (Total Design Load Condition), 10.3 Stresses Due to Differential Shrinkage, 10.6.2 Required Prestressing Force and Allowable Cable Zone, 11.2 Effects of Prestress in Indeterminate Structure, 11.2.1 Primary and Secondary Moments and Shears, 11.2.2 Section Moments and Concrete Moments, 11.2.3 Pressure Line Due to Prestressing Force, 11.2.4 Calculating the Effects of Prestress Using the Concept of Equivalent Loads, 11.3 Linear Transformation of Cable Profile, 11.6 Calculation of Elastic Stresses in Concrete, 13.2.1 Analysis at Transfer (Fig. 8.2.1 Short Term Deflection at Transfer Δst The book focuses on the behaviour of the pre-stressed concrete structural elements. 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