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Preface | |
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Basic Concepts | |
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Introduction | |
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Historical Development of Prestressing | |
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Basic Concepts of Prestressing | |
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Computation of Fiber Stresses in a Prestressed Beam by the Basic Method | |
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C-Line Computation of Fiber Stresses | |
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Load-Balancing Computation of Fiber Stresses | |
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SI Working Stress Concepts | |
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References | |
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Problems | |
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Materials and Systems for Prestressing | |
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Concrete | |
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Stress-Strain Curve of Concrete | |
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Modulus of Elasticity and Change in Compressive Strength with Time | |
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Creep | |
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Shrinkage | |
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Nonprestressing Reinforcement | |
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Prestressing Reinforcement | |
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ACI Maximum Permissible Stresses in Concrete and Reinforcement | |
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AASHTO Maximum Permissible Stresses in Concrete and Reinforcement | |
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Prestressing Systems and Anchorages | |
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Circular Prestressing | |
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Ten Principles | |
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References | |
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Partial Loss of Prestress | |
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Introduction | |
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Elastic Shortening of Concrete (ES) | |
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Steel Stress Relaxation (R) | |
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Creep Loss (CR) | |
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Shrinkage Loss (SH) | |
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Losses Due to Friction (F) | |
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Anchorage-Seating Losses (A) | |
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Change of Prestress Due to Bending of a Member ([Delta]f[subscript pB]) | |
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Step-by-Step Computation of All Time-Dependent Losses in a Pre-Tension Beam | |
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Step-by-Step Computation of All Time-Dependent Losses in a Post-Tension Beam | |
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Lump-Sum Computation of Time-Dependent Losses in Prestress | |
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SI Prestress Loss Expressions | |
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References | |
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Problems | |
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Flexural Design of Prestressed Concrete Elements | |
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Introduction | |
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Selection of Geometrical Properties of Section Components | |
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Service-Load Design Examples | |
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Proper Selection of Beam Sections and Properties | |
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End Blocks at Support Anchorage Zones | |
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Flexural Design of Composite Beams | |
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Summary of Step-by-Step Trial-and-Adjustment Procedure for the Service-Load Design of Prestressed Members | |
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Design of Composite Post-Tensioned Prestressed Simply Supported Section | |
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Ultimate-Strength Flexural Design | |
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Load and Strength Factors | |
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ACI Load Factors and Safety Margins | |
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Limit State in Flexure at Ultimate Load in Bonded Members: Decompression to Ultimate Load | |
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Preliminary Ultimate-Load Design | |
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Summary Step-by-Step Procedure for Limit at Failure Design of the Prestressed Members | |
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Ultimate Strength Design of Prestressed Simply Supported Beam by Strain Compatibility | |
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Strength Design of Bonded Prestressed Simply Supported Beam Using Approximate Procedures | |
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SI Flexural Design Expression | |
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References | |
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Problems | |
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Shear and Torsional Strength Design | |
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Introduction | |
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Behavior of Homogeneous Beams in Shear | |
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Behavior of Concrete Beams as Nonhomogeneous Sections | |
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Concrete Beams without Diagonal Tension Reinforcement | |
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Shear and Principal Stresses in Prestressed Beams | |
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Web-Shear Reinforcement | |
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Horizontal Shear Strength in Composite Construction | |
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Web Reinforcement Design Procedure for Shear | |
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Principal Tensile Stresses in Flanged Sections and Design of Dowel-Action Vertical Steel in Composite Sections | |
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Dowel Steel Design for Composite Action | |
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Dowel Reinforcement Design for Composite Action in an Inverted T-Beam | |
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Shear Strength and Web-Shear Steel Design in a Prestressed Beam | |
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Web-Shear Steel Design by Detailed Procedures | |
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Design of Web Reinforcement for a PCI Standard Double Composite T-Beam | |
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Brackets and Corbels | |
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Torsional Behavior and Strength | |
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Torison in Reinforced and Prestressed Concrete Elements | |
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Design Procedure for Combined Torsion and Shear | |
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Design of Web Reinforcement for Combined Torsion and Shear in Prestressed Beams | |
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SI Combined Torsion and Shear Design of Prestressed Beam | |
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References | |
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Problems | |
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Indeterminate Prestressed Concrete Structures | |
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Introduction | |
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Disadvantages of Continuity in Prestressing | |
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Tendon Layout for Continuous Beams | |
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Elastic Analysis for Prestress Continuity | |
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Examples Involving Continuity | |
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Linear Transformation and Concordance of Tendons | |
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Ultimate Strength and Limit State at Failure of Continuous Beams | |
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Tendon Profile Envelope and Modifications | |
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Tendon and C-Line Location in Continuous Beams | |
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Tendon Transformation to Utilize Advantages of Continuity | |
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Design for Continuity Using Nonprestressed Steel at Support | |
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Indeterminate Frames and Portals | |
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Limit Design (Analysis) of Indeterminate Beams and Frames | |
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References | |
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Problems | |
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Camber, Deflection, and Crack Control | |
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Introduction | |
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Basic Assumptions in Deflection Calculations | |
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Short-Term (Instantaneous) Deflection of Uncracked and Cracked Members | |
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Short-Term Deflection at Service Load | |
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Short-Term Deflection of Cracked Prestressed Beams | |
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Construction of Moment-Curvature Diagram | |
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Long-Term Effects on Deflection and Camber | |
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Permissible Limits of Calculated Deflection | |
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Long-Term Camber and Deflection Calculation by the PCI Multipliers Method | |
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Long-Term Camber and Deflection Calculation by the Incremental Time-Steps Method | |
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Long-Term Camber and Deflection Computation by the Approximate Time-Steps Method | |
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Long-Term Deflection of Composite Double-T Cracked Beam | |
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Cracking Behavior and Crack Control in Prestressed Beams | |
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Crack Width and Spacing Evaluation in Pretensioned T-Beam Without Mild Steel | |
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Crack Width and Spacing Evaluation in Pretensioned T-Beam Containing Nonprestressed Steel | |
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Crack Width and Spacing Evaluation in Pretensioned I-Beam Containing Nonprestressed Mild Steel | |
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Crack Width and Spacing Evaluation for Post-tensioned T-Beam Containing Nonprestressed Steel | |
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Crack Control by ACI Code Provisions | |
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SI Deflection and Cracking Expressions | |
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SI Deflection Control | |
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SI Crack Control | |
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References | |
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Problems | |
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Prestressed Compression and Tension Members | |
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Introduction | |
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Prestressed Compression Members: Load-Moment Interaction in Columns and Piles | |
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Strength Reduction Factor [phi] | |
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Operational Procedure for the Design of Nonslender Prestressed Compression Members | |
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Construction of Nominal Load-Moment (P[subscript n]-M[subscript n]) and Design (P[subscript u]-M[subscript u]) Interaction Diagrams | |
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Limit State at Buckling Failure of Slender (Long) Prestressed Columns | |
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Moment Magnification Method: First-Order Analysis | |
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Second-Order Frame Analysis and P - [Delta] Effects | |
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Operational Procedure and Flowchart for the Design of Slender Columns | |
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Design of Slender (Long) Prestressed Column | |
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Compression Members in Biaxial Bending | |
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Practical Design Considerations | |
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Reciprocal Load Method for Biaxial Bending | |
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Modified Load Contour Method for Biaxial Bending | |
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Prestressed Tension Members | |
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Suggested Step-by-Step Procedure for the Design of Tension Members | |
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Design of Linear Tension Members | |
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References | |
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Problems | |
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Two-Way Prestressed Concrete Floor Systems | |
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Introduction: Review of Methods | |
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Flexural Behavior of Two-Way Slabs and Plates | |
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The Equivalent Frame Method | |
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Two-Directional Load Balancing | |
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Flexural Strength of Prestressed Plates | |
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Bending of Prestressing Tendons and Limiting Concrete Stresses | |
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Load-Balancing Design of a Single-Panel Two-Way Floor Slab | |
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One-Way Slab Systems | |
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Shear-Moment Transfer to Columns Supporting Flat Plates | |
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Step-by-Step Trial-and-Adjustment Procedure for the Design of a Two-Way Prestressed Slab and Plate System | |
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Design of Prestressed Post-Tensioned Flat-Plate Floor System | |
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Direct Method of Deflection Evaluation | |
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Deflection Evaluation of Two-Way Prestressed Concrete Floor Slabs | |
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Yield-Line Theory for Two-Way-Action Plates | |
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Yield-Line Moment Strength of a Two-Way Prestressed Concrete Plate | |
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References | |
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Problems | |
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Connections for Prestressed Concrete Elements | |
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Introduction | |
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Tolerances | |
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Composite Members | |
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Reinforced Concrete Bearing in Composite Members | |
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Dapped-End Beam Connections | |
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Reinforced Concrete Brackets and Corbels | |
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Concrete Beam Ledges | |
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Selected Connection Details | |
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References | |
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Problems | |
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Prestressed Concrete Circular Storage Tanks and Steel Roofs | |
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Introduction | |
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Design Principles and Procedures | |
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Moment M[subscript 0] and Ring Force Q[subscript 0] in Liquid Retaining Tank | |
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Ring Force Q[subscript y] at Intermediate Heights of Wall | |
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Cylindrical Steel Membrane Coefficients | |
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Prestressing Effects on Wall Stresses for Fully Hinged, Partially Sliding and Hinged, Fully Fixed, and Partially Fixed Bases | |
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Recommended Practice for Situ-Cast and Precast Prestressed Concrete Circular Storage Tanks | |
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Crack Control in Walls of Circular Prestressed Concrete Tanks | |
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Tank Roof Design | |
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Prestressed Concrete Tanks with Circumferential Tendons | |
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Seismic Design of Liquid Containment Tank Structures | |
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Step-by-Step Procedure for the Design of Circular Prestressed Concrete Tanks and Dome Roofs | |
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Design of Circular Prestressed Concrete Water-Retaining Tank and Its Domed Roof | |
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References | |
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Problems | |
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LRFD and Standard AASHTO Design of Concrete Bridges | |
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Introduction: Safety and Reliability | |
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AASHTO Standard (LFD) and LRFD Truck Load Specifications | |
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Flexural Design Considerations | |
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Shear Design Considerations | |
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Horizontal Interface Shear | |
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Combined Shear and Torsion | |
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AASHTO-LRFD Flexural-Strength Design Specifications vs. ACI Code Provisions | |
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Step-by-Step Design Procedure (LRFD) | |
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LRFD Design of Bulb-Tee Bridge Deck | |
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LRFD Shear and Deflection Design | |
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Standard AASHTO Flexural Design of Prestressed Bridge Deck Beams (LFD) | |
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Standard AASHTO Shear Reinforcement Design of Bridge Deck Beams | |
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Shear and Torsion Reinforcement Design of a Box-Girder Bridge | |
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LRFD Major Design Expressions in Sl Format | |
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References | |
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Problems | |
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Seismic Design of Prestressed Concrete Structures | |
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Introduction: Mechanism of Earthquakes | |
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Spectreal Response Method | |
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Equivalent Lateral Force Method | |
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Seismic Shear Forces in Beams and Columns of a Frame: Strong Column-Weak Beam Concept | |
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ACI Confining Reinforcements for Structural Concrete Members | |
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Seismic Design Concepts in High Rise Buildings and Other Structures | |
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Structural Systems in Seismic Zones | |
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Dual Systems | |
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Design Procedure for Earthquake-Resistant Structures | |
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Sl Seismic Design Expressions | |
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Seismic Base Shear and Lateral Forces and Moments by the IBC Approach | |
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Seismic Shear Wall Design and Detailing | |
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Example 13.3 Structural Precast Wall Base Connection Design | |
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Design of Precast Prestressed Ductile Frame Connection in a High Rise Building in High-Seismicity Zone Using Dywidag Ductile Connection Assembly (DDC) | |
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Design of Precast Prestressed Ductile Frame Connection in a High-Rise Building in High-Seismicity Zone Using a Hybrid Connector System | |
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References | |
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Problems | |
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Computer Programs in Q-Basic | |
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Unit Conversions, Design Information, Properties of Reinforcement | |
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Selected Typical Standard Precast Double Tees, Inverted Tees, Hollow Core Sections, and AASHTO Bridge Sections | |
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Index | |