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  General

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  Lecturer : BADERUL HISHAM BIN AHMAD ROSLLI BIN NOOR MOHAMED Semester : 2 2010/2011

  
  

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  Synopsis
  
  

  This is an elective subject, which will provide students an understanding and ability to analyse and design prestressed concrete structural elements. Topics discussed include the concept and principles of prestressing, methods of prestressing concrete, stress limits, losses of prestress, selection of sectionand serviceability and strength requirements. Students will also be exposed to the complete analysis and design procedure of simply supported prestressed concrete non-composite and composite beams.

  
  

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  This work, MAE1183 PRESTRESSED CONCRETE DESIGN by BADERUL HISHAM BIN AHMAD and ROSLLI BIN NOOR MOHAMED is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at ocw.utm.my.

  
  
• Select topic Topic 1

  Topic 1

  Introduction
  

  • Basic concept of prestressing, prestressing methods, materials.

  • Facilities, equipments and hardware, reinforced vs. prestressed concrete

  • BS 8110 design considerations

  • Select activity Introduction

    

    Introduction File
• Select topic Topic 2

  Topic 2

  Elastic analysis of sections for flexure

  • Section properties, sign convention, example.

  • Stresses in concrete due to prestress and external loads, cracking moment, example.

  • Loads and loading stages, critical loadings, stresses at critical loadings, example

  • Select activity Elastic Analysis of Section

    

    Elastic Analysis of Section File
• Select topic Topic 3

  Topic 3
  Preliminary design for flexure
  

  • Stress range at a section, permissible stresses and inequality conditions, selection of sections

  • Graphical interpretation of inequality conditions.

  • Determination of prestressing force and eccentricity.

  • Select activity Priliminary Design

    

    Priliminary Design File
• Select topic Topic 4

  Topic 4
  Losses of prestresss

  • Sources of prestress loss, immediate and deferred losses.

  • Estimation of prestress losses: friction, anchorage slip, elastic shortening of concrete.

  • Creep and shrinkage of concrete and relaxation of steel

  • Select activity Prestress Loss

    

    Prestress Loss File
• Select topic Topic 5

  Topic 5
  Deflection 
  

  • Deflection of prestressed concrete beams, short-term deflection

  • Calculation of long-term deflection

  • Select activity Deflection

    

    Deflection File
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  Topic 6
  Composite beams

  • Composite construction, advantages, design differences.

  • Stages of loading, unshored and shored construction.

  • Stress range and inequality conditions

  • Select activity Composite Beams

    

    Composite Beams File
• Select topic Topic 7

  Topic 7
  Design for Ultimate Strength in Flexure

  • Analysis of sections at collapse, use of non-prestressed reinforcement, design considerations

  • Design example

  • Select activity Ultimate Flexure

    

    Ultimate Flexure File
• Select topic Topic 8

  Topic 8
  Design for Ultimate Strength in Shear

  • Overload behaviour of beams in combined bending and shear, benefits of prestressing

  • Shear resistance of uncracked & cracked sections

  • Design example

  • Select activity Ultimate Shear

    

    Ultimate Shear File
• Select topic Topic 9

  Topic 9
  Design of Anchorage Zone

  • Anchorage zone for pre-tensioned and post tensioned members, transmission length

  • End block for post-tensioned members

  • Examples

  
  

  • Select activity End Block Design

    

    End Block Design File