Click here to load reader

Design of Single Pylon Cable Stay bridge

  • View
    710

  • Download
    6

Embed Size (px)

Text of Design of Single Pylon Cable Stay bridge

  • DESIGN OF SINGLE PYLON CABLE STAYED BRIDGE

    A PROJECT REPORT

    Submitted by

    HARISH.R 411711103006

    SATHYANARAYANAN.R 411711103031

    in partial fulfillment for the award of the degree

    of

    BACHELOR OF ENGINEERING

    in

    CIVIL ENGINEERING

    PRINCE SHRI VENKATESHWARA PADMAVATHY ENGINEERING

    COLLEGE, PONMAR

    ANNA UNIVERSITY: CHENNAI 600025

    OCTOBER 2014

  • ANNA UNIVERSITY: 600 025

    BONAFIDE CERTIFICATE

    Certified that this project report DESIGN OF SINGLE PYLON CABLE

    STAYED BRIDGE is the bonafide work of HARISH.R (411711103006) and

    SATHYANARAYANAN.R (411711103031) who carried out the project work

    under my supervision.

    Mrs.S. Kavitha Karthikeyan, B.E.,

    Assistant Professor

    HEAD OF THE DEPARTMENT

    Department of Civil Engineering

    Prince Shri Venkateshwara

    Padmavathy Engineering College,

    Ponmar

    Chennai: 600 048

    Ms. Snekha.G, B.E.,

    Assistant Professor

    SUPERVISOR

    Department of Civil Engineering

    Prince Shri Venkateshwara

    Padmavathy Engineering College

    Ponmar

    Chennai: 600 048

    Submitted for ANNA UNIVERSITY project viva voce held on .

    INTERNAL EXAMINER EXTERNAL EXAMINER

  • ACKNOWLEDGEMENT

    We would like to express our sincere thanks to our lovable parents for their

    loving support and encouragement.

    We gratefully acknowledge our sincere thanks to our honourable Chairman

    Dr. K. Vasudevan M.A., M.Phil., Ph.D., for giving his spontaneous and whole

    hearted encouragement for completing this project.

    We also thank Dr.V.Vishnu Karthik, M.D., Vice-Chairman for his enormous

    support and suggestion throughout the period of project.

    We are greatly thankful to our honourable principal Dr.T. Sounderrajan

    M.Tech., Ph.D., for rendering the technical staffs for successful completion of the

    project.

    We express our sincere thanks with the sense of gratitude to our respectful Head

    of Department Mrs.S.Kavitha Kathikeyan, B.E., for her interest and

    encouragement shown in our project.

    We sincerely thank our project guide Ms.Snekha.G, B.E., for her valuable

    advice, encouragement, suggestions and guidance in technical knowledge for the

    successful completion of our project.

    We sincerely thank our project co-ordinator Mr.Ramesh.J, B.E., for his valuable

    advice, encouragement and suggestions.

    We also express our deep gratitude to all other faculty members and lab assistants

    in our civil engineering department and all those were directly and indirectly

    helpful in the completion of our project.

    Last but not least, we thank our ALMIGHTY for enlightening us.

  • ABSTRACT

    This project focuses on designing a unique, safe, elegant and economical bridge

    in India that helps to make a mark in the field of Structural Art. The type of

    structure chosen for this project is a Cable Stayed Bridge. The structural cum

    artistic factor of the project that qualifies it as Structural Art is that the bridge will

    be designed in a way that only one supporting tower will exist to carry the entire

    bridge, thus making it a Single Pylon Cable Stayed Bridge. Shahpura Pond of

    Shahpura Joggers Park in Bhopal, Madhya Predesh is chosen as the site location

    for this bridge. Bhopal has taken a lot of initiatives to increase the tourism, many

    of which are civil related. The bridge is constructed over Shahpura pond with a

    fifty metre span. It is constructed as a pedestrian bridge for the joggers and is

    elliptical in shape to be supported by a single pylon. The improvement in the

    conceptual design is the provision of extended sections of the elliptical deck to

    counter balance the weight of the standard deck for maintaining the principle of

    Cable Stay. For the structural design, the Guyon Massonet method was adopted

    as it satisfies the differential distribution of loads on a curved bridge deck and

    also accounts for torsional moments in its design. With this design being

    successful, fellow engineers throughout the country will gain awareness of this

    field and India can show the world its engineering and artistic capabilities.

  • i

    TABLE OF CONTENTS

    CHAPTER TITLE PG NO

    List Of Tables i

    List Of Figures ii

    List Of Symbols iii

    List Of Charts iv

    1. Introduction 1

    1.1. Structural Art 1

    1.2. Bridges 1

    1.3. Suspension Bridge 2

    1.4. Cable Stayed Bridge 5

    1.5. Single Pylon Cable Stayed Bridge 7

    1.6. Site Location 8

    2. Literature Review 10

    3. Methodology 13

    4. Conceptual Design 14

    4.1. Dimensions 14

    4.2. Counter Weight Concept 15

  • ii

    5 Structural Design 18

    5.1. Guyon Massonet Method 18

    5.2. Loading 18

    5.2.1. Dead Load 18

    5.2.2. Live Load 19

    5.2.3. Wind Load 19

    5.2.4. Earthquake Load 19

    5.3. Currents 20

    5.4. Effective Length 20

    5.5. Design Of Bridge Deck 21

    5.5.1. Data 21

    5.5.2. Permissible Stresses 22

    5.5.3. Cross Section Of Deck 22

    5.5.4. Moment Of Inertia And

    Sectional Moduli 23

    5.5.4.1. Main Girder 23

  • iii

    5.5.4.2. Cross Girder 26

    5.5.5. Torsional Inertia 27

    5.5.5.1. Main Girder 27

    5.5.5.2. Cross Girder 28

    5.5.6. Longitudinal Moment 29

    5.5.6.1. Torsional Parameter 29

    5.5.6.2. Weighing Factor 31

    5.5.6.3. Dead Load 32

    5.5.6.4. Live Load 34

    5.5.7. Transverse Moment 35

    5.5.7.1. Flexural Parameter 35

    5.6. Reinforcement 39

    5.6.1. Slab 39

    5.6.2. Main Girder 40

    5.6.3. Cross Girder 41

    5.7. Design Of Extended Slabs 41

  • iv

    5.7.1. Loads 42

    5.7.2. Depth 43

    5.8. Beam 43

    5.9. Design Of Column 43

    5.9.1. Loading Plate 43

    5.9.2. Data 44

    5.9.3. Main Reinforcement

    5.9.4. Helical Reinforcement

    5.10. Design Of Pile Foundation

    5.10.1. Data

    5.10.2. Dimensions

    5.10.3. Longitudinal Reinforcement

    5.11. Design Of Cables

    6 Results And Conclusion 48

    7 References 50

    Appendix 51

  • v

    LIST OF TABLES

    Table 1: Values For Ko 30

    Table 2: Values For K1 31

    Table 3: Distribution Coefficients 32

    Table 4: 0 Values 36

    Table 5: 1 Values 36

  • vi

    LIST OF FIGURES

    Fig 1 Distribution Of Load In An Arch Bridge

    Fig 2 Forces Developed In A Suspension Bridge

    Fig 3 Forces Developed In A Cable Stay Bridge

    Fig 4 Types Of Cable Stayed Connections

    Fig 5 The Langkawi Sky Bridge

    Fig 6 Site Map

    Fig 7 Initial Concept Design

    Fig 8 Final Concept Design

    Fig 9 Zones Of Earthquake

    Fig 10 Arc Length Of An Ellipse

    Fig 11 Cross Section Of Main Girder

    Fig 12 Cross Section Of Cross Girder

    Fig 13 Reference Station And Position Of Loads

    Fig 14 Dead And Live Load Positions

    Fig 15 Reinforcements Of Slab

    Fig 16 Reinforcements Of Main Girder

    Fig 17 View Of Extended Slabs

    Fig 18 Reinforcements In Column

    Fig 19 Reinforcements In Pile

    Fig 20 Cross Section Of Cable

  • vii

    LIST OF SYMBOLS AND ABBREVIATIONS

    SYMBOLS ABBREVIATIONS

    x X Coordinate

    y Y Coordinate

    L Effective Length

    b Effective Width

    P Live Load

    tw Thickness Of Wearing Coat

    fck Grade Of Concrete

    fy Grade Of Steel

    cbc Permissible Stress In Concrete In Bending Compression

    st Permissible Stress In Steel In Tension

    m Modular Ratio

    j Lever Arm Coefficient

    CG Centre Of Gravity

    I,J Moment Of Inertia

    i,j Moment Of Inertia Per Unit Length

    Zt,Zb Sectional Modulus

    a Effective Span

    Io,Jo Torsional Moment Of Inertia

    io,jo Torsional Moment Of Inertia Per Unit Length

  • viii

    R Torsional Coefficient

    K Total Distribution Coefficient For Longitudinal Moment

    Torsional Parameter

    Flexural Parameter

    Ko Distribution Coefficient For Longitudinal Moment 1

    K1 Distribution Coefficient For Longitudinal Moment 2

    Weighing Factor

    DKw Total Distribution Coefficient For Longitudinal Moment

    Mdead Moment Due To Dead Load

    Mlive Moment Due To Live Load

    Mmean Mean Moment Per Unit Length

    0 Distribution Coefficient For Transverse Moment 1

    1 Distribution Coefficient For Transverse Moment 2

    Distribution Coefficient For Different Values Of

    My

    Transverse Bending Moment

    c Length Of Application Of Live Load

    w Factored Load

    l Effective Span Of Slab

    d Effective Depth Of Slab

    Ast Area Of Steel In Tension

    Astd Area Of Distribution Steel In Tension

  • ix

    Pu Axial Factored Load On Compression Member

    Asc Area Of Steel In Compression

    Ac Area Of Core Of Column

    sp Diameter Of Helical Reinforcement

    Dc Diameter Of Core

  • x

    LIST OF CHARTS

    Chart No: 1 Influence Curves For Transverse Moment 37

    Annexure B Transverse Moment Coefficients 52

  • 1

    CHAPTER-1

    INTRODUCTION

    1.1. STRUCTURAL ART

    Civil Engineering and Architecture are one of the oldest known subjects.

    From the pyramids in Egypt to Venice in Italy, these