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| Title: | ANALYSIS AND DESIGN OF ASSEMBLED STEEL TRUSS BRIDGES |
| Authors: | TIHITINA, SIYOUM |
| Advisors: | Prof . Negussie Tebedge |
| Copyright: | 2007 |
| Date Added: | 17-Oct-2008 |
| Publisher: | Addis Ababa University |
| Abstract: | Table of Contents
Acknowledgement………………………………………..……...……………........……i
List of Symbols ……… …………………………………….......…….………......…...iv
List of Tables…….....…………………………….…………...…....………..…………..vii
List of Figures……………….....…………………….……...………………...….....…...viii
List of Appendices…...……….....…………………….……...………………...…...…...xii
Abstract……...........………………………………………....…………….…….….…....xiii
1. Introduction.............................................................................................................1
1.1 Background…………………………...………..………………………………...1
1.2 Objective ………………...………...………………………………………….....1
1.3 Thesis Content .........…………….………………..........…………………..….....1
1.4 Application of the study and limitations..……………………............…....……...1
2. Bridge Structure.......................................................................................................3
2.1. General………………………....……………….……………………..….….…..3
2.2. Classification of Bridges…….................……....………………..…………..…...3
2.3. Selection of bridge type..................………. …………………..... …..…..….…...5
2.4. Steel truss of Bridges…………………………………….....……………….…....6
2.4.1. Description....................……………….. ……………………..……….…....6
2.4.2. Why use steel truss bridges?...……... …………………………………........6
2.4.3. Steel bridges in Ethiopia....…………………….. ………………….….........7
3. Analysis and Design of Steel Truss Bridges...........................................................8
3.1. Bridge loading.……………....................................……………………..…….....8
3.1.1. Dead Load.....……….…………... …………………….…………………....8
3.1.2. Live Load...................……………....…….……………………………........8
3.1.3. Dynamic load allowance..............................……..........………………….....10
3.1.4. Wind load..………................................………….…………………….........11
3.1.5. Earth quake Loading..........................................… ……………………........11
3.2. Load Factors and Combinations.. …….…....………..……................…………...11
3.3. Load Application.....................…………........ ………..…....….…………….…..13
3.4. Interior Stringers............................................ …………………………………....14
3.5. Exterior Stringers..................... …………………........……………………….….14
3.6. Floor beams........................................................................…………………….…14
3.7. Live load Truss Stresses...................…..……...........………….............................15
3.8. Truss dead loads ...............……..............………............................................…..15
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3.9. Selection of Truss member........................……...................... ……....................16
3.10. Bridge Truss Deflection.....................................................…….........……...16
4. Selected bridges survey and design example........................................................17
4.1. Assessment of locally built Baily bridges.............................. ……..….…....…..17
4.2. Analysis and Design Example. ………................................................................21
4.2.1 X-Shaped Panel..................................................................................................21
4.2.1.1 Design Data.....................................................................................................21
4.2.1.2 Design of stringers...........................................................................................21
4.2.1.3 Design of floor beams......................................................................................34
4.2.1.4 Design of truss ................................................................................................43
4.2.2 Diamond Shaped Truss.......................................................................................54
4.2.2.1 The first option.................................................................................................55
4.2.2.1.1 Design Data...................................................................................................55
4.2.2.1.2 Design of floor beams ..................................................................................56
4.2.2.2 The second option............................................................................................64
4.2.2.2.1 Definition of geometry, boundary conditions and loading...........................65
4.2.2.2.2 Selection of design criteria............................................................................65
4.2.2.2.3 Evaluation of plate thickness t, and/ or other selected design criteria..........66
4.2.2.2.4 Design procedure..........................................................................................66
4.2.2.2.5 Design of the deck plate...............................................................................67
4.2.2.2.6 Stiffened Plate Deck.....................................................................................70
4.2.2.2.7 Design of floor beams...................................................................................74
4.2.2.2.8 Design of truss..............................................................................................82
4.2.2.2.9 Design of connections...................................................................................95
4.2.2.2.9.1 Design of welded connections....................................................................95
4.2.2.2.9.2 Design of pin and pin plates for panel connection.....................................99
4.3 Cost comparisons .................................................................................................103
5 Conclusions and Recommendations........................................................................104
5.2 Conclusions……………………………………………………...………..........…....104
5.3 Recommendations…………………………………..……………...…….….............105
References…....................................................................................................................105
Appendix A.......................................................................................................................106
Appendix B.......................................................................................................................109 |
| Description: | THESIS SUBMITTED TO THE SCHOOL OF GRADUATE STUDIES
OF ADDIS ABABA UNIVERSITY IN PARTIAL FULFILLMENT OF
THE REQUIREMENTS FOR THE DEGREE OF MASTER OF
SCIENCE IN CIVIL ENGINEERING |
| URI: | http://hdl.handle.net/123456789/1468 |
| Appears in: | Thesis - Civil Engineering
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