Key Features:
No of Pages" 78
Abstract:
The Project work presents an Optimum design of welded plate girder. A simply supported plate girder with span of 15meters was chosen for the case study. The girder was subjected to a self-weight of 50KN/m and concentrated loads of 1000KN at 5m and 10m from the left support. The plate girder was analysed to get the design moments and shear forces. An initial manual design was carried out for the plate girder in accordance with BS 5950-2000. From the design, initial section parameters comprising flange breadth, flange thickness, web depth and web thickness were assigned to the plate girder. The initial section parameters were then subjected to an optimisation process using Generalised Reduced Gradient (GRG) in Excel solver Add-in. From the optimisation process there was 19.34% reduction in the area of the plate girder which translates to 19.34% reduction in weight. This shows that optimisation process can be an effective tool in the search for solution into real world problems.
Table of Content:
Title Page
Certification
Approval
Dedication
Acknowledgment
Abstract
Table of Contents
List of Figures
List of Tables
List of Notations
CHAPTER ONE: INTRODUCTION
1.1. Background of study
1.2. Statement of Problem
1.3. Aim and Objectives of Study
1.4. Scope of Study
1.5. Significance of Study
CHAPTER TWO: LITERATURE REVIEW
2.1. Definition of plate girder
2.2. Types of plate girder
2.3. Different shapes of flanges and webs
2.3.1, Load bearing stiffeners
2.3.2. Longitudinal stiffeners
2.3.3. Transverse Stiffeners
2.4 Introduction of weld and stiffness to girder
2.5 Design methods of girders
2.6 Typical span-to-depth ratio for different girders
2.6.1. Span configuration
2.6.2. Girder Spacing
2.6.3. Spacing
2.6.4. Section Proportion
CHAPTER THREE: DESIGN METHODOLOGY
3.1. Introduction
3.2. Design Problem
3.3. Design Considerations
3.4. Design Procedure
3.4.1. Determination of section parameters
3.4.2. Dimension/sizing of plate girder element
3.4.3. Section classification/proportional limitation
3.4.4. Moment Resistance
3.4.5. Choice of Optimum depth
3.5. Optimisation programme
3.5.1. Design Parameters
3.5.2. Assumptions
3.5.3. Optimisation Process
3.5.4. Optimizer (Excel solver) settings
3.6. The Investigations
3.6.1. Selection of Numerical problem
3.6.2. The pilot design and search for pattern
3.6.3. Detailed Investigations
CHAPTER FOUR: RESULTS AND DISCUSSION
4.1. Design Brief
4.2. Loading
4.3. Design shear forces and moments
4.4. Initial sizing of plate girder
4.5. Section Classification
4.6. Dimension of web and flanges
4.7. Moment Resistance
4.8. Shear buckling resistance of web
4.9. Shear buckling resistance of end panel AB
4.10. Optimisation Result Analysis
4.11. Discussion of Results
CHAPTER FIVE: CONCLUSION AND RECOMMENDATIONS
5.1. Conclusion
5.2. Recommendations
REFERENCES
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