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SUMMARY
The present book is based on lectures in the specializing course \"Buckling and collapse of structures\" given at Division of Marine Structures, the Norwegian institute of Technology. The background for the modern design methods for buckling and collapse is described and special emphasis is laid upon application of these techniques in collision studies. It is hoped that the book may represent a valuable supplement to design rules.
CONTENTS:
1. INTRODUCTION
1.1 PRINCIPLES OF ULTIMATE LOAD DESIGN
1.1.1 General Design Procedure
1.1.2 Design Loads and Strengths in the Ultimate Limit State
1.1.3 Sub-Division and Use of Partial Factors
1.1.4 Load Effects
1.1.5 Combination of Loads
1. 2 FABRICATION FACTORS AFFECTING STRENGTH
1. 2.1 Mechanical Properties of Steel
1. 2. 2 Residual Stresses
1.2.3 Variation in Yield Stress over Cross Section
1.2.4 Geometric Imperfections
1.3 BEHAVIOUR OF STRUCTURAL COMPONENTS IN THE ULTIMATE LIMIT STATE
1.3.1 Members under Axial Loads
1.3.2 Flexural Members
2. PLASTIC CAPACITY OF BEAMS AND FRAMES
2.1 BEAMS UNDER TRANSVERSE LOADING
2.1.1 Introduction
2.1.2 Simple Plastic Theory
2.1.3 Moment Capacity
2.1.4 The Mechanism Method for Beams
2.1.5 The Bound Theorems
2.1.6 Examples of Application of the Bound Theorems
2.2 PLASTIC HINGE THEORY FOR FRAMES
2.2.1 The Mechanism Method Applied on Frames. Illustration by a Portal Frame
2.2.2 General Procedure for Plastic Hinge Analysis of Frames
2.3 PLASTIC CROSS-SECTIONAL CAPACITIES FOR AXIAL LOAD, SHEAR AND TORSION
2.3.1 Plastic Axial Load
2.3.2 Shear Capacity
2.3.3 Torsional Capacity
2.4 PLASTIC CAPACITIES UNDER COMBINED LOADING
2.4.1 Bending and Axial Load
3. PLATES UNDER LATERAL LOADS
3.1 PLASTIC COLLAPSE OF HORIZONTALLY FREE PLATE ELEMENTS
3.1.1 Simply Supported Plate
3.1.2 Clamped Plate
3.2 INFLUENCE OF MEMBRANE FORCES ON THE PLASTIC CAPACITY OF PLATES
3.2.1 Simply Supported Plate-Strip with Horizontally Fixed Ends
3.2.2 Use of the Principle of Virtual Work on a Simply Supported Plate-Strip under Concentrated load
3.2.3 Simply Supported Plate-Strip under Distributed Load
3.2.4 Clamped Plate-Strip. Horizontally Fixed
3.2.5 Load-Deflection Relation for Plate-Strip with Partial End Fixity
3.2.6 Nonlinear Analysis of a Ro/ro Deck
4. APPLICATION OF PLASTIC METHODS IN THE STUDY OF COLLISION PROBLEMS
4.1 INTRODUCTION
4.2 FUNDAMENTALS OF IMPACT ANALYSIS
4.2.1 Impact Geometry
4.2.2 Energy Absorption
4.2.3 Simplified Impact Model
4.2.4 Estimation of Impact Duration
4.3 IMPACT CAPACITIES OF STEEL JACKETS
4.3.1 Type of Damage
4.3.2 Local Damage of Bracing/Leg
4.3.2.1 Ring Models
4.3.2.2 Indentation Models
4.3.3 Global Deformation of Bracing/Leg
4.3.4 Capacities of Tubular Joints
4.3.4.1 Ultimate Strength of T-Joints in Compression
4.3.4.2 Ultimate Strength of T-Joints in Tension
4.3.4.3 Ultimate Strength of V-Joints
4.3.4.4 Ultimate Strength ofIn-Plane K-Joints
4.3.4.5 Ultimate Strength of X-Joints
5. BUCKLING OF COMPRESSION MEMBERS
5.1 THE BUCKLING PHENOMENON
5.1.1 Two Rigid Bars Connected by Torsion Spring
5.1.2 Buckling of Pin-Ended Column
5.2 EFFECT OF GEOMETRIC IMPERFECTIONS
5.3 FLEXURAL BUCKLING OF BARS
5.3.1 Effective Length
5.3.2 Compression Members with Variable Cross Section
5.3.2.1 General
5.3.2.2 Rotationally Free Ends
5.3.2.3 Rotationally Fixed Ends
5.3.2.4 Cantilevered Bar
5.3.2.5 Pin-Ended Bar with Continuous Change in Cross Section
5.3.3 Bars with Intermediate Loads
5.3.3.1 Pin-Ended Bar with Loads at Ends and at Midpoint
5.3.3.2 Some Cases of Intermediate Loading
5.3.4 Buckling of Elastically Supported Bars
5.3.4.1 Equally Spaced Supports
5.3.4.2 Continuous Elastic Support
5.3.5 Bar with Elastic Rotation Restraints
5.3.6 Effective Lengths of Compression Members in Frames
5.4 DESIGN OF CENTRALLY COMPRESSED MEMBERS AGAINST FLEXURAL BUCKLING
5.4.1 The ECCS Column Curves
5.4.2 Small Lateral Loads
5.5 BEAM-COLUMNS WITH NO TORSIONAL BUCKLING
5 5.1 The Modified Perry-Robertson InteractIOn Formula
5.6 TORSIONAL BUCKLING
5.6.1 Torsional Buckling of Centrally Compressed Bar. Shear Centre and Centroid Coincide
5.6.2 Restrained Torsional Buckling. Fixed Axis of Rotation and Elastic Rotation Restraints
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