Buckling and Ultimate Strength of Ship and Ship-like Floating Structures: Buckling/Plastic Collapse Behavior and Ultimate Strength [Mīkstie vāki]

(Professor Emeritus of Osaka University and Hiroshima University, Technical Advisor at Tsuneishi Shipbuilding Co., Ltd., Japan), (Department of Naval Architecture and Ocean Engineering, Osaka University, Japan)
  • Formāts: Paperback / softback, 536 pages, height x width x depth: 229x152x28 mm, weight: 1090 g, black & white illustrations
  • Izdošanas datums: 02-Aug-2016
  • Izdevniecība: Butterworth-Heinemann Inc
  • ISBN-10: 0128038497
  • ISBN-13: 9780128038499
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  • Formāts: Paperback / softback, 536 pages, height x width x depth: 229x152x28 mm, weight: 1090 g, black & white illustrations
  • Izdošanas datums: 02-Aug-2016
  • Izdevniecība: Butterworth-Heinemann Inc
  • ISBN-10: 0128038497
  • ISBN-13: 9780128038499
Citas grāmatas par šo tēmu:
Buckling and Ultimate Strength of Ship and Ship-like Floating Structures provides an integrated state-of-the-art evaluation of ship structure mechanics including buckling, plastic failure, ultimate strength, and ultimate bending moments. For the design of any industrial product, it is necessary to understand the fundamentals in the failure behavior of structures under extreme loads. Significant developments have been made in understanding the analysis method of plastic collapse and behavior and strength of structures accompanied by buckling. Written by two of the foremost experts in international ship design and ocean engineering, this book introduces fundamental theories and methods as well as new content on the behavior of buckling/plastic collapse that help explain analysis like the initial imperfections produced by welding and the ultimate strength of plates, double bottom structures of bulk carriers, and ship and FPSO hull girders in longitudinal bending.Rounding out with additional coverage on floating structures such as oil and gas platforms and LNG/FLNG structural characteristics,Buckling and Ultimate Strength of Ship and Ship-like Floating Structures is a must-have resource for naval architects and other marine engineering professionals seeking to gain an in-depth understanding of the technological developments in this area.Explains how the initial imperfections produced by welding, residual stress, and initial deflection in panels influence the collapse behavior and the compressive ultimate strength of rectangular platesEvaluates the ultimate strength of plate girders under bending and shearing as well as combined bend/shear loadsProvides fundamental theories, simple formulas, and analytical methods such as Finite Element Method or Smiths Method to simulate and evaluate buckling/plastic collapse behavior and strength of plates under various conditionsAuthored by two of the foremost experts in international ship design and ocean engineeringIncludes additional coverage on floating structures such as oil and gas platforms

Papildus informācija

Written by two of the foremost experts in international ship design and ocean engineering, this practical guide provides an integrated state-of-the-art evaluation of ship structure mechanics including buckling, plastic failure, ultimate strength, and ultimate bending moments
Preface xv
Acknowledgments xvii
Chapter 1 Introduction 1(12)
1.1 Buckling/Plastic Collapse of Ship and Ship-Like Floating Structures
1(6)
1.2 Short Historical Review on Research Works
7(1)
1.3 Contents of the Text
8(2)
Exercises
10(1)
References
10(3)
Chapter 2 Initial Imperfections Due to Welding 13(22)
2.1 Initial Imperfections Due to Welding
13(1)
2.2 Welding Residual Stress
13(4)
2.2.1 Welding Residual Stress in Panels
13(3)
2.2.2 Welding Residual Stress in Stiffened Panels
16(1)
2.3 Initial Distortion/Deflection
17(10)
2.3.1 Mechanism Producing Initial Distortion/Deflection and Its Measurement
17(1)
2.3.2 Shape of Initial Deflection in Panels
18(3)
2.3.3 Magnitude of Initial Deflection in Panels
21(5)
2.3.4 Initial Deflection in Longitudinal Stiffeners
26(1)
2.4 Setting of Initial Imperfections Due to Welding in Buckling/Plastic Collapse Analysis
27(6)
Exercises
33(1)
References
34(1)
Chapter 3 Fundamental Theory and Methods of Analysis to Simulate Buckling/Plastic Collapse Behavior 35(40)
3.1 Deflection Mode of Plates and Stiffened Plates in Buckling/Plastic Collapse Behavior
35(7)
3.1.1 Buckling Collapse Behavior of Plates
35(3)
3.1.2 Buckling Collapse Behavior of Stiffened Plates
38(3)
3.1.3 Buckling Collapse Behavior of Stiffeners
41(1)
3.2 Buckling Strength Analysis
42(4)
3.2.1 General Theory for a Rectangular Plate
42(2)
3.2.2 Elastic Buckling Strength of a Rectangular Plate Under Uni-Axial Thrust
44(2)
3.3 Elastic Large Deflection Analysis of Rectangular Plate Subjected to Combined Loads
46(8)
3.3.1 Assumed Deflection Mode
47(1)
3.3.2 In-Plane Stress and Strain
47(2)
3.3.3 Bending Stress and Strain
49(1)
3.3.4 Overall Shrinkage and Shear Deformation Considering Large Deflection Effects
49(1)
3.3.5 Elastic Large Deflection Behavior
50(4)
3.3.6 Elastic Large Deflection Analysis of Rectangular Plate Subjected to Uni-Axial Thrust
54(1)
3.4 Elastoplastic Large Deflection Analysis
54(10)
3.4.1 Fundamentals
54(2)
3.4.2 Displacement Field in the Element
56(1)
3.4.3 Strain-Displacement Relationships
57(2)
3.4.4 Stress-Strain Relationships
59(2)
3.4.5 Introduction of Virtual Stiffness
61(2)
3.4.6 Derivation of the Stiffness Matrix
63(1)
Exercises
64(1)
3.5 Appendix: Fundamental Equations for Elastic Large Deflection Analysis Assuming General Deflection Mode
65(5)
3.5.1 Airy's Stress Function
65(1)
3.5.2 In-Plane Stress and Strain Components
65(2)
3.5.3 Bending Strain and Stress Components
67(1)
3.5.4 Coefficients in Fundamental Equations
68(2)
3.6 Appendix: Derivation of Eq. 3.83 for Strain-Displacement Relationship
70(2)
3.7 Appendix: Derivation of Initial Stress Stiffness Matrix
72(1)
References
73(2)
Chapter 4 Buckling/Plastic Collapse Behavior and Strength of Rectangular Plate Subjected to Uni-Axial Thrust 75(82)
4.1 Possible Buckling Modes/Behavior
75(7)
4.1.1 Buckling
75(1)
4.1.2 Elastic Postbuckling Behavior of Short Plate
76(4)
4.1.3 Elastic Postbuckling Behavior of Long Plate
80(2)
4.2 Buckling Strength
82(4)
4.2.1 Influence of Boundary Condition on Buckling Strength
82(2)
4.2.2 Influence of Welding Residual Stress on Buckling Strength
84(2)
4.3 Local Buckling Strength of Stiffened Plate Considering Web-Plate Interactions
86(8)
4.3.1 Interaction Between Plate and Stiffener
86(1)
4.3.2 Derivation of Interactive Buckling Strength
87(2)
4.3.3 Influence of Plate-Stiffener Web Interaction on Local Buckling Strength
89(5)
4.4 Secondary Buckling in Rectangular Plate Subjected to Uni-Axial Thrust
94(10)
4.4.1 Elastic Secondary Buckling of Simply Supported Rectangular Plate
94(1)
4.4.2 Static Equilibrium Path in Secondary Buckling of Short Plate Under Uni-Axial Thrust
94(3)
4.4.3 Static Equilibrium Path in Secondary Buckling of Long Plate Under Uni-Axial Thrust
97(2)
4.4.4 Secondary Buckling Strength of Rectangular Plate Under Uni-Axial Thrust
99(2)
4.4.5 Influence of Out-of-Plane Boundary Conditions on Secondary Buckling Behavior
101(2)
4.4.6 Dynamic Phenomena in Secondary Buckling Behavior
103(1)
4.5 Postbuckling Behavior and Ultimate Strength
104(31)
4.5.1 Secondary Buckling and Buckling/Plastic Collapse Behavior
104(3)
4.5.2 Buckling/Plastic Collapse Behavior: Short Plates
107(20)
4.5.3 Buckling/Plastic Collapse Behavior: Long Plates
127(3)
4.5.4 Buckling/Plastic Collapse Behavior: Wide Plates
130(5)
4.6 Postultimate Strength Behavior of Rectangular Plate Under Uni-Axial Thrust
135(8)
4.6.1 Plates for Analysis
135(1)
4.6.2 Collapse Behavior Beyond Ultimate Strength
136(5)
4.6.3 Deflection Modes Beyond Ultimate Strength
141(2)
4.6.4 Concentration of Plastic Deformation Beyond Ultimate Strength
143(1)
4.7 Buckling/ Plastic Collapse Behavior of Rectangular Plates Under Uni-Axial Cyclic Loading
143(6)
4.7.1 Buckling/Plastic Collapse Behavior of Short Plates Under Single Cyclic Loading
143(3)
4.7.2 Buckling/Plastic Collapse Behavior of Short Plates Under Multicyclic Loading
146(3)
Exercises
149(3)
4.8 Appendix: Application of Method of Least Squares to Derive Deflection Components From FEM Results
152(1)
4.9 Appendix: Applicability of FEM Code to Buckling/Plastic Collapse Analysis of Plates Subjected to Cyclic Loading
153(1)
References
154(3)
Chapter 5 Buckling/Plastic Collapse Behavior and Strength of Rectangular Plates Subjected to Combined Loads 157(50)
5.1 Collapse Behavior and Strength of Continuous Plates Under Combined Longitudinal/Transverse Thrust and Lateral Pressure Loads
157(29)
5.1.1 Model for Analysis
157(2)
5.1.2 Influence of Loading Sequence on Buckling/Plastic Collapse Behavior
159(2)
5.1.3 Influence of Lateral Pressure on Elastic Buckling Strength of Continuous Plate Under Combined Longitudinal/Transverse Thrust and Lateral Pressure
161(5)
5.1.4 Buckling/Plastic Collapse Behavior Under Combined Transverse Thrust and Lateral Pressure
166(10)
5.1.5 Buckling/Plastic Collapse Behavior Under Combined Longitudinal Thrust and Lateral Pressure
176(8)
5.1.6 Collapse Behavior Under Combined Bi-Axial Thrust and Lateral Pressure
184(2)
5.2 Plates Under Combined Uni-Axial Thrust and Bending
186(13)
5.2.1 Loading Conditions
186(1)
5.2.2 Wide Rectangular Plates for Analysis
187(1)
5.2.3 Method to Apply Combined Thrust and Bending Loads
187(2)
5.2.4 Collapse Behavior Under Pure Bending
189(2)
5.2.5 Collapse Behavior Under Pure Thrust
191(2)
5.2.6 Collapse Behavior Under Combined Thrust and Bending Loads
193(5)
5.2.7 Approximate Formulas to Evaluate Buckling/Ultimate Strength of Rectangular Plates Subjected to Combined Thrust and Bending Loads
198(1)
5.3 Plates Under Combined Uni-Axial Thrust and Shear Loads
199(4)
5.3.1 Model for Analysis
199(1)
5.3.2 Ultimate Strength Under Pure Shear
200(1)
5.3.3 Ultimate Strength Under Combined Thrust and Shear
200(3)
Exercises
203(1)
5.4 Appendix: Ultimate Strength of a Strip Subjected to Axial Thrust
203(2)
References
205(2)
Chapter 6 Buckling/Plastic Collapse Behavior and Strength of Stiffened Plates 207(68)
6.1 Buckling Collapse Behavior and Strength of Stiffened Plates
207(1)
6.2 Buckling/Plastic Collapse Behavior and Strength of Continuous Stiffened Plates
208(37)
6.2.1 Modeling of Continuous Stiffened Plate for FEM Analysis
208(4)
6.2.2 Collapse Behavior of Stiffened Plates Under Longitudinal Thrust
212(9)
6.2.3 Collapse Behavior and Strength of Continuous Stiffened Plates Under Combined Longitudinal Thrust and Lateral Pressure Loads
221(13)
6.2.4 Collapse Behavior and Strength of Continuous Stiffened Plates Under Transverse Thrust
234(4)
6.2.5 Buckling/Plastic Collapse Behavior Under Combined Transverse Thrust and Lateral Pressure
238(5)
6.2.6 Collapse Behavior of Continuous Stiffened Plates Under Bi-Axial Thrust
243(2)
6.2.7 Collapse Behavior of Continuous Stiffened Plates Under Combined Bi-Axial Thrust and Lateral Pressure Loads
245(1)
6.3 Simplified Method to Evaluate Compressive Ultimate Strength of Continuous Stiffened Plates Subjected to Combined Bi-Axial Thrust and Lateral Pressure
245(20)
6.3.1 Modeling for Ultimate Strength Evaluation
245(1)
6.3.2 Continuous Stiffened Plates Subjected to Longitudinal Thrust
246(6)
6.3.3 Continuous Stiffened Plate Subjected to Combined Longitudinal Thrust and Lateral Pressure
252(2)
6.3.4 Continuous Stiffened Plates Subjected to Transverse Thrust
254(3)
6.3.5 Continuous Stiffened Plates Subjected to Combined Transverse Thrust and Lateral Pressure
257(2)
6.3.6 Continuous Stiffened Plates Subjected to Bi-Axial Thrust
259(1)
6.3.7 Continuous Stiffened Plates Subjected to Combined Bi-Axial Thrust and Lateral Pressure
260(2)
6.3.8 Closed Form Formulas to Evaluate Ultimate Strength of Stiffened Plates Subjected to Combined In-Plane Loads and Lateral Pressure
262(3)
Exercises
265(1)
6.4 Appendix: Buckling Strength of Column With Attached Plating Under Axial Compression
266(1)
6.5 Appendix: Parameters in Closed Form Formulas to Evaluate Ultimate Strength of Stiffened Plate Subjected to Combined Bi-Axial In-Plane Loads and Lateral Pressure
266(6)
6.5.1 Condition to Evaluate the Ultimate Strength
266(2)
6.5.2 Buckling Strength of Local Plate
268(1)
6.5.3 Effective Width of the Local Plate Beyond the Occurrence of Local Buckling
269(1)
6.5.4 Effective Thickness of Flat-Bar Stiffener Beyond the Occurrence of Local Plate Buckling
269(1)
6.5.5 Variables Necessary to Evaluate Warping Stress
269(1)
6.5.6 auxq
269(1)
6.5.7 cruyq
270(2)
References
272(3)
Chapter 7 Buckling/Plastic Collapse Behavior and Strength of Plate Girders Subjected to Combined Bending and Shear Loads 275(44)
7.1 Research on Buckling of Plate Girders in Ship and Ship-Like Floating Structures
275(1)
7.2 Buckling/Plastic Collapse Behavior and Strength of Unstiffened Plate Girders
276(30)
7.2.1 Basler's Findings
276(3)
7.2.2 Fujii's Formulations to Evaluate Ultimate Strength of Plate Girders
279(14)
7.2.3 Numerical Experiments on Collapse Behavior of Plate Girders
293(4)
7.2.4 Collapse Behavior of Plate Girders in Double Bottom Structure
297(9)
7.3 Buckling/Plastic Collapse Behavior and Strength of Stiffened Girders in Shear
306(10)
7.3.1 FEM Models for Analysis
307(1)
7.3.2 Girders With Vertically Stiffened Web Panel
308(2)
7.3.3 Girders With Horizontally Stiffened Web Panel
310(2)
7.3.4 Girders With Vertically Stiffened and Perforated Web Panel
312(2)
7.3.5 Girders With Horizontally Stiffened and Perforated Web Panel
314(2)
Exercises
316(1)
References
317(2)
Chapter 8 Progressive Collapse Behavior and Ultimate Strength of Hull Girder of Ship and Ship-Like Floating Structures in Longitudinal Bending 319(106)
8.1 Ultimate Longitudinal Strength
319(1)
8.2 Research Works on Progressive Collapse Behavior and Strength of Hull Girder in Longitudinal Bending
320(8)
8.2.1 Early Research Works on Hull Girder Strength
320(1)
8.2.2 Strength Tests on Actual Ships
320(1)
8.2.3 Progressive Collapse Behavior of Hull Girder Under Longitudinal Bending
321(3)
8.2.4 Calculation of Ultimate Hull Girder Strength
324(4)
8.3 Smith's Method
328(26)
8.3.1 Assumptions
328(2)
8.3.2 Stiffness Equation
330(1)
8.3.3 Application of Smith's Method
331(23)
8.4 Application of Nonlinear FEM
354(14)
8.4.1 Application of Explicit FEM
354(10)
8.4.2 Application of Implicit FEM
364(4)
8.5 Application of the ISUM
368(1)
8.6 Collapse Tests on Hull Girder Models
369(14)
8.6.1 History of Collapse Tests on Hull Girder Models
369(1)
8.6.2 Tests on 1/3-Scale Frigate Model
369(3)
8.6.3 Tests on a 1/10-Scale Wood-Chip Carrier Models
372(7)
8.6.4 Tests on 1/13-Scale Container Ship Models
379(4)
8.7 Total System for Progressive Collapse Analysis on Ship's Hull Girder
383(16)
8.7.1 Actual Collapse Behavior of Ship's Hull Girder in Extreme Sea
383(2)
8.7.2 Start of New Joint Research Project
385(1)
8.7.3 Load Analysis
386(2)
8.7.4 Progressive Collapse Analysis
388(1)
8.7.5 Example: Collapse Behavior of Kamsarmax Bulk Carrier in Alternate Heavy Loading Condition (Phase 1 Analysis)
388(7)
8.7.6 Fundamental Idea in Phase 2 Analysis
395(2)
8.7.7 Example: Collapse Behavior of Kamsarmax Bulk Carrier in Homogeneous Loading Conditions (Phase 2 Analysis)
397(2)
Exercises
399(1)
8.8 Appendix: Derivation of Average Stress-Average Strain Relationships of Elements for Smith's Method
399(12)
8.8.1 Modeling of Stiffened Plating
399(5)
8.8.2 Average Stress-Average Strain Relationship of Plating Between Stiffeners
404(1)
8.8.3 Average Stress-Average Strain Relationship of Stiffener Element With Attached Plating
405(6)
8.9 Appendix: A Simple Method to Evaluate Warping of Hull Girder Cross-Section
411(5)
8.9.1 Displacement Components
411(1)
8.9.2 Strain and Stress Components
412(1)
8.9.3 Application of Principle of Minimum Potential Energy
412(4)
8.10 Appendix: Fundamental Formulation in Explicit FEM
416(1)
8.11 Appendix: Relaxation of Welding Residual Stress by Preloading
417(1)
8.12 Appendix: Buckling Strength of Stiffener Element With Attached Plating
418(3)
References
421(4)
Chapter 9 Theoretical Background and Assessment of Existing Design Formulas to Evaluate Ultimate Strength 425(26)
9.1 Rule Formulas
425(1)
9.2 Assessment of Rule Formulas in CSR-B
425(3)
9.2.1 Formulas for Plates
425(1)
9.2.2 Formulas for Stiffeners
426(1)
9.2.3 Assessment of CSR-B Formulas on Ultimate Strength
426(2)
9.3 Assessment of Rule Formulas in Panel Ultimate Limit State (PULS)
428(8)
9.3.1 Theoretical Background of PULS
428(5)
9.3.2 Assessment of PULS Formulas on Ultimate Strength
433(3)
9.4 Average Stress-Average Strain Relationship for Application of Smith's Method
436(9)
9.4.1 Application of Smith's Method
436(1)
9.4.2 Average Stress-Average Strain Relationships Specified in CSR
436(2)
9.4.3 Assessment of Rule Formulas Specifying Average Stress-Average Strain Relationships
438(7)
Exercises
445(1)
9.5 Appendix: Ultimate Strength of Stiffened Plate Subjected to Uni-Axial Thrust
445(5)
References
450(1)
Chapter 10 Buckling/Plastic Collapse Behavior of Structural Members and Systems in Ship and Ship-Like Floating Structures 451(28)
10.1 Introduction
451(1)
10.2 Triangular Corner Brackets
451(4)
10.2.1 General
451(1)
10.2.2 Buckling/Ultimate Strength of Triangular Corner Bracket
452(1)
10.2.3 Optimum Thickness of Corner Bracket
453(2)
10.3 Watertight Transverse Bulkhead of Bulk Carrier
455(4)
10.3.1 Casualty of Bulk Carriers
455(1)
10.3.2 Buckling/Plastic Collapse Behavior and Strength of Watertight Transverse Bulkhead of Bulk Carriers Against Flooded Water Pressure
455(1)
10.3.3 Simple Method to Evaluate the Ultimate Strength of Corrugated Bulkhead Against Flooding Pressure
456(3)
10.4 Double Bottom of Bulk Carrier
459(5)
10.4.1 Double Bottom Structure in Bulk Carrier
459(1)
10.4.2 Buckling/Plastic Collapse Behavior and Strength of Double Bottom Structure
460(4)
10.4.3 Summary of Findings Regarding Buckling/Plastic Collapse of Double Bottom Structures
464(1)
10.5 Hatch Cover of Bulk Carriers
464(4)
10.5.1 Regulation on Hatch Cover of Bulk Carriers
464(1)
10.5.2 Buckling/Plastic Collapse Behavior of Hatch Cover
465(2)
10.5.3 Simple Method to Evaluate Collapse Strength of Hatch Cover
467(1)
Exercises
468(1)
10.6 Appendix: Optimum Thickness of Triangular Corner Bracket
468(4)
10.6.1 Fundamental Idea to Determine Optimum Thickness of Corner Bracket
468(4)
10.7 Simple Method to Evaluate Collapse Load of Corrugated Bulkhead subjected to Lateral Pressure
472(5)
10.7.1 Rigid Plastic Mechanism Analysis
472(1)
10.7.2 Influence of Local Buckling in Compression Flange
473(1)
10.7.3 Effectiveness of Web Plating at Clamped End
474(1)
10.7.4 Influences of Shedder Plate and Gusset Plate
475(1)
10.7.5 Influence of Shear Force on Fully Plastic Strength at Clamped End
476(1)
References
477(2)
Appendix A Chronological Table of Study on Buckling/Ultimate Strength 479(2)
Appendix B Fundamentals in Idealized Structural Unit Method (ISUM) 481(14)
B.1 Short History of ISUM Development
481(1)
B.2 Formulation of New ISUM Element
482(11)
B.2.1 Collapse Behavior of Rectangular Plate Under Thrust
482(1)
B.2.2 Assumed Displacement Field in the ISUM Element
483(3)
B.2.3 Generalized Strain and Stress Components
486(1)
B.2.4 Relationship Between Strains and Nodal Displacements
487(2)
B.2.5 Nonlinear Contribution of Shape Function to In-Plane Strain Components
489(1)
B.2.6 Relationship Between Generalized Stress and Generalized Strain
490(2)
B.2.7 Derivation of Stiffness Equation
492(1)
B.2.8 Extent of the Element
492(1)
B.3 Accuracy of the Proposed Shape Functions
493(1)
References
494(1)
Appendix C Structural Characteristics of Representative Ship and Ship-Like Floating Structures 495(16)
C.1 Bulk Carriers
495(3)
C.1.1 Structural Characteristics
495(1)
C.1.2 Attention From a Structural Strength Viewpoint
495(3)
C.2 Single Hull Tanker
498(1)
C.2.1 Structural Characteristics
498(1)
C.3 Attention From a Structural Strength Viewpoint
499(1)
C.4 Double Hull Tanker
499(3)
C.5 Container Ship
502(1)
C.5.1 Structural Characteristics
502(1)
C.5.2 Attention From a Structural Strength Viewpoint
502(1)
C.6 Pure Car Carrier
503(2)
C.6.1 Structural Characteristics
503(1)
C.6.2 Attention From a Structural Strength Viewpoint
504(1)
C.7 LNG Carrier (Moss-Type Sphere Tank System)
505(1)
C.7.1 Structural Characteristics
505(1)
C.8 Attention From a Structural Strength Viewpoint
505(1)
C.9 LNG Carrier (Membrane Tank System)
506(2)
C.9.1 Structural Characteristics
506(2)
C.9.2 Attention From a Structural Strength Viewpoint
508(1)
C.10 Ore Carrier
508(2)
C.10.1 Structural Characteristics
508(1)
C.10.2 Attention From a Structural Strength Viewpoint
509(1)
C.11 Floating Production, Storage, and Offloading Systems
510(1)
C.11.1 Structural Characteristics
510(1)
C.11.2 Attention From a Structural Strength Viewpoint
510(1)
Index 511
Tetsuya Yao is Professor Emeritus of Osaka University, Professor Emeritus of Hiroshima University and Technical Advisor at Tsuneishi Shipbuilding Co., Ltd. He received his BSc, MSc, and PhD in Engineering at Osaka University with a focus on Naval Architecture. His main fields of research include Structural Mechanics, Structural Analysis, Optimal Design, and Fracture Mechanics particularly in relation to buckling/plastic collapse behavior and strength of steel plated structures. Masahiko Fujikubo is Professor in Structural Integrity Laboratory in Department of Naval Architecture and Ocean Engineering, Osaka University. He received his BSc, MSc, and PhD in Engineering at Osaka University with a focus on Naval Architecture. After obtaining his master degree, he worked for the Nippon Steel Cooperation as an engineer. He was then employed as research assistant by Hiroshima University. Upon receiving his doctoral degree from Osaka University, he became associate professor in 1989 and professor in 1999. My research area is the ultimate strength of ships and offshore structures. He was involved in the development of very large floating structures (VLFS), such as a floating airport and wrote several books related to the structural strength and design of ships and offshore structures including VFFS.