Preface of Ultimate limit state design of steel-plated structures
Plated structures are important in a variety of marine- and land-based applications, including ships, offshore platforms, box girder bridges, power/chemical plants, and box girder cranes. The basic strength members in plated structures include support members (such as stiffeners and plate girders), plates, stiffened panels, grillages, box columns, and box girders. During their lifetimes, the structures constructed with these members are subjected to various types of actions and action effects that are usually normal but sometimes extreme or even accidental.
In the past, criteria and procedures for designing plated structures were primarily based on allowable working stresses and simplified buckling checks for structural components. However, it is now well recognized that the limit state approach is a better basis for design because it is difficult to determine the real safety margin of any structure using linear elastic methods alone. It also readily follows that it is of crucial importance to determine the true limit state if one is to obtain consistent measures of safety that can then form a fairer basis for comparison of structures of different sizes, types, and characteristics. An ability to better assess the true margin of safety would also inevitably lead to improvements in related regulations and design requirements. Today, the preliminary design of ships including naval and merchant vessels, offshore structures such as ship-shaped offshore installations, mobile offshore drilling units, fixed-type offshore platforms and tension leg platforms, and land-based structures such as bridges and box girder cranes tends to be based on limit state considerations, including the ultimate limit state.
To obtain a safe and economic structure, the limit state-based capacity and structural behavior under known loads must be assessed accurately. The structural designer can perform such a relatively refined structural safety assessment even at the preliminary design stage if simple expressions are available for accurate prediction of the limit state behavior. A designer may even desire to do this for not only the intact structure but also structures with premised damage to assess their damage tolerance and survivability. Although most structural engineers in the industry are very skilled and well experienced in the practical structural design aspects based on the traditional criteria, they may need a better background in the concept of limit state design and related engineering tools and data. Hence, there is a need for a relevant engineering book on the subject that provides an exposition of basic knowledge and concepts.
Many structural specialists in research institutes continue to develop more advanced methods for the limit state design of plated structures, but they sometimes lack the useful engineering data to validate them. Students in universities want to learn more about the fundamentals and practical procedures regarding the limit state analysis and design and thus need a book that provides useful insights into the related disciplines. This book reviews and describes both the fundamentals and practical procedures for the ultimate limit state analysis and design of ductile steel-plated and aluminum-plated structures. Structural fracture mechanics and structural impact mechanics are also described. This book is an extensive update of my previous book Ultimate Limit State Design of Steel-Plated Structures (with Dr. A.K. Thayamballi), published in 2003.
In contrast to the previous book, this update covers both steel- and aluminum-plated structures together with the latest advances and many newly added materials not included in the 2003 version. The book is basically designed as a textbook. The derivation of the basic mathematical expressions is presented together with a thorough discussion of the assumptions and the validity of the underlying expressions and solution methods. I believe that the reader should be able to obtain insight into a wider spectrum of ultimate limit state analysis and design considerations in both an academic and a practical sense. In part, this book is an easily accessible analysis and design toolbox that facilitates learning by applying the concepts of the ultimate limit state for practice. This book is primarily based on my own insights and developments obtained from more than 35 years of professional experience, as well as information and findings provided by numerous other researchers and limit state design practitioners. Wherever possible, I have tried my best to acknowledge the invaluable efforts of other investigators and practitioners, and, if I have failed anywhere in this regard, I did so inadvertently
Download Ultimate Limit State Analysis and Design of Plated Structures Second Edition by Jeom Kee Paik in free pdf format.