This handbook provides a comprehensive analysis of the current state of welding technology as applied to large structures and process plant. The author takes account of the increasing necessity for engineers at all levels to be aware of problems such as fatigue failure and provides advice.
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Professor Nedoseka presents an essential guide to the key principles and problems involved in the analysis of welded structures. In the introductory chapter, he discusses design issues, key equations and calculations, and the effects of varied heat sources in relation to the temperature field in welding. Subsequent chapters explore welding stresses and strains and fracture mechanics, the load carrying capacity of welded structures, diagnostics and prediction of the residual life of welded structures and acoustic emission techniques for the analysis of welded structures. The conclusion supplies supplementary information on numerical techniques and other tests for welded structures.
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Posted by: asim99 - 03-03-2013, 05:54 AM - Forum: General Books
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Principles of Physics, For Scientists and Engineers
Author: Hafez A. Radi, John O. Rasmussen | Size: 59 MB | Format:PDF | Quality:Unspecified | Publisher: Springer | Year: 2013 | pages: 1039 | ISBN: 9783642230257
This textbook presents a basic course in physics to teach mechanics, mechanical properties of matter, thermal properties of matter, elementary thermodynamics, electrodynamics, electricity, magnetism, light and optics and sound. It includes simple mathematical approaches to each physical principle, and all examples and exercises are selected carefully to reinforce each chapter. In addition, answers to all exercises are included that should ultimately help solidify the concepts in the minds of the students and increase their confidence in the subject. Many boxed features are used to separate the examples from the text and to highlight some important physical outcomes and rules. The appendices are chosen in such a way that all basic simple conversion factors, basic rules and formulas, basic rules of differentiation and integration can be viewed quickly, helping student to understand the elementary mathematical steps used for solving the examples and exercises. Instructors teaching form this textbook will be able to gain online access to the solutions manual which provides step-by-step solutions to all exercises contained in the book. The solutions manual also contains many tips, colored illustrations, and explanations on how the solutions were derived.
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Effect of Openings on Elephant’s Foot Buckling of Large Oil Tanks
Author: Zhi Ping Chen, Shun Juan Yan, Chu Lin Yu, Guo Wei Cao, Lei Wang, Li Cai Yang | Size: 1 MB | Format:PDF | Quality:Unspecified | Publisher: Scientific.Net | Year: 2010 | pages: 5
Large non-anchored welded steel oil tanks are important equipments that are renowned for their extremely large structures, they are vulnerable to elephant’s foot buckling failure which can cause serious damages in seismic. Generally, locations of tank openings are at the first layer of shell course which are just close to elephant’s foot buckling position of oil tanks. While learning the effect of openings on elephant’s foot buckling of oil tanks, the welding residual deformation was assumed to be initial geometric imperfections. Numerical simulation method was adopted to analyze the effect of three factors (oil tanks with or without openings, opening sizes and opening positions) on elephant’s foot buckling critical load of oil tanks. Results show that the openings and reinforcement plates are beneficial to the increase of buckling critical load; the size and location of the openings have little effect on the buckling critical load.
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Like never before we are aware of the crucial place of bridges in our lives. The spans that warranted little notice are now at the forefront of public and political debate and we are reminded of the rich history-and the uncertain future-of bridging in Minnesota. Historian Denis P. Gardner documents and celebrates a wide range of the state’s rural and urban spans, telling the remarkable stories of their construction and impact on Minnesota life and culture. From Pratt trusses to bowstring arches, Wood, Concrete, Stone, and Steel describes nearly every bridge type found in Minnesota, including railroad spans, and features more than 225 illustrations of historical and extant bridges. Gardner details the development of engineering and construction innovations (complete with a guide to trusses) and traces the fascinating politics and personalities behind the task of creating and maintaining safe, and often beautiful, crossings. Through arresting photographs and lively narrative, Gardner makes a compelling argument for the value of preserving our bridges and the cultural heritage they carry and brings to life their importance in Minnesota’s past, present, and future. Denis P. Gardner is an award-winning historian who has documented properties for the National Register of Historic Places and the Historic American Engineering Record. He is the author of Minnesota Treasures: Stories behind the State’s Historic Places. Eric DeLony is former director of the Historic American Engineering Record.
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Vibration and stability of an initially stressed laminated plate based on a higher-order deformation theory
Doong, Ji-Liang; Chen, Tsyr-Jang; Chen, Lien-Wen (1987) Composite Structures. 7(4): pp. 285 - 309.
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Bilinear S-N Curves and Equivalent Stress Ranges for Fatigue Life Estimation
Author: Yen, B., Hodgson, I., Zhou, Y., and Crudele, B. | Size: 1 MB | Format:PDF | Quality:Original preprint | Publisher: ASCE | Year: 2013 | pages: 5
With the magnitude of some stress cycles in a live load stress range spectrum being higher than the constant amplitude fatigue limit (CAFL) of a structural detail, the development of a fatigue crack could be expected. The current procedure in the AASHTO specifications for fatigue life estimation utilizes an equivalent constant amplitude stress range with the direct extension of the S-N lines of slope −3 to below the CAFL. This approach is conservative; however, it often results in overprediction of fatigue damage and underestimation of the safe useful life of structural details. A set of bilinear S-N curves with the knee at the CAFL for the AASHTO fatigue strength categories and a slope of −4 below have been produced analytically for estimating fatigue life of existing structures subjected to variable live load stresses. This paper provides information regarding the development of the new equivalent constant amplitude stress ranges for the bilinear S-N curves. The results from a few examples are presented. Adoption of the procedure presented herein for fatigue life estimation is recommended.
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Response and Analysis of a Large Diameter Drilled Shaft Subjected to Lateral Loading
Author: Tong Qiu, Patrick J. Fox, Kerop Janoyan, Jonathan P. Stewart and John W. Wallace | Size: 1 MB | Format:PDF | Quality:Original preprint | pages: 12
Numerical analyses are presented for the response of a 2 m diameter drilled shaft with flagpole configuration subjected to lateral loading. The analyses were conducted using three software programs: LPILE (subgrade reaction model), SWM (strain wedge model), and ABAQUS (3-D finite element model). The analyses consider nonlinear behavior of the reinforced concrete shaft, contact-slip-gap at the soil-shaft interface, and elastic-plastic properties of the soil. Numerical results are compared with measurements from a full-scale field test for the shaft and include lateral displacement at the top of the shaft, subgrade reaction (p-y) curves at three depths, and distributions of bending moment and shear force along the shaft.
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I always wanted to be a bridge engineer. As a young man I worked on a number of big bridges and experienced a wide range of erection gantries. Most of them were a challenge to my comfort. Despite moving out of bridges and into academia 30 years ago, I have retained an interest in big bridges and I was very pleased to be asked to steer this Guide into a second edition. Bridge gantries, whether used for access or for works, can be a cause of real danger. Despite considerable efforts to improve design, manufacture and management of gantries, failures still occur and people are still killed. It may seem strange that the first message in a volume about gantries should be, “don’t use them unless you have to, and if you think you have to, think again”. Other forms of access are always being developed and even an existing gantry may be more difficult to use and more dangerous than a modern, flexible system. Of course, there are bridges where nothing else will do, where a gantry is truly essential, but even there, making a complex gantry that can reach into difficult corners may not be justified.
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