Elasticity theory is a classical discipline. The mathematical theory of elasticity in mechanics, especially the linearized theory, is quite mature, and is one of the foundations of several engineering sciences. In the last twenty years, there has been significant progress in several areas closely related to this classical field, this applies in particular to the following two areas. First, progress has been made in numerical methods, especially the development of the finite element method. The finite element method, which was independently created and developed in different ways by sci entists both in China and in the West, is a kind of systematic and modern numerical method for solving partial differential equations, especially el liptic equations. Experience has shown that the finite element method is efficient enough to solve problems in an extremely wide range of applica tions of elastic mechanics. In particular, the finite element method is very suitable for highly complicated problems. One of the authors (Feng) of this book had the good fortune to participate in the work of creating and establishing the theoretical basis of the finite element method. He thought in the early sixties that the method could be used to solve computational problems of solid mechanics by computers. Later practice justified and still continues to justify this point of view. The authors believe that it is now time to include the finite element method as an important part of the content of a textbook of modern elastic mechanics.
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Guide Specifications for Strength Design of Truss Bridges (Load Factor Design), 1985
Size: 600 KB | Format:PDF | Quality:Scanner | Publisher: American Association of State Highway and Transportation Officials (AASHTO) | Year: 1986 | Pages: 9 | ISBN: 9781560512127, 1560512121
These Guide Specifications apply to truss spans over 500 feet long. Unless amended herein (amended to 1986) the existing provisions of the AASHTO Standard Specifications for Highway Bridges apply to truss bridge superstructures designed by the Strength Design Method. The following areas are covered: load factors, truss members, secondary stresses, perforated cover plates and lacing bars, half through spans; net section of tensions members; computation of member capacity; compression members - thickness of metal; eyebar pins; and gusset plates.
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Dynamic instability or dynamic buckling as applied to structures is a term that has been used to describe many classes of problems and many physical phenomena. It is not surprising, then, that the term finds several uses and interpretations among structural mechanicians. Problems of parametric resonance, follower-force, whirling of rotating shafts, fluid-solid interaction, general response of structures to dynamic loads, and several others are all classified under dynamic instability. Many analytical and experimental studies of such problems can be found in several books as either specialized topics or the main theme. Two such classes, parametric resonance and stability of nonconservative systems under static loads (follower-force problems), form the main theme of two books by V. V. Bolotin, which have been translated from Russian. Moreover, treatment of aero elastic instabilities can be found in several textbooks. Finally, analytical and experimental studies of structural elements and systems subjected to intense loads (of very short duration) are the focus of the recent monograph by Lindberg and Florence. The first chapter attempts to classify the various "dynamic instability" phenomena by taking into consideration the nature of the cause, the character of the response, and the history of the problem. Moreover, the various concepts and methodologies as developed and used by the various investigators for estimating critical conditions for suddenly loaded elastic systems are fully described. Chapter 2 demonstrates the concepts and criteria for dynamic stability through simple mechanical models with one and two degrees of freedom.
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The aim of this book is to present up-to-date methodologies in the analysis and optimization of the elastic stability of lightweight statically determinate, and in- determinate, space structures made of flexible members which are highly stiff when loaded centrally at the nodes. These are flat and curved space pin- connected open or enveloped lattices and reticulated shells which, due to their high loadbearing capacity to weight ratios, are gaining in importance in aerospace and other fields. They are utilized, for example, in space stations, as support structures for large radio-telescopes and for other equipment on earth and in outer space, as roof structures for the coverage and enclosure of large areas on earth and as underwater shell-type structures enveloped by a cover-shell capable of withstanding high hydrostatic pressures. ? Space structures of this type are generally subjected to considerable internal axial loads in the flexible members and they fail through the loss of global statical stability, usually precipitated by the intrinsic small imperfections at finite near-critical elastic deformations - and not primarily by the the break-down of the material of which they are made, as is the case in conventional systems. Thus, the criterion in the design of such structures calls for eliminating or isolating the onset of the elastic dynamic collapse thereby increasing their safe stability limit. ? Standard finite element methods, as they are employed by most users today, are totally inadequate for such analyses since they do not account for the choice of the branching paths in the loading process of the structure nor for the existence of the relevant collapse modes. ? These aspects are novel and they are presented here for the first time in comprehensive book form.
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Article/eBook Full Name: Dynamics of Pavement Structurres
Author(s): Martincek Gustav , Gustav Martincek , G Martincek
Edition: First Edition
Publish Date: 1995
ISBN: 9780419181002
Published By: CRC Press
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In India, Engineer's day is celebrated every year on September 15.This day commemorates the birthday of the legendary engineer Sir Mokshagundam Visvesvaraya KCIE (1860-1962). Internationally recognized for his genius in harnessing water resources, he was responsible for the successful design and construction of several river dams, bridges and the implementing irrigation and drinking water schemes all over India. He served as the dewan of the erstwhile Mysore State and was considered to be the architect of the all-round development of his home state of Karnataka. Amongst his most successful projects are the design and construction of the Krishna Raja Sagar dam and the adjoining Brindavan Gardens, turn-around of the Bhadravati Iron and Steel Works and the setting up of the Mysore Sandalwood Oil Factory. "Making Indian Engineering World-class" is the theme of Engineers Day 2014.
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Structure As Architecture: A Source Book for Architects and Structural Engineers, 2 edition
Author: Andrew Charleson | Size: 52.7 MB | Format:PDF | Quality:Original preprint | Publisher: Routledge Taylor and Francis | Year: 2014 | pages: 260 | ISBN: 9780415644594
Structure as Architecture presents a comprehensive analysis of the indispensable role of structure in architecture. An exploration, as well as a celebration, of structure, the book draws on a series of design studies and case study examples to illustrate how structure can be employed to realize a wide range of concepts in contemporary architecture.
By examining design principles that relate to both architecture and structural engineering, Andrew Charleson provides new insights into the relationship between both the technical and aesthetic aspects of architecture.
Now in its second edition, the text has been extensively revised and updated throughout. Features include:
• A brand new chapter on hidden structure, adding to the material on exposed structures
• Two new chapters on using structure to realise common architectural concepts through a combination of precedents and creative design
• Over 50 new case studies from across the globe
• Easy-to-understand diagrams and a highly visual design to aid understanding and accessibility
More than two hundred case studies of contemporary buildings from countries such as the UK, the US, France, Germany, Spain, Hong Kong, Australia and Japan illustrate how a thorough integration of structure adds layers of richness and enhances the realisation of architectural design concepts.
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