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it's flash presentation,unzip and just click index
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Assessment of Existing Steel Structures: Recommendations for Estimation of Remaining Fatigue Life
Assessment of Existing Steel Structures: Recommendations for Estimation of Remaining Fatigue Life
B. Kühn, M. Lukić, A. Nussbaumer, H.-P. Günther, R. Helmerich, S. Herion, M.H. Kolstein,
S. Walbridge, B. Androic, O. Dijkstra, Ö. Bucak
This report is part of the so-called background documents on Eurocodes. It has been prepared to
provide technical insight on the way existing steel structures could be assessed and the remaining
fatigue life could be estimated.
It may be used as a main source of support to:
– further harmonize design rules across different materials, and
– further develop the Eurocodes.
Due to the demand for freight volume on rail and road, traffic has increased significantly in the past years leading to increasing number of heavy vehicles in the traffic flows and greater exploitation of their loading capacities. Because of environmental considerations there is also a tendency to further enhance the admissible loads in the design of new heavy vehicles (e.g. by increasing axle loads or using road trains). This all may affect the safety, serviceability and durability of existing bridges. Bridge authorities are therefore interested in agreed methods to assess the safety and durability of existing bridges and to make appropriate provisions for more refined maintenance methods, possible restriction of traffic, bridge-rehabilitation or substitution of old bridges by new ones where necessary. For steel bridges including the old riveted ones there are numerous approaches to such assessments, partly standardized by national codes or recommendations. In the light of the development of the European single market for construction works and engineering services there is thus a need to harmonize them and to develop agreed European technical recommendations for the safety and durability assessment of existing structures. These recommendations should follow the principles and application rules in the Eurocodes and provide a scheme with different levels of analysis: a basic level with general methods and further levels with higher sophistication that call for specific expertise.
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C for Engineers and Scientists: An Introduction to Programming With ANSI C
Gary J. Bronson, Howard Silver, "C for Engineers and Scientists: An Introduction to Programming With ANSI C "
West Publishing Company | 1993 | ISBN: 0314008160 | 643 pages | PDF | 25,4 MB
This text introduces the C programming language using a range of engineering and science applications in the examples and exercises. The book assumes no programming experience and is suitable for an introduction to programming course (using C instead of Fortran or Pascal). Structured programming principles are introduced early and used throughout. Clear explanations and many example programs (using ANSI C) show C as a powerful tool in engineering and science applications. Includes exercises after each section, common programming error sections, and chapter summaries.
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Hi everyone, I hope someone can upload this paper:
Title: Effects of Transverse Reinforcement and Bonded length on the Side-Blowout Capacity of Headed Reinforcement Author(s): R. A. DeVries, J. O. Jirsa and T. Bashandy Publication: Special Publication Volume: 180 Pages: 367-390 Keywords: Anchorage; bonding; reinforced concrete; slip; transverse reinforcement Date: October 1, 1998
Abstract:
Pullout tests were conducted on deeply embedded headed reinforcement to determine the effect of transverse reinforcement and bonded length on the side-blowout capacity and load-slip behavior of the anchorage. It was found that transverse ties or stirrups in the anchorage zone had little effect on the ultimate capacity. Increases in anchorage capacity were only observed when the head was positively anchored in contact behind a large crossing bar. Transverse reinforcement also had little effect on the load-slip behavior before failure. However, when large amounts of transverse reinforcement were placed near the head, the amount of load maintained after the blowout failure occurred was increased. Additional bonded length of a deformed reinforcing bar increased the anchorage capacity and reduced the head slip for a given load. The amount of increase in capacity can be predicted using current ACI provisions for development length. Design procedures taking into account the effects of transverse reinforcement and bonded length were developed.
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Security and Reliability of Damaged Structures and Defective Materials
Guy Pluvinage, Aleksandar Sedmak - Security and Reliability of Damaged Structures and Defective Materials
Publisher: Springer | 2009-08-01 | ISBN: 9048127912 | PDF | 438 pages | 53.75 MB
Structures that are essential for economy and security such as energy production, transportation and supply, water supply, buildings, are susceptible to failure, because of defects already present in the material, or created at fabrication, or appearing during service. Methods of assessment of the nocivity of these defects are needed, to predict the remaining service life and the eventual emergency of stopping service and repairing, if possible. To reach this objectives, this book presents the last methods derived from the classical linear, non-linear fracture mechanics concepts, including fatigue and notch fracture mechanics. Several examples of structures rehabilitations and repairing are given. This book gathers the presentation made during the Advanced Research Workshop held in Portoroz (Slovenia) in October 2008, under the auspices of NATO Science for Peace and Security Programme. It is edited by Professor Guy Pluvinage from the University Paul Verlaine - Metz (France) and Professor Aleksandar Sedmak from the University of Belgrade, Faculty of Mechanical Engineering. Both have a long and rich experience in analysis of theoretical and practical cases in safety and reliability of structures. Other contributors are all known as experts in the areas of fatigue, facture and reliability of structures.
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L.A. Galin’s book on contact problems is a remarkable work. Actually there are two books: the first, published in 1953 deals with contact problems in the classical theory of elasticity; this is the one that was translated into English in 1961. The second book, published in 1980, included the first, and then had new sections on contact problems for viscoelastic materials, and rough contact problems; this section has not previously been translated into English.
In this new translation, the original text and the mathematical analysis have been completely revised, new material has been added, and the material appearing in the 1980 Russian translation has been completely rewritten.
In addition there are three essays by students of Galin, bringing the analysis up to date.
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Spectral Finite Element Method: Wave Propagation, Diagnostics and Control in Anisotropic and Inhomogeneous Structures (Computational Fluid and Solid Mechanics)
By Srinivasan Gopalakrishnan, Debiprosad Roy Mahapatra, Abir Chakraborty
Book Description:
In recent times, the use of composites and functionally graded materials (FGMs) in structural applications has increased. FGMs allow the user to design materials for a specified functionality and therefore have numerous uses in structural engineering. However, the behaviour of these structures under high-impact loading is not well understood. Spectral Finite Element Method: Wave Propagation, Health Monitoring and Control in Composite and Functionally Graded Structures focuses on some of the wave propagation and transient dynamics problems with this complex media which had previously been thought unmanageable.
By using state-off-the-art computational power, the Spectral Finite Element Method (SFEM) can solve many practical engineering problems. This book is the first to apply SFEM to inhomogeneous and anisotropic structures in a unified and systematic manner. The authors discuss the different types of SFEM for regular and damaged 1-D and 2-D waveguides, various solution techniques, different methods of detecting the presence of damages and their locations, and different methods available to actively control the wave propagation responses. The theory is supported by tables, figures and graphs; all the numerical examples are so designed to bring out the essential wave behaviour in these complex structures. Some case studies based on real-world problems are also presented.
This book is intended for senior undergraduate students and graduate students studying wave propagation in structures, smart structures, spectral finite element method and structural health monitoring. Readers will gain a complete understanding of how to formulate a spectral finite element; learn about wave behaviour in inhomogeneous and anisotropic media; and, discover how to design some diagnostic tools for monitoring the health or integrity of a structure. This important contribution to the engineering mechanics research community will also be of value to researchers and practicing engineers in structural integrity.
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Product Description:
Due to the increase in computational power and new discoveries in propagation phenomena for linear and nonlinear waves, the area of computational wave propagation has become more significant in recent years. Exploring the latest developments in the field, Effective Computational Methods for Wave Propagation presents several modern, valuable computational methods used to describe wave propagation phenomena in selected areas of physics and technology.
Featuring contributions from internationally known experts, the book is divided into four parts. It begins with the simulation of nonlinear dispersive waves from nonlinear optics and the theory and numerical analysis of Boussinesq systems. The next section focuses on computational approaches, including a finite element method and parabolic equation techniques, for mathematical models of underwater sound propagation and scattering. The book then offers a comprehensive introduction to modern numerical methods for time-dependent elastic wave propagation. The final part supplies an overview of high-order, low diffusion numerical methods for complex, compressible flows of aerodynamics.
Concentrating on physics and technology, this volume provides the necessary computational methods to effectively tackle the sources of problems that involve some type of wave motion.
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