Overview:
EN 50423-1:2005 applies to bare and covered conductor overhead lines and overhead insulated cable systems with nominal voltage exceeding AC 1 kV up to and including AC 45 kV and with rated frequencies below 100 Hz.
In general the requirements in EN 50341-1 apply. This standard specifies additional requirements and simplifications that apply only for this voltage range. In connection with EN 50341-1, this standard specifies the general requirements that shall be met for the design and construction of new overhead lines to ensure that the line is suitable for its purpose with regard to safety of persons, maintenance, operation and environmental considerations.
EN 50423-1:2005 does not apply to:
overhead electric lines inside closed electrical areas as defined in HD 637 S1
catenary systems of electrified railways unless explicitly required by another standard.
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Author: Stephen P. Timoshenko | Size: 69.6 MB | Format:PDF | Quality:Scanner-Double sided | Publisher: Dover Publications | Year: February 1, 1983 | pages: 452 | ISBN: 0486611876ISBN13: 978-0486611877
This excellent historical survey of the strength of materials features many references to the theories of elasticity and structure.
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Concrete information for long-lasting concrete projects
This book is an all-new hardworking visual guide to the most popular home concrete and masonry projects, endorsed by the biggest manufacturer of concrete products in North America. Readers can save hundreds or even thousands of dollars with this book, since concrete materials are one of the least expensive and long lasting of all building materials.
Quikrete Guide to Concrete includes the most common home repairs, but goes a step further by offering some of the most exciting new techniques for building concrete countertops and form-cast landscaping features, as well as techniques for coloring and texturing concrete for designer finishes.
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Hi
I would highly appreciate if someone could share these publications:
1- Load transfer from a raft to a pile with an interposed layer
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3- Centrifuge modelling of piled raft foundations on clay
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4- Piled rafts in overconsolidated clay: comparison of in situ measurements and numerical analyses
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5 - Settlement of piled foundations using equivalent raft approach
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Almost all books available on fracture mechanics cover the majority of topics presented in this book, and often much, much more. While great as references, this makes teaching from them more difficult because the materials are not typically presented in the order that most professors cover them in their lectures and more than half the information presented is not covered in an introductory course at all.
Focusing on the needs of students and professors, Fundamentals of Fracture Mechanics offers an introduction to the discipline through careful editing and mindfulness toward the audience. The book begins with a review of the fundamentals of continuum mechanics and the theory of elasticity relevant to fracture mechanics. The following material has been carefully selected, only including topics important enough to be covered in a first course on fracture mechanics. Except for the last chapter, no advanced topics are covered. Therefore, instructors of elementary fracture mechanics courses can easily cover the entire book in a three-unit graduate-level course without having to spend too much time picking and choosing appropriate topics for the course from the vast knowledge presented in most fracture mechanic books available today.
Drawing on over 20 years of teaching, the author supplies practical and useful resources, including practice exercises designed to facilitate enjoyable learning and reference for further study. His clear, concise coverage of essential information makes the book ideal not only for an introductory course but also for self-study.
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This new edition of Frozen Ground Engineering gives a peerless presentation of soil mechanics for frozen ground conditions and a variety of frozen ground support systems used on construction projects worldwide.
An authoritative update of the industry standard, this Second Edition covers the essential theory, applications, and design methods using frozen ground in the construction of deep shafts, tunnels, deep excavations, and subsurface containment barriers. New material features design models for pavement structures used in seasonal frost and permafrost areas, new information on the movement of fluid phase contaminants in frozen ground, and helpful appendices offering guidance on common frozen ground tests and SI unit conversions.
This new edition gives the essential information engineers, geologists, and students need in a complete reference, including up-to-date information on:
Sensitivity of frozen ground to climate change
Experimental work on frozen soil creep and strength
Monitoring creep in frozen slopes
Frost protection of foundations using ground insulation
Highway insulation
Load restrictions for seasonal frost areas
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Updated from the 2004 edition, modeling lets designers predict the performance of water distribution systems to solve a wide variety of design, operational, and water quality problems. This basic primer manual provides distribution engineers and operators with information on developing and using computer hydraulic models of water distribution systems. Chapters take the reader from basics through data collection, model design, calibration, and applications.
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A computer vision-based approach for structural displacement measurement
Journal:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010
Author:
Yunfeng Ji
Paper Abstract:
Along with the incessant advancement in optics, electronics and computer technologies during the last three decades, commercial digital video cameras have experienced a remarkable evolution, and can now be employed to measure complex motions of objects with sufficient accuracy, which render great assistance to structural displacement measurement in civil engineering. This paper proposes a computer vision-based approach for dynamic measurement of structures. One digital camera is used to capture image sequences of planar targets mounted on vibrating structures. The mathematical relationship between image plane and real space is established based on computer vision theory. Then, the structural dynamic displacement at the target locations can be quantified using point reconstruction rules. Compared with other tradition displacement measurement methods using sensors, such as accelerometers, linear-variable-differential-transducers (LVDTs) and global position system (GPS), the proposed approach gives the main advantages of great flexibility, a non-contact working mode and ease of increasing measurement points. To validate, four tests of sinusoidal motion of a point, free vibration of a cantilever beam, wind tunnel test of a cross-section bridge model, and field test of bridge displacement measurement, are performed. Results show that the proposed approach can attain excellent accuracy compared with the analytical ones or the measurements using conventional transducers, and proves to deliver an innovative and low cost solution to structural displacement measurement.
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