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EBookClubs

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Book Fatigue resistant Design of Cantilevered Signal Sign and Light Supports

Download or read book Fatigue resistant Design of Cantilevered Signal Sign and Light Supports written by Robert Joseph Dexter and published by Transportation Research Board. This book was released on 2002 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Increased Damping in Cantilevered Traffic Signal Structures

Download or read book Increased Damping in Cantilevered Traffic Signal Structures written by G. Scott Riggs and published by . This book was released on 1998 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Transactions of the American Society of Civil Engineers

Download or read book Transactions of the American Society of Civil Engineers written by American Society of Civil Engineers and published by . This book was released on 2003 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. 29-30 contain papers of the International Engineering Congress, Chicago, 1893; v. 54, pts. A-F, papers of the International Engineering Congress, St. Louis, 1904.

Book Full scale Investigation of Wind induced Vibrations of Mast arm Traffic Signal Structures

Download or read book Full scale Investigation of Wind induced Vibrations of Mast arm Traffic Signal Structures written by Hung Nguyen Sinh and published by . This book was released on 2014 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of their inherent flexibility and low damping ratios, cantilevered mast-arm traffic signal structures are susceptible to wind-induced vibrations. These vibrations cause structural stresses and strains to develop in a cyclical fashion which can lead to reduced service life due to fatigue and, in extreme cases, full collapse. In 2001, after the collapse of several of these structures throughout the United States, American Association of State Highway and Transportation Officials (AASHTO) code standards were updated to include fatigue provisions for traffic signal supporting structures. In New York State, there is particular concern regarding structures spanning longer than 14 meters which currently do not meet these updated fatigue provisions. To address this concern, a full-scale experiment was conducted using an existing 25 meter mast-arm traffic signal structure, located in Malta, NY, in which the response of the structure was observed in relation to in-situ wind conditions. In previous studies, high-amplitude vertical vibrations of mast-arm traffic signal structures have been shown to be due to vortex shedding, a phenomenon in which alternatingly shed, low-pressure vortices induce oscillating forces onto the mast-arm causing a cross-wind response. When the frequency of vortices being shed from the mast-arm corresponds to the natural frequency of the structure, a resonant condition is created. The resonant condition causes the long-lasting, high amplitude vibrations, which may lead to the fatigue failure of these structures. Turbulence in the approach flow is known to affect the cohesiveness of vortex shedding. Results from this full-scale experiment indicate that the surrounding terrain conditions, which affect the turbulence intensity of the wind, greatly influence the likelihood of occurrence of long-lasting, high-amplitude vibrations and also impact whether reduced service life due to fatigue is likely to be a concern.

Book Report

Download or read book Report written by and published by . This book was released on 1964 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Development of a Novel Aerodynamic Solution to Mitigate Large Vibrations in Traffic Signal Structures

Download or read book Development of a Novel Aerodynamic Solution to Mitigate Large Vibrations in Traffic Signal Structures written by and published by . This book was released on 2020 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural supports of signs, luminaires, and traffic signals are an integral part of the transportation system. The promising results in this analysis present an opportunity to address the longstanding issue of fatigue-related failures in traffic signal structures. The TRB Highway Innovations Deserving Exploratory Analysis (IDEA) Program's Development of a Novel Aerodynamic Solution to Mitigate Large Vibrations in Traffic Signal Structures considers “aerodynamic damping” as an active means to mitigate the large amplitude vibrations of these structures.

Book Traffic Signal Pole Research damping

Download or read book Traffic Signal Pole Research damping written by University of Wyoming. Department of Civil and Architectural Engineering and published by . This book was released on 2001 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Researches the weakness and failure potential of cantilevered traffic signal structures due to wind-induced fatigue cracks.

Book Applied Mechanics Reviews

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1975 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Vibration Damping of Structural Elements

Download or read book Vibration Damping of Structural Elements written by Chin-Teh Sun and published by Prentice Hall. This book was released on 1995 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vibration and vibration control of structures play a vital research role in mechanical, aerospace, and civil engineering, as well as many industrial and defense-related applications. This volume presents state-of-the-art technology in the area of vibration damping of discrete and continuous structural systems.

Book Mechanical Damping System for Mast Arm Traffic Signal Structures

Download or read book Mechanical Damping System for Mast Arm Traffic Signal Structures written by Michael A. Kalajian and published by . This book was released on 1998 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Structural Vibration

Download or read book Structural Vibration written by C. Beards and published by Elsevier. This book was released on 1996-05-31 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many structures suffer from unwanted vibrations and, although careful analysis at the design stage can minimise these, the vibration levels of many structures are excessive. In this book the entire range of methods of control, both by damping and by excitation, is described in a single volume.Clear and concise descriptions are given of the techniques for mathematically modelling real structures so that the equations which describe the motion of such structures can be derived. This approach leads to a comprehensive discussion of the analysis of typical models of vibrating structures excited by a range of periodic and random inputs. Careful consideration is also given to the sources of excitation, both internal and external, and the effects of isolation and transmissability. A major part of the book is devoted to damping of structures and many sources of damping are considered, as are the ways of changing damping using both active and passive methods. The numerous worked examples liberally distributed throughout the text, amplify and clarify the theoretical analysis presented. Particular attention is paid to the meaning and interpretation of results, further enhancing the scope and applications of analysis. Over 80 problems are included with answers and worked solutions to most. This book provides engineering students, designers and professional engineers with a detailed insight into the principles involved in the analysis and damping of structural vibration while presenting a sound theoretical basis for further study.Suitable for students of engineering to first degree level and for designers and practising engineersNumerous worked examplesClear and easy to follow