Download or read book Vehicle induced Gust Loads on Aluminum Overhead Sign Structures written by Joseph B. Zell and published by . This book was released on 1977 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Highway Transportation Research and Development Studies written by United States. Federal Highway Administration and published by . This book was released on 1971 with total page 958 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book R D Highway Safety Transportation System Studies written by United States. Federal Highway Administration and published by . This book was released on 1973 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Field Testing of Cantilevered Traffic Signal Structures Under Truck induced Gust Loads written by and published by . This book was released on 2007 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Static and Dynamic Behavior of Monotube Span type Sign Structures Volume I Final Report written by M. R. Ehsani and published by . This book was released on 1984 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Shock and Vibration Digest written by and published by . This book was released on 1978 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Selected Library Acquisitions written by United States. Department of Transportation and published by . This book was released on with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mitigating Fatigue of Cantilevered Overhead Sign Structures Due to Natural and Truck induced Wind Gusts written by Mohamed Salah Gallow and published by . This book was released on 2014 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cantilevered overhead sign structures (COSS) are widely used across highways in the U.S. Several cases of failures have been reported for such structures due to fatigue wind loads. The structure's dynamic characteristics such as natural frequency and critical damping are responsible for its behavior during those loads. When the frequency of wind gusts load matches the fundamental frequency of the OSS, resonance occurs, which causes excessive vibrations. Consequently, fatigue stresses in crease and may exceed the fatigue critical limit, resulting in failure. Vibrations and fatigue stresses amplitudes are dependent on the structure's natural frequency. The objective of this study is investigating natural frequencies of COSS in order to mitigate fatigue stresses due to natural and truck-induced wind gusts. Investigating damping and other fatiguee wind loads are out of the scope in this study. Alterations in factors such as the members' configuration, arrangement, sizes, and layout of the structure control its stiffness and mass distribution which controls its natural frequency and consequently, fatigue stresses. A parametric study was considered in order to investigate the effect of these factors and recommend the best layout between 4-chord, 2-chord, and monotube CSS in mitigating fatigue. Structures were designed according to the American Association of State Highway and Transportation Officials (AASHTO) 2013, Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals (mentioned hereafter as the AASHTO Support Specifications (2013)) and modeled using commercial finite element analysis software. Wind pressure power spectral density and time history loading functions were applied on these structures to simulate natural and truck-induced wind gusts, respectively. Eventally, on the contrary of the 2-chord structure, slanted monotube CSS with curved end post was found to have least mass, highest frequency and nearly smallest fatigue stresses.

Download or read book Maintenance of Reflective Signs written by Wayne D. Kenyon and published by . This book was released on 1982 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study examined deterioration of reflective sign sheeting in New York State, and assessed the effectiveness of sign washing and clear-coating for restoring or preserving reflectivity of enclosed-lens engineer-grade sheeting.

Download or read book Highway Research in Progress written by and published by . This book was released on 1975 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1978-09-29 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effectiveness of Flashing Arrow Boards During Moving Maintenance Operations Final Report written by James E. Bryden and published by . This book was released on 1979 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of a Statewide Pavement marking Policy written by James E. Bryden and published by . This book was released on 1988 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book W beam Guiderail Transition from Light to Heavy Posts written by Donald G. Herring and published by . This book was released on 1987 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Crash Tests of Sharply Curved Light post Guiderail Third Interim Report written by J. E. Bryden and published by . This book was released on 1980 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance of Open graded Friction Courses written by Richard W. Miller and published by . This book was released on 1978 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents installation and evaluation of an experimental pavement using an open-graded asphalt friction course, placed as part of the FHWA's Demonstration project 10. Two different open-graded mixes -- one having a maximum aggregate size of 1/2-in and the other 1/4-in -- and a standard NYS 1A top mix were evaluated. Performance of the experimental pavement was determined by measuring air-void content, asphalt cement penetration and viscosity, skid resistance, rutting, and noise, and by visual observations of water drainage and splash and spray by passing traffic in wet weather. Results showed that the open-graded pavements performed better than the standard NYS 1A top.

Download or read book Crash Tests of Portable Concrete Median Barrier for Maintenance Zones written by Jan S. Fortuniewicz and published by . This book was released on 1982 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: