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Fatigue Loading And Design Methodology For High Mast Lighting Towers

Fatigue Loading and Design Methodology for High Mast Lighting Towers PDF

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Author: Robert J. Connor
Publisher: Transportation Research Board
ISBN: 0309214033
Size: 78.35 MB
Format: PDF
Category : Roads
Languages : en
Pages : 72
View: 1990

Book Description: TRB’s National Cooperative Highway Research Program (NCHRP) Report 718: Fatigue Loading and Design Methodology for High-Mast Lighting Towers provides criteria for the fatigue design of high-mast lighting towers.


Design Of Structures 2004

Design of Structures  2004 PDF

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Author: National Research Council (U.S.). Transportation Research Board
Publisher:
ISBN:
Size: 63.48 MB
Format: PDF, Kindle
Category : Bridges
Languages : en
Pages : 261
View: 1075

Book Description:


Concept Development Of A Bullnose Guardrail System For Median Applications

Concept Development of a Bullnose Guardrail System for Median Applications PDF

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Author: Bob W. Bielenberg
Publisher:
ISBN:
Size: 74.39 MB
Format: PDF, ePub, Docs
Category : Impact
Languages : en
Pages : 93
View: 6146

Book Description: The research study consisted of the design, fabrication, and full-scale vehicle crash testing of a bullnose barrier concept for the end treatment of median hazards. The bullnose concept consisted of a 12-gauge thrie beam rail supported by twenty-two wood posts, eleven posts on each side of the system. Horizontal slots were cut in the valleys of selected thrie beam sections to aid in vehicle capture as well as to reduce the buckling and bending capacities of the rail. Two full-scale crash tests were performed, the first using a 2000-kg pickup truck and the second using an 820-kg small car. The first test, impacting at a speed of 101.4 km/h and an angle of 0.1 degrees at a 1/4-point offset, was unsuccessful. Although the vehicle showed no potential for vehicle override, the thrie beam ruptured causing uncontrolled penetration of the vehicle behind the barrier. Consequently, the bullnose system was modified to include additional breakaway posts and horizontal slots in other thrie beam sections. The second test, impacting at a speed of 103.3 km/h and an angle of 3.4 degrees was determined to be successful according to the safety standards set forth by the Test Level 3 evaluation criteria described in the National Cooperative Highway Research Program (NCHRP) Report No. 350, "Recommended Procedures for the Safety Performance Evaluation of Highway Features". The data and information gathered from the development phase of this project will be used in the development of a computer simulation LS-DYNA model of the bullnose system as well as an improved bullnose guardrail design.


Roadside Design Guide

Roadside Design Guide PDF

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Author: American Association of State Highway and Transportation Officials. Task Force for Roadside Safety
Publisher:
ISBN:
Size: 31.88 MB
Format: PDF
Category : Roads
Languages : en
Pages : 286
View: 7271

Book Description:


Report

Report PDF

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Author:
Publisher:
ISBN:
Size: 44.73 MB
Format: PDF, Mobi
Category : Highway research
Languages : en
Pages :
View: 860

Book Description: