PARAMETER STUDY OF THE DYNAMIC RESPONSE OF LUMINAIRE SUPPORT STRUCTURES
A COMPREHENSIVE PARAMETER STUDY WAS CONDUCTED BY USING A MATHEMATICAL MODEL VERIFIED BY FULL-SCALE CRASH TESTS TO INVESTIGATE THE EFFECTS OF VARYING THE SIGNIFICANT PARAMETERS GOVERNING THE RESPONSE OF LUMINAIRE SUPPORT STRUCTURES. MODEL TESTS WERE CONDUCTED OF FOUR DIFFERENT LUMINAIRE SUPPORT POSTS. THE SUPPORT STRUCTURES WERE IMPACTED BY VEHICLES WEIGHING 2500, 3500, AND 4500 LBS., AND THE VEHICULAR VELOCITY WAS VARIED FROM 15 TO 45 MPH FOR EACH VEHICLE. TEST RESULTS SHOWED THATfound (1) THE SLIP-TYPE POST ATTACHMENTS CONFINE IMPACT FORCES TO LOWER LIMITS THAN THE FRANGIBLE-TYPE DESIGN, (2) IMPACTING VELOCITIES OF 20 MPH OR LESS CAUSE THE POST TO FALL ON THE VEHICLE, (3) IMPACTING VELOCITIES OF 30 MPH MAY CAUSE THE TALLER POST INSTALLATIONS TO CLIP THE REAR OF THE VEHICLE AFTER HITTING THE GROUND, (4) HIGH IMPACTING VELOCITIES CAUSE THE POST TO CLEAR THE VEHICLE, BUT THIS MAY CREATE A HAZARDOUS CONDITION IF THE POST LANDS ON THE ROADWAY, (5) AN INCREASE IN THE VEHICULAR APPROACH ANGLE NORMALLY CAUSES THE POST STRUCTURE TO HAVE A TERMINAL POSITION FURTHER FROM THE ROADWAY, (6) THE TALLER POST INSTALLATIONS HAVE A GREATER TENDENCY TO FALL ON THE VEHICLE AFTER IMPACT.
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Supplemental Notes:
- Paper sponsored by Committee on Guardrails, Median Barriers, and Sign, Signal and Lighting Supports and presented at the 48th Annual Meeting. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
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Authors:
- MARTINEZ, J E
- Morgan, B E
- Publication Date: 1969
Media Info
- Media Type: Digital/other
- Features: References;
- Pagination: pp 3-5
- Monograph Title: Development of safer roadside structures and protective systems
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Serial:
- Highway Research Record
- Issue Number: 259
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Approach; Crash tests; Crashes; Dynamic loads; Impacts; Luminaires; Mathematical models; Posts; Slip (Fluid mechanics); Specimens; Street lighting; Structural supports; Testing; Vehicles; Velocity
- Uncontrolled Terms: Approach angle; Dynamic response; Model tests; Slips
- Old TRIS Terms: Full scale specimens; Supports
- Subject Areas: Highways; Research; Safety and Human Factors; Vehicles and Equipment;
Filing Info
- Accession Number: 00220474
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Aug 11 1994 12:00AM