IMPACT BEHAVIOR OF SIGN SUPPORTS - II, A STAFF PROGRESS REPORT

THE IMPACT BEHAVIOR OF CERTAIN TYPES OF SIGN SUPPORTS IS BEING STUDIED. PART A' PHENOMENOLOGICAL BEHAVIOR OF SIGN SUPPORTS, IS BASED ON OBSERVATIONS OF MOTION PICTURE FILMS OF 27 CRASH TESTS ENCOMPASING SEVERAL DIFFERENT TYPES OF SIGN SUPPORTS. FOLLOWING A DESCRIPTION OF CRASH TEST PROCEDURES IS A SECTION DESCRIBING THE TESTS ON SMALL GORE TYPE SIGNS EACH CONSISTING OF TWO SUPPORTS WITH A 5-FOOT BY 6-FOOT SIGN. THE SLIP BASES USED WERE EITHER HORIZONTAL OR INCLINED AT 10 DEGREES. ALL BUT TWO OF THE TESTS WERE CONDUCTED ON STEEL SUPPORT POSTS. THE FINAL TWO TESTS WERE CONDUCTED ON WOOD POST SUPPORTS, ONE OF WHICH WAS A PENNSYLVANIA DESIGN AND THE OTHER A TEXAS TRANSPORTATION INSTITUTE DESIGN. SOME PRELIMINARY TESTS OF MECHANICAL FUSES WERE PERFORMED IN ORDER TO DETERMINE THE FEASIBILITY OF USING A NOTCHED PLATE INSTEAD OF A CAST IRON PLATE FOR THE MECHANICAL FUSE. SINGLE AND DUAL PIPE SUPPORTS FOR SMALL SIGNS WERE TESTED WITH SLIP BASES IN HORIZONTAL POSITION AND INCLINED AT 10 AND 20 DEGREES. PART B' AN ANALYTICAL STUDY OF BREAK-AWAY SIGN SUPPORTS FOR ROADSIDE SIGNS, DESCRIBES SIX FULL-SCALE CRASH TESTS WHICH PROVIDED HIGHSPEED MOTION PICTURE RECORDS, ACCELEROMETER RECORDS, AND ELECTRIC RESISTANCE STRAIN GAGE RECORDS. THE DEVELOPMENT OF A MATHEMATICAL MODEL EXPRESSING THE SUPPORT POST BEHAVIOR IS DESCRIBED.

• Supplemental Notes:
  • Hpr-1/5/, 68-2
• Corporate Authors:

  Texas State Department of Highways & Public Transp

  11th and Brazos Streets
  Austin, TX  United States  78701
• Authors:
  • Rowan, N J
  • Olson, R M
  • Gaddis, A M
  • Edwards, T C
  • Williams, T G
  • Hawkins, D L
• Publication Date: 1965-9

Subject/Index Terms

• TRT Terms: Accelerometers; Behavior; Breakaway supports; Cast iron; Crash tests; Crashes; Impacts; Mathematical models; Motion pictures; Pipe; Resistance (Electricity); Sign supports; Signs; Steel; Strain gages; Structural plates; Structural supports; Testing; Wood
• Uncontrolled Terms: Plates
• Old TRIS Terms: Electrical strain gages; Notch; Sign structures; Supports
• Subject Areas: Geotechnology; Highways; Materials; Research;

Filing Info

• Accession Number: 00215835
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS, ATRI, STATEDOT
• Created Date: May 1 1994 12:00AM