TEE MEMBERS WITH LARGE WEB OPENINGS

RESULTS ARE PRESENTED OF AN EXPERIMENTAL STUDY OF MODEL AND FULL SIZE PRESTRESSED CONCRETE T-BEAMS WITH LARGE WEB OPENINGS. CONSIDERABLE INTEREST WAS GENERATED IN THE POSSIBILITY OF PROVIDING T-BEAMS WITH LARGE WEB OPENING TO ACCOMMODATE COMPLEX MECHANICAL AND AIR-CONDITIONING SYSTEMS WHICH REQUIRE A LARGE NUMBER OF DUCTS AND PIPES. THE DESIGN RESEARCH PROGRAM HAD THE FOLLOWING OBJECTIVES: (1) TO PROVIDE SUFFICIENT EXPERIMENTAL INFORMATION TO PERMIT THE DESIGN OF TEES WITH LARGE WEB OPENINGS, (2) TO CONFIRM THE VALIDITY OF SUCH A DESIGN BY TESTING A FULLSIZE T-BEAM TO FAILURE, (3) TO ASSESS THE SAVINGS IN MATERIAL AND IN WEIGHT (TRANSPORTED AND ERECTED) WHICH MIGHT PARTIALLY OFFSET THE COST OF FORMING THE WEB OPENINGS. TESTS OF MODEL T-BEAMS WERE MADE IN A STRUCTURAL LABORATORY AND THE RESULTS FROM THESE TESTS WERE USED TO DESIGN A FULL-SIZE T-BEAM. ULTIMATE MOMENTS CARRIED BY THE MODEL TEST BEAMS WERE TWO TO THREE TIMES THE MOMENT AT WHICH FLEXURAL CRACKING WAS FIRST OBSERVED. THE ULTIMATE MOMENT CARRIED BY THE FULL-SIZE BEAM (120 FT SPAN) WAS EQUAL TO 1.5 DEAD LOAD PLUS 1.8 DESIGN LIVE LOAD. IT IS CONCLUDED THAT THE DESIRABILITY OF PROVIDING LARGE WEB OPENINGS IN SINGLE-TEE MEMBERS IS OF SUFFICIENT IMPORTANCE TO THE INDUSTRY THAT FURTHER TESTING AND ANALYSIS IS JUSTIFIED.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08879672
• Supplemental Notes:
  • Vol 12, No 4, PP 52-65, 13 FIG, 1 TAB
• Authors:
  • Ragan, H S
  • Warwaruk, J
• Publication Date: 1967-8

Media Info

• Serial:
  • PRECAST/PRESTRESSED CONCRETE INSTITUTE. JOURNAL
  • Publisher: Precast/Prestressed Concrete Institute
  • ISSN: 0887-9672

Subject/Index Terms

• TRT Terms: Air conditioning systems; Beams; Cooling equipment; Economic analysis; Failure; Flexure; Fracture mechanics; Openings; Prestressed concrete; Prestressing; Spacing; Structural design; T beams; Testing; Ultimate strength; Webbing
• Uncontrolled Terms: Model tests
• Subject Areas: Bridges and other structures; Economics; Highways;

Filing Info

• Accession Number: 00208360
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 8 1994 12:00AM