THE STRUCTURAL BEHAVIOUR OF A PRESTRESSED BOX BEAM WITH THIN WEBS UNDER COMBINED BENDING AND SHEAR

An account is given of the construction and testing of a large single cell prismatic box beam subjected to combined longitudinal and transverse bending and shear. The webs were precast in panels 0.75 M long, had an overall slenderness ratio of 33 and had no longitudinal continuity steel at the joints. The test was carried out at a shear span to depth ratio of 2.78; the specimen failed in web compression. Results presented include the load-overall deflexion diagram, the load-out of plane deflexion of the webs and the load-strain diagram of the concrete struts. The collapse load is compared with the appropriate clause in the Department of Environment technical memoradium. The results are also compared with those obtained from a non-linear finite element analysis and it is concluded that the model test probably underestimates the shear carrying capacity of the corresponding continuous prismatic beam. (A) /TRRL/

• Corporate Authors:

  Institution of Civil Engineers

  One Great George Street, Westminster
  London,   United Kingdom  SW1P 3AA
• Authors:
  • Edwards, A D
• Conference:
  • Institution of Civil Engineers, Proceedings
• Publication Date: 1977-3

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 123-135
• Serial:
  • Volume: 63

Subject/Index Terms

• TRT Terms: Beams; Bending; Box beams; Box girders; Bridge construction; Bridge foundations; Bridges; Calibration; Compression; Construction; Deflection; Failure; Laboratories; Load tests; Mechanical rings; Shear strength; Structural analysis; Structural mechanics; Struts; Testing equipment; Tests; Thinness; Webbing
• Uncontrolled Terms: Continuity; Slenderness ratio; Structural behavior
• Old TRIS Terms: Proving ring
• ITRD Terms: 3472: Beam; 3474: Box girder; 5532: Compression; 5586: Deflection; 5520: Failure; 6237: Laboratory (not an organization); 5531: Shear; 6255: Test; 6247: Test rig
• Subject Areas: Bridges and other structures; Construction; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00153943
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Sep 20 1977 12:00AM