ANALYSIS OF THE CENTRE DIAPHRAGM OF A TRAPEZOIDAL STEEL BOX GIRDER

The central support diaphragm of a trapezoidal steel box girder tested at TRRL was analysed using a linear elastic two-dimensional finite element model. Values of stress and displacement obtained using a range of assumptions on boundary conditions are compared with values obtained experimentally. Interaction between the diaphragm and the lower flange was considered to have contributed to an increase in the effective area of the flange acting with the diaphragm. Increasing the area in the model and allowing for an alternative load path around the diaphragm through the lower flange and stiffeners gave stress distributions similar to those obtained experimentally. (A). /TRRL/

• Corporate Authors:

  Transport and Road Research Laboratory (TRRL)

  Wokingham, Berkshire  United Kingdom 
• Authors:
  • Jones, J P
  • Irwin, CAK
• Publication Date: 1976

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 43 p.

Subject/Index Terms

• TRT Terms: Box girders; Bridge design; Bridges; Finite element method; Flanges; Linear elasticity; Loads; Mathematical models; Metal bridges; Mineral dislocations; Motion; Steel bridges; Stiffeners (Plates); Stresses; Structural design; Structural diaphragms
• Uncontrolled Terms: Models; Trapezoidal girders
• Old TRIS Terms: Diaphragms; Stiffeners; Stiffeners (Bridge)
• ITRD Terms: 3474: Box girder; 6490: Finite element method; 5567: Load; 6473: Mathematical model; 5483: Movement; 3435: Stiffener (bridge)
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00138931
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: TRRL SR 101 UC
• Files: ITRD, TRIS
• Created Date: Nov 17 1976 12:00AM