A TWO-STAGE PROCEDURE FOR THE NON-LINEAR ANALYSIS OF SLAB BRIDGES

Validation of the predictions of non-linear analysis of reinforced concrete slabs has tended to concentrate on monotonic loading to failure. Although this is useful, it is limited in value as most bridge slabs are subjected to many load patterns, and cracking develops as a result of repetitive and long term loading. To enable non-linear analysis to provide information under more realistic conditions, a two-stage procedure is proposed. For the first stage, the strains in the existing slab are determined using simplified loading and material property models. In the second stage, to calculate the effects of an overload, or a structural modification, an approximate tangent stiffness matrix of the cracked slab is determined. This is then used with short term stress-strain curves, and the live loading, to determine the additional stresses. Results of tests and analysis of two 45 degree skew slabs with different steel arrangements are compared. Although the slab responses to loading were quite different, the method gave reasonable predictions of behaviour. (Author/TRRL)

• Corporate Authors:

  Thomas Telford Limited

  London,   United Kingdom 
• Authors:
  • Cope, R J
  • Rao, P V
• Conference:
  • Institution of Civil Engineers, Proceedings, Pt2
• Publication Date: 1983-12

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 671-688
• Serial:
  • Volume: 75

Subject/Index Terms

• TRT Terms: Analysis; Behavior; Bridge decks; Cracking; Deformation; Deformation curve; Forecasting; Fracture mechanics; Live loads; Loads; Mathematical analysis; Nonlinear systems; Oversize loads; Reinforced concrete; Skew bridges; Slabs; Stresses; Tests
• Uncontrolled Terms: Nonlinearity; Overloads
• ITRD Terms: 6471: Analysis (math); 9001: Behaviour; 3482: Bridge deck; 5211: Cracking; 5595: Deformation; 132: Forecast; 5567: Load; 4794: Reinforced concrete; 3448: Skew bridge; 6255: Test
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00382452
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Apr 30 1984 12:00AM