DYNAMIC ANALYSIS AND TESTING OF A MODEL MOTORWAY BRIDGE

The static design and normal mode analysis of a slab bridge, currently under construction for a Scottish new town development corporation, was carried out using the nastran general purpose digital computer program. The bridge deck is skewed and curved in plan, having a mean radius of 90 M, a length of 58.2 M, width 12.3 M and slab thickness 0.8 M. It has a central carriageway of 7.3 M and right and left hand kerbs of 2.5 M. The bridge is supported on flexible mounts at five stations along its length, each support being continuous along the width of the carriageway. The structural idealisation of the deck is shown in addition to the natural frequencies and mode shapes obtained by normal mode analysis. To validate the results of such an analysis experimentally, a 1/50th scale model of the bridge was constructed. Natural frequencies and modes of vibration of the model were determined experimentally and also using nastran. The results are presented and compared in this report. /TRRL/

• Supplemental Notes:
  • Symposium on Dynamic Analysis of Structures, October 8, 1975.
• Corporate Authors:

  Birniehill Institute

  National Engineering Lab, East Kilbride
  Glasgow, ZZ Scotland   
• Authors:
  • MCKINLAY, W P
  • Young, T
• Publication Date: 1975

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 27 p.

Subject/Index Terms

• TRT Terms: Analysis; Bridge decks; Bridge design; Bridges; Computer programs; Conferences; Curved bridges; Design; Forecasting; Mathematical analysis; Mathematical models; Natural frequency; Simulation; Skew bridges; Structural design; Vibration
• Uncontrolled Terms: Models
• ITRD Terms: 6471: Analysis (math); 3455: Bridge; 3482: Bridge deck; 8525: Conference; 3438: Curved bridge; 9011: Design (overall design); 132: Forecast; 6205: Model (not math); 5549: Natural frequency; 9103: Simulation; 3448: Skew bridge; 8645: Software
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00159829
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Dec 27 1977 12:00AM