TESTS CARRIED OUT DURING THE CONSTRUCTION OF A LARGE METAL STAYED GIRDER BRIDGE

ESSAIS REALISES PENDANT LA CONSTRUCTION D'UN GRAND PONT METALLIQUE A HAUBANS

Details are given of the main tests carried out during the construction of the stayed girder bridge in Saint-Nazaire. Stresses under permanent loads were measured in sixteen of the stays. The jacking devices used for adjusting the stays were utilized in the measurements. The adjusting sleeve on which the strain gauges were fixed, was released stage by stage, the tensile stress being transmitted to the jacks through bars fitted with gauges and previously calibrated. The evolution in stresses during the different stages of construction was then determined by means of gauges fixed on the adjusting sleeves. Four laser transmitters were employed to measure the deflections. They were placed on the piers and directed two reference beams towards the central span and the span to the bank. The deflections were measured by means of portable sighting rods at 26 points on the structure. This device enabled rapid measurements to be made under static loads and the deflection in the middle of the central span to be determined under moving loads. /TRRL/

• Corporate Authors:

  Laboratoire Central des Ponts et Chausees (LCPC)

  Boulevard Lefebvre 58
  Paris Cedex 15,   France  F-75732
• Authors:
  • Ambrosino, R
  • Bruneau, J
  • CAUSSIGNAC, J M
• Publication Date: 1977-1-2

Language

• French

Media Info

• Features: Figures; Photos; References;
• Pagination: p. 79-84
• Serial:
  • Bulletin de Liaison des Lab des Ponts et Chaussees
  • Issue Number: 87
  • Publisher: Laboratoire Central des Ponts et Chausees (LCPC)

Subject/Index Terms

• TRT Terms: Bridge design; Bridges; Cable stayed bridges; Cables; Construction; Construction sites; Deflection; Dynamics; Girder bridges; Jacks (Mechanical equipment); Lasers; Loads; Measurement; Metals; Statics; Strain gages; Structural analysis; Structural design; Tension; Testing; Tests
• Uncontrolled Terms: Loading; Tensile stress
• Geographic Terms: France
• Old TRIS Terms: Laser applications
• ITRD Terms: 4530: Cable; 3655: Construction; 3628: Construction site; 5586: Deflection; 5473: Dynamics; 8036: France; 3831: Jack; 6772: Laser; 5567: Load; 6136: Measurement; 4543: Metal; 5433: Statics; 3417: Stayed girder bridge; 5562: Strain gauge; 5502: Tension; 6255: Test
• Subject Areas: Bridges and other structures; Construction; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00173353
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: May 31 1978 12:00AM