IN-SITU STRESS TESTS - FINDING THE DEAD LOAD STRESSES IN METAL BRIDGES
In-situ stress in metal bridges can be determined by measuring the strains generated when the stress is relieved by mechanical means. This paper describes a method of achieving this whilst imposing virtually no damage to the structure. The method involves placing an array of gauges in a fixed geometrical pattern on the surface of the metal and measuring the relaxation of stresses as a small hole is drilled within the pattern. The procedure is described. The use of an ultra high speed drill induces very little additional stress. An analysis of the results using the ASTM method provides a stress profile in the depth of the hole drilled. Drawbacks and difficulties which may arise are discussed. Of particular importance is identifying the influence of manufacturing stresses. For the covering abstract see IRRD 864951.
SURVEYOR32 VAUXHALL BRIDGE ROAD
LONDON, United Kingdom SW1V 2SS
- Moore, D R
- Publication Date: 1994
- Features: References;
- Pagination: 7 p.
- TRT Terms: Bearing capacity; Conferences; Metal bridges; Nondestructive tests; Stresses; Test procedures
- ITRD Terms: 3085: Bearing capacity; 8525: Conference; 3465: Metal bridge; 6216: Non destructive testing; 5575: Stress (in material); 6288: Test method
- Subject Areas: Data and Information Technology;
- Accession Number: 00668040
- Record Type: Publication
- Source Agency: Transport Research Laboratory
- Files: ITRD
- Created Date: Nov 2 1994 12:00AM