Heat‐Straightening Prototype Damaged Bridge Girders
Publication: Journal of Structural Engineering
Volume 115, Issue 7
Abstract
While heat‐straightening techniques have been used to repair damaged steel bridge girders for a number of years, little experimental data documenting behavior are available. The purpose of this paper is to describe an experimental program in which prototype steel girders were damaged and restraightened. To simulate an actual bridge, a test facility was constructed which was capable of handling girders up to 3 ft deep and 40 ft long. Two girders were damaged and heat‐straightened twice each with the behavior measured after each heating cycle. The results of these tests indicate that a distinct advantage is obtained by applying external forces prior to heating, that all plastically deformed areas should be heated, yield lines should be heated with line heats and yield zones by vee heats, and that repetitive damage can be repaired by heat‐straightening without affecting the strength of the structure.
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References
1.
Avent, R. R. (1987). “Use of heat straightening techniques for repair of damaged steel structural elements in bridges.” Phase I: Interim Rept., Louisiana Transp. Res. Ctr., Louisiana State Univ., Baton Rouge, La.
2.
Boudreaux, R. J. (1987). “Heat straightening of steel: Identifying the important parameters and predicting member response,” thesis presented to Louisiana State University at Baton Rouge, La., in partial fulfillment of the requirements for the degree of Master of Science.
3.
Brockenbrough, R. L. (1970). “Theoretical stresses and strains from heat curving.” J. Struct. Div., ASCE, 96(7), 1421–1444.
4.
Holt, R. E. (1971). “Primary concepts in flame bending.” Welding Engr., 56(6), 416–424.
5.
Holt, R. E. (1965). “Flame straightening basics.” Welding Engr., 50(9), 49–53.
6.
“How fire destroyed and fire repaired air force hangers.” (1959). Engrg. News Rec., Jun. 18, 50–53.
7.
“Kinks go up in flames.” (1981). Engrg. News Rec., Apr. 9, 17.
8.
Moberg, K. L. (1979). “Damage assessment and contraction straightening of steel structures,” thesis presented to the University of Washington, in partial fulfillment of the requirements for the degree of Master of Science.
9.
Newman, E. M. (1959). “Repair of fire damaged structural steel.” Military Engr., 344, Nov.–Dec., 448–450.
10.
Nicholls, J. I., and Weerth, D. E. (1972). “Investigation of triangular heats applied to mild steel plates.” Engrg. J., AISC, Oct., 137–141.
11.
Roeder, C. W. (1986). “Experimental study of heat induced deformation.” J. Struct. Engrg., ASCE, 112(10), 2247–2262.
12.
Roeder, C. W. (1987). “Predictions of deformations due to heat curving.” Bridges and Transmission Line Structures, ASCE, New York, N.Y., 101–110.
13.
Rothman, R. L. (1973). “Flame straightening quenched and tempered steels in ship construction.” Rept. No. 247, Ship Structs. Committee.
14.
Rothman, R. L., and Monroe, R. E. (1973). “Effect of temperature and strain upon ship steels.” Rept. No. 235, Ship Structs. Committee.
15.
Shanafelt, G. O., and Horn, W. G. (1984). “Guidelines for evaluation and repair of damaged steel bridge members.” NCHRP Rept. No. 271, Transp. Res. Board, Nat. Res. Council, Washington, D.C., June.
16.
Yoch, A. E. (1957). “Flame cambering of beams for bridges.” Welding Engr., 42(2).
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Copyright © 1989 ASCE.
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Published online: Jul 1, 1989
Published in print: Jul 1989
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