Photoelastic Model of Bridge Cross-Frame Junction

by Alex S. Redner, (A.M.ASCE), Vice Pres.; Research and Development Photoelastic Div., Vishay Intertechnology, Inc., Malvern, Pa.,
Leonard Pompa, Technical Contract Mgr.; Lukens Steel Co., Coatesville, Pa.,


Serial Information: Journal of the Engineering Mechanics Division, 1976, Vol. 102, Issue 4, Pg. 659-670


Document Type: Journal Paper

Abstract: During the construction of the Bryte Bend Bridge on Interstate 880 near Sacramento, Calif., a crack developed in the main flange. A photoelastic model was constructed and analyzed to determine experimentally the prevailing stresses. The stress at the weld connecting the cross-frame strut to the main flange, where the crack originated, was measured. The results indicate that the welding of the strut produced a change in geometry, creating a threefold increase in the stress, when compared to the unwelded design.

Subject Headings: Stress distribution | Structural models | Frames | Bridges | Struts | Flanges | Cracking | Infrastructure construction | Stress analysis | Welded connections | Bending (structural) | North America | California | United States | Sacramento

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