A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Strengthening of Existing Bridges Using Epoxy Injection
A low viscosity epoxy was pressure injected between portions of the concrete slab and steel stringers of a non-composite highway bridge to determine if the structure could be strengthened by inducing composite action. The slab was jacked off the girders different distances to find an acceptable separation for satisfactory flow of the epoxy. After epoxy injection, the slab was cut into sections which were stripped from the girders. Epoxy did not penetrate between the slab and girder where the slab was not first raised. A 0.8 mm (1/32 in.) shimmed separation was required for flow, and then epoxy covered only 60 percent of the flange surface. Push-off tests of several slab sections showed that the natural bond between the concrete slab and steel girders was greater than the concrete-epoxy-steel connection. It was concluded that the epoxy injection technique shows only marginal promise for strengthening of existing bridges but that the natural bond might be inducing significant composite behavior.
Strengthening of Existing Bridges Using Epoxy Injection
A low viscosity epoxy was pressure injected between portions of the concrete slab and steel stringers of a non-composite highway bridge to determine if the structure could be strengthened by inducing composite action. The slab was jacked off the girders different distances to find an acceptable separation for satisfactory flow of the epoxy. After epoxy injection, the slab was cut into sections which were stripped from the girders. Epoxy did not penetrate between the slab and girder where the slab was not first raised. A 0.8 mm (1/32 in.) shimmed separation was required for flow, and then epoxy covered only 60 percent of the flange surface. Push-off tests of several slab sections showed that the natural bond between the concrete slab and steel girders was greater than the concrete-epoxy-steel connection. It was concluded that the epoxy injection technique shows only marginal promise for strengthening of existing bridges but that the natural bond might be inducing significant composite behavior.
Strengthening of Existing Bridges Using Epoxy Injection
L. F. Kahn (author) / K. M. Will (author) / P. H. Sanders (author) / J. A. Soltesz (author)
1979
78 pages
Report
No indication
English
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