Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Design of Concrete Bridge Decks
The static ultimate strength, fatigue life and failure mode of reinforced concrete highway bridge deck slabs supported on steel girders is determined by testing small-scale deck models under static, fixed pulsating and moving constant wheel-load. The specimens included a 1/6.6 scale bridge model of a 50-ft long prototype bridge deck (with a girder spacing of 7 ft and a slab thickness of 8.5 in.) and a 1/3 scale panel model of a portion of the deck. Both isotropic (steel ratio of 0.3% in both directions in each face - Ontario bridge design code) and orthotropic (steel ratio of 0.7% in longitudinal and 0.35% in transverse direction in each face - AASHTO code) reinforcing arrangements were considered. For the isotropically reinforced decks (43% reduction in steel content compared to the AASHTO design) a safety factor against static ultimate strength equal to 17.5 was determined. The moving wheel-load resulted in far shorter fatigue life than the pulsating load, especially for the orthotropically reinforced decks. The failure mode was punching rather than flexure.
Design of Concrete Bridge Decks
The static ultimate strength, fatigue life and failure mode of reinforced concrete highway bridge deck slabs supported on steel girders is determined by testing small-scale deck models under static, fixed pulsating and moving constant wheel-load. The specimens included a 1/6.6 scale bridge model of a 50-ft long prototype bridge deck (with a girder spacing of 7 ft and a slab thickness of 8.5 in.) and a 1/3 scale panel model of a portion of the deck. Both isotropic (steel ratio of 0.3% in both directions in each face - Ontario bridge design code) and orthotropic (steel ratio of 0.7% in longitudinal and 0.35% in transverse direction in each face - AASHTO code) reinforcing arrangements were considered. For the isotropically reinforced decks (43% reduction in steel content compared to the AASHTO design) a safety factor against static ultimate strength equal to 17.5 was determined. The moving wheel-load resulted in far shorter fatigue life than the pulsating load, especially for the orthotropically reinforced decks. The failure mode was punching rather than flexure.
Design of Concrete Bridge Decks
P. C. Perdikaris (Autor:in) / S. R. Beim (Autor:in)
1988
226 pages
Report
Keine Angabe
Englisch
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