Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bridge Deck Reinforcement and PCP Cracking: Final Report
Bridge decks composed of precast, prestressed panels (PCPs) overlain by cast-in-place (CIP) are popular in many states, including Texas. Optimization of top-mat reinforcement and reduction of collinear panel cracking were addressed in this project. Longitudinal top-mat reinforcement was found to be already optimized. Further optimization of transverse top-mat reinforcement is possible by slightly reducing the area of deformed reinforcement or by using welded-wire reinforcement. Collinear panel cracking can be reduced by reducing lowering the initial prestress or by placing additional transverse reinforcement at panel ends. Measured prestress losses in PCPs were at most 25 ksi, much less than the 45 ksi currently assumed by TxDOT. The comparative efficiency of different types of high-performance steel fibers was examined. Double-punch testing, appropriately standardized as proposed in this report, is a reliable and repeatable measure of the comparative efficiency of high-performance steel fibers.
Bridge Deck Reinforcement and PCP Cracking: Final Report
Bridge decks composed of precast, prestressed panels (PCPs) overlain by cast-in-place (CIP) are popular in many states, including Texas. Optimization of top-mat reinforcement and reduction of collinear panel cracking were addressed in this project. Longitudinal top-mat reinforcement was found to be already optimized. Further optimization of transverse top-mat reinforcement is possible by slightly reducing the area of deformed reinforcement or by using welded-wire reinforcement. Collinear panel cracking can be reduced by reducing lowering the initial prestress or by placing additional transverse reinforcement at panel ends. Measured prestress losses in PCPs were at most 25 ksi, much less than the 45 ksi currently assumed by TxDOT. The comparative efficiency of different types of high-performance steel fibers was examined. Double-punch testing, appropriately standardized as proposed in this report, is a reliable and repeatable measure of the comparative efficiency of high-performance steel fibers.
Bridge Deck Reinforcement and PCP Cracking: Final Report
O. Bayrak (Autor:in) / S. H. Chao (Autor:in) / J. O. Jirsa (Autor:in) / R. E. Klingner (Autor:in) / U. Azimov (Autor:in)
2013
356 pages
Report
Keine Angabe
Englisch
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