Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Time-Dependent Deformation Behavior of Prestressed High Performance Concrete Bridge Beams
The primary objective of this research program was to develop guidelines for the design and construction of highway bridge structures that utilize high performance concrete. These guidelines were developed by monitoring the entire construction process for an actual bridge project. Furthermore, this study documented several benefits that could be realized through the use of high performance concrete. The site that has been chosen for the implementation of this resarch was the Louetta Road Overpass on State of Texas Highway 249 in Houston Texas. The objective of this portion of the research program was to monitor the long-term deformation behavior of pretesioned high performance concrete bridge girders. This study focused on the field instrumentation of twelve high performance concrete Texas Type U54 beams pretensioned with 15.2 mm-diameter low-relaxation strands. Beam cambers and deflections, concrete strains, and concrete temperatures were monitored from transfer of prestressing force through placement of the precast concrete deck panels and cast-in-place concrete deck on the girders in the bridge. The measured cambers and prestress losses were compared to predicted values obtained using current design and analysis procedures. This study presents preliminary design considerations for estimating the long-term behavior of pretensioned high performance concrete girders.
Time-Dependent Deformation Behavior of Prestressed High Performance Concrete Bridge Beams
The primary objective of this research program was to develop guidelines for the design and construction of highway bridge structures that utilize high performance concrete. These guidelines were developed by monitoring the entire construction process for an actual bridge project. Furthermore, this study documented several benefits that could be realized through the use of high performance concrete. The site that has been chosen for the implementation of this resarch was the Louetta Road Overpass on State of Texas Highway 249 in Houston Texas. The objective of this portion of the research program was to monitor the long-term deformation behavior of pretesioned high performance concrete bridge girders. This study focused on the field instrumentation of twelve high performance concrete Texas Type U54 beams pretensioned with 15.2 mm-diameter low-relaxation strands. Beam cambers and deflections, concrete strains, and concrete temperatures were monitored from transfer of prestressing force through placement of the precast concrete deck panels and cast-in-place concrete deck on the girders in the bridge. The measured cambers and prestress losses were compared to predicted values obtained using current design and analysis procedures. This study presents preliminary design considerations for estimating the long-term behavior of pretensioned high performance concrete girders.
Time-Dependent Deformation Behavior of Prestressed High Performance Concrete Bridge Beams
K. A. Byle (Autor:in) / N. H. Burns (Autor:in) / R. L. Carrasquillo (Autor:in)
1997
240 pages
Report
Keine Angabe
Englisch
Deformation Behavior of Long-Span Prestressed High Performance Concrete Bridge Girders
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