Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Instrumentation and Monitoring of High Performance Concrete Prestressed Bridge Girders
Bridge A5529 in Jefferson County, Missouri was constructed using high performance concrete (HPC) prestressed I-girders. This bridge is Missouri's first high performance concrete bridge. Four of the twenty girders for Bridge A5529 were instrumented to monitor temperatures, strains, and deflections from when the girders were fabricated up to approximately one year in service. Additional laboratory experiments included tests for compression response, fracture characteristics, unrestrained creep and unrestrained shrinkage. The unrestrained creep and shrinkage tests were also performed on cylinders from a companion normal strength concrete (NSC, Bridge A5530) bridge for comparison. The objectives of the instrumentation program included to study the early-age response during curing/hydration, investigate end-zone stresses during prestress transfer, investigate unrestrained creep and shrinkage response of HPC used in the girders and compare them with NSC used typically, examine temperature and strain variations during storage, transport and construction, compare strains and deflections during a load test to analytical predictions, and to examine strains due to daily and seasonal service temperature variations.
Instrumentation and Monitoring of High Performance Concrete Prestressed Bridge Girders
Bridge A5529 in Jefferson County, Missouri was constructed using high performance concrete (HPC) prestressed I-girders. This bridge is Missouri's first high performance concrete bridge. Four of the twenty girders for Bridge A5529 were instrumented to monitor temperatures, strains, and deflections from when the girders were fabricated up to approximately one year in service. Additional laboratory experiments included tests for compression response, fracture characteristics, unrestrained creep and unrestrained shrinkage. The unrestrained creep and shrinkage tests were also performed on cylinders from a companion normal strength concrete (NSC, Bridge A5530) bridge for comparison. The objectives of the instrumentation program included to study the early-age response during curing/hydration, investigate end-zone stresses during prestress transfer, investigate unrestrained creep and shrinkage response of HPC used in the girders and compare them with NSC used typically, examine temperature and strain variations during storage, transport and construction, compare strains and deflections during a load test to analytical predictions, and to examine strains due to daily and seasonal service temperature variations.
Instrumentation and Monitoring of High Performance Concrete Prestressed Bridge Girders
V. S. Gopalaratnam (Autor:in) / M. Eatherton (Autor:in)
2001
176 pages
Report
Keine Angabe
Englisch
Construction Equipment, Materials, & Supplies , Highway Engineering , Girders , Prestressed concrete , Bridges , Instrumentation , Monitoring , Cracking , Creep , Shrinkage , Data acquisition , Laboratory tests , Stresses , Hydration , Thermography , Loads(Forces) , Strains , Highway bridges , Concretes , Temperature , Deflections , Compression tests , High performance concrete , Materials properties
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