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Field Verification of Camber Estimates for Prestressed Girders.
| 题名： | Field Verification of Camber Estimates for Prestressed Girders. |
| 作者： | BLOOMQUIST, D.; COOK, R. A.; SANEK, J. E. |
| 关键词： | *Highway-bridges; *Girders-; *Camber-.;Prestressed-concrete; Structural-forms; Tests-; Measurement-; Florida-; Deflection-; Highway-bridges; Prediction-models; Estimates-. |
| 摘要： | Prestressed concrete girders are used on many of Florida's bridges. These girders are subject to camber, the upward deflection of the girder due to the eccentricity of the prestressing force. Differences have been found between camber predicted by the design program employed by the FDOT and the measured field camber for prestressed Bulb-Tee girders. These differences can cause changes and delays during construction because of corrections to build-up and/or bearings of the bridge superstructure. The focus of this investigation was to obtain field measurements of camber on large prestressed girders over an extended period of time. This information was used to evaluate the current camber prediction model used by the FDOT. Specifically, the types of girders monitored for this project were (1) the 78-inch Florida Bulb-Tee girder, (2) the AASHTO Type IV girder, and (3) the AASHTO Type V girder. |
| 报告类型： | 科技报告 |
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