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Simplified Element-Based Model to Estimate Strain-Related Prestress Loss in Pretensioned Simply Supported Bridge Girders
While models to study prestress losses based on cylinder data are valuable for their flexibility and ability to investigate micro-phenomena, calibration of models based on girder data is also valuable for some applications. More specifically, data obtained from the monitoring of girders captures the effects of physical phenomena taking place within a girder section, effects that are not accurately captured with cylinder testing (e.g. irregular sectional geometry and variable stress history). While general methods are aimed at a broad range of cases, it is intuitive that less complexity is necessary in a method aimed to a singular type of structure. The development of such a method, for use on pretensioned, simply-supported girders is briefly summarized herein. This model provides simple numerical estimates for strain-related prestress losses, and retains the transparency of basic creep and shrinkage models. The model was calibrated using full-scale structural test data.
Simplified Element-Based Model to Estimate Strain-Related Prestress Loss in Pretensioned Simply Supported Bridge Girders
While models to study prestress losses based on cylinder data are valuable for their flexibility and ability to investigate micro-phenomena, calibration of models based on girder data is also valuable for some applications. More specifically, data obtained from the monitoring of girders captures the effects of physical phenomena taking place within a girder section, effects that are not accurately captured with cylinder testing (e.g. irregular sectional geometry and variable stress history). While general methods are aimed at a broad range of cases, it is intuitive that less complexity is necessary in a method aimed to a singular type of structure. The development of such a method, for use on pretensioned, simply-supported girders is briefly summarized herein. This model provides simple numerical estimates for strain-related prestress losses, and retains the transparency of basic creep and shrinkage models. The model was calibrated using full-scale structural test data.
Simplified Element-Based Model to Estimate Strain-Related Prestress Loss in Pretensioned Simply Supported Bridge Girders
Gallardo, J. (Autor:in) / Garber, D. (Autor:in) / Deschenes, D. (Autor:in) / Bayrak, O. (Autor:in)
10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures ; 2015 ; Vienna, Austria
CONCREEP 10 ; 1457-1467
18.09.2015
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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