A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Predicting Time-Dependent Deformations of Prestressed Concrete Girders
Camber prediction plays an important role in the construction planning of prestressed concrete girders. An accurate prediction is essential to avert unexpected cost and construction delays. The purpose herein is to compare the accuracy of the creep and shrinkage models such as AASHTO LRFD, ACI 209R-92, and fib MC 2010 on strain, curvature, and camber predictions. The experimental data were gathered from fifty-one full-scale girders including AASHTO BT-54, BT-72, and Type I and T-Beams. Compressive strengths at 28 days varied between 43 and 94 MPa. The ALCAMBER v1.0 software, utilizing a time-steps approach, was developed for the predictions and made available online. The results demonstrated that the camber growth and the growth of prestress losses were not accurately predicted and were overpredicted on average. The growth predictions up to the girder erection were most accurately predicted in terms of (i) prestress losses by AASHTO LRFD with an error of 68% and (ii) camber growth by ACI 209 with an error of 51%.
Predicting Time-Dependent Deformations of Prestressed Concrete Girders
Camber prediction plays an important role in the construction planning of prestressed concrete girders. An accurate prediction is essential to avert unexpected cost and construction delays. The purpose herein is to compare the accuracy of the creep and shrinkage models such as AASHTO LRFD, ACI 209R-92, and fib MC 2010 on strain, curvature, and camber predictions. The experimental data were gathered from fifty-one full-scale girders including AASHTO BT-54, BT-72, and Type I and T-Beams. Compressive strengths at 28 days varied between 43 and 94 MPa. The ALCAMBER v1.0 software, utilizing a time-steps approach, was developed for the predictions and made available online. The results demonstrated that the camber growth and the growth of prestress losses were not accurately predicted and were overpredicted on average. The growth predictions up to the girder erection were most accurately predicted in terms of (i) prestress losses by AASHTO LRFD with an error of 68% and (ii) camber growth by ACI 209 with an error of 51%.
Predicting Time-Dependent Deformations of Prestressed Concrete Girders
Springer Tracts on Transportation, Traffic
Gülkan, Polat (editor) / Caner, Alp (editor) / Memisoglu Apaydin, Nurdan (editor) / Isbiliroglu, Levent (author) / Barnes, Robert W. (author) / Mante, David M. (author)
2021-04-28
11 pages
Article/Chapter (Book)
Electronic Resource
English
Prestressed steel girders carry prestressed concrete floor
Engineering Index Backfile | 1964
Launching precast prestressed concrete girders
| Engineering Index Backfile | 1960
Time-Dependent Behaviors of Prestressed Concrete Track Girders under Sustained Loads
| Online Contents | 2013