Multiscale modeling of damage and time dependent behavior of reinforced and prestressed concrete structures
Authors
Abdellatef, Mohamed
ORCID
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Other Contributors
Alnaggar, Mohammed
O'Rourke, Michael J.
Symans, Michael D.
Cusatis, Gianluca
O'Rourke, Michael J.
Symans, Michael D.
Cusatis, Gianluca
Issue Date
2018-08
Keywords
Civil engineering
Degree
PhD
Terms of Use
This electronic version is a licensed copy owned by Rensselaer Polytechnic Institute, Troy, NY. Copyright of original work retained by author.
Full Citation
Abstract
In this research, a detailed procedure for effective calibration was introduced by decoupling the different phenomena in the experimental tests during the calibration process. This procedure maximizes the robustness of the calibration process and improves the predictability of the framework by reducing the interdependency of model parameters during the calibration process. The third project was based on the successes of the previous one. In this project, a steel relaxation model was coupled with the framework to account for prestressing losses under varying stress and environmental conditions. To show the predictive capabilities of the framework, it was calibrated using lab-size specimens, then it was able to predict blindly the time dependent behavior of full size post-tensioned beams. Finally, the fourth project studied the reduction of the large computational cost associated with fine scale high fidelity simulations of the used computational framework. In this work, a coarse graining scheme was developed based on energy dissipation conservation for coarse and fine model, under complex damage mechanisms (mainly shear and shear-tension). The proposed scheme was first calibrated and validated using plain concrete tests including uniaxial compression and notched three point bending simulations, then it was validated for large-scale reinforced concrete beams.
Description
August 2018
School of Engineering
School of Engineering
Department
Dept. of Civil and Environmental Engineering
Publisher
Rensselaer Polytechnic Institute, Troy, NY
Relationships
Rensselaer Theses and Dissertations Online Collection
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