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  A Plasticity Formulation for Modeling Concrete Confined with FRP  
Diupload oleh : Bambang Piscesa,ST., MT.
Pengarang : Piscesa B, Attard M. M.
Tahun : 2016
Dipublikasikan di : The 2nd International Conference on Mechanics Composites, Porto, Portugal, 11-14 July 2016
Jenis Jurnal : International Conference
Eksternal Link : http://https://www.researchgate.net/publication/305981990_A_Plasticity_Formulation_For_Modeling_Confined_Concrete_with_FRP
Bidang Penelitian : Concrete Constitutive Modeling
Abstrak : Most existing models for concrete behavior confined with FRP have been calibrated using active confinement data and overestimate the peak stress, especially when dealing with very high stiffness of FRP. In addition, the dilation characteristics are not predicted accurately. For decades, researchers have been trying to solve the modeling problems by adjusting either the failure surface (from active to passive), adjusting the dilation characteristics or using an effective confining pressure. Most of these models are usually only accurate for specific cases of confinement and experimental results. In this paper, a plasticity formulation is presented which is able to predict accurately for both active and passive confined concrete without adjusting either the failure surface or the confining pressure. The prediction of concrete dilation characteristics under passive confinement also verified with the experimental results. The proposed model uses an empirical failure surface which is based on active confinement data. To improve the prediction in the lateral direction, the proposed flow rule has a dilation rate control parameter, which is a function of the type of the confinement. This paper presents some comparisons with experimental results and existing models from the literature in order to validate the accuracy of the proposed model.
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