Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/88505
Título: | Analytical model to predict axial stress-strain behavior of heat-damaged unreinforced concrete columns wrapped by FRP jacket |
Autor(es): | Shayanfar, Javad Barros, Joaquim A. O. Rezazadeh, Mohammadali |
Palavras-chave: | FRP confinement Heat-damaged concrete Axial behavior Stress-strain model RC columns Steel confinement Dilation model |
Data: | 2023 |
Editora: | Elsevier 1 |
Revista: | Engineering Structures |
Citação: | Shayanfar, J., Barros, J. A. O., & Rezazadeh, M. (2023, August). Analytical model to predict axial stress-strain behavior of heat-damaged unreinforced concrete columns wrapped by FRP jacket. Engineering Structures. Elsevier BV. http://doi.org/10.1016/j.engstruct.2023.116244 |
Resumo(s): | Although there are several confinement models to obtain analytically the axial stress-strain response (fc − εc) of concrete columns wrapped with fiber-reinforced-polymer (FRP) jacket at ambient conditions, a reliable designoriented model to determine the fc − εc of heat-damaged concrete columns post-confined with FRP is still lacking in the literature. This study aims to address this research gap, by proposing a formulation that predicts the favourable effects of FRP confinement on concrete elements previously exposed to high temperatures. This model proposes a closed-form formulation to derive a fc − εc expression, including a set of strength and strain submodels to calculate the stress/strain information at transition and ultimate points defining the stress-strain response. To develop the model and calibrate its key components by data analysis of statistical treatment techniques, a large test database of FRP confined unheated/heat-damaged concrete of circular/square crosssection consisting of 1914 specimens was collected. The proposed design-oriented model is able to demonstrate the influence of pre-existing thermal damage on the axial fc − εc relationship, whose reliability is revealed comprehensively through predicting data from several experimental heat-damaged concrete specimens confined with FRP systems. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/88505 |
DOI: | 10.1016/j.engstruct.2023.116244 |
ISSN: | 0141-0296 |
e-ISSN: | 1873-7323 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S0141029623006594 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | ISISE - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Analytical model to predict axial stress-strain behavior of heat-damaged unreinforced concrete columns wrapped by FRP jacket.pdf | 2,31 MB | Adobe PDF | Ver/Abrir |