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A platform for research: civil engineering, architecture and urbanism
Damage constitutive model of concrete under repeated load after seawater freeze-thaw cycles
https://orcid.org/0000-0001-7646-5814
Highlights A damage constitutive model of concrete under seawater freeze-thaw cycles was presented. Damage of different numbers of seawater freeze-thaw cycles was described by uniform equations. Envelope curve expressions base on the Mander model were modified for unconfined concrete.
Abstract Offshore concrete structures in cold climates inevitably experience seawater freeze-thaw cycles, which increase surface scaling and internally damage the concrete, thereby altering the mechanical properties. The constitutive relation and compression damage to the concrete after seawater freeze-thaw cycles are absent from existing studies of structural nonlinearity. Repeated uniaxial compression tests on prism specimens were conducted to investigate the stress-strain and the damage variable of the concrete after 0, 25, 50, 75, 100, and 125 seawater freeze-thaw cycles. Using plastic damage theory and experimental results, we developed a constitutive model of concrete subjected to seawater freeze-thaw cycles, which was input to ABAQUS for numerical simulation. The results showed that the reloading stiffness degradation trend of compression was basically the same for different numbers of freeze-thaw cycles. Compression damage could be calculated by uniform equations after the peak point. The modeling results matched well with the experimental results, indicating that the constitutive model can provide a theoretical basis for nonlinear analysis or design of offshore bridges in cold climates.
Damage constitutive model of concrete under repeated load after seawater freeze-thaw cycles
https://orcid.org/0000-0001-7646-5814
Highlights A damage constitutive model of concrete under seawater freeze-thaw cycles was presented. Damage of different numbers of seawater freeze-thaw cycles was described by uniform equations. Envelope curve expressions base on the Mander model were modified for unconfined concrete.
Abstract Offshore concrete structures in cold climates inevitably experience seawater freeze-thaw cycles, which increase surface scaling and internally damage the concrete, thereby altering the mechanical properties. The constitutive relation and compression damage to the concrete after seawater freeze-thaw cycles are absent from existing studies of structural nonlinearity. Repeated uniaxial compression tests on prism specimens were conducted to investigate the stress-strain and the damage variable of the concrete after 0, 25, 50, 75, 100, and 125 seawater freeze-thaw cycles. Using plastic damage theory and experimental results, we developed a constitutive model of concrete subjected to seawater freeze-thaw cycles, which was input to ABAQUS for numerical simulation. The results showed that the reloading stiffness degradation trend of compression was basically the same for different numbers of freeze-thaw cycles. Compression damage could be calculated by uniform equations after the peak point. The modeling results matched well with the experimental results, indicating that the constitutive model can provide a theoretical basis for nonlinear analysis or design of offshore bridges in cold climates.
Damage constitutive model of concrete under repeated load after seawater freeze-thaw cycles
https://orcid.org/0000-0001-7646-5814
Highlights A damage constitutive model of concrete under seawater freeze-thaw cycles was presented. Damage of different numbers of seawater freeze-thaw cycles was described by uniform equations. Envelope curve expressions base on the Mander model were modified for unconfined concrete.
Abstract Offshore concrete structures in cold climates inevitably experience seawater freeze-thaw cycles, which increase surface scaling and internally damage the concrete, thereby altering the mechanical properties. The constitutive relation and compression damage to the concrete after seawater freeze-thaw cycles are absent from existing studies of structural nonlinearity. Repeated uniaxial compression tests on prism specimens were conducted to investigate the stress-strain and the damage variable of the concrete after 0, 25, 50, 75, 100, and 125 seawater freeze-thaw cycles. Using plastic damage theory and experimental results, we developed a constitutive model of concrete subjected to seawater freeze-thaw cycles, which was input to ABAQUS for numerical simulation. The results showed that the reloading stiffness degradation trend of compression was basically the same for different numbers of freeze-thaw cycles. Compression damage could be calculated by uniform equations after the peak point. The modeling results matched well with the experimental results, indicating that the constitutive model can provide a theoretical basis for nonlinear analysis or design of offshore bridges in cold climates.
Damage constitutive model of concrete under repeated load after seawater freeze-thaw cycles
Qiu, Wen-Liang (author) / Teng, Fei (author) / Pan, Sheng-Shan (author)
2019-11-08
Article (Journal)
Electronic Resource
English
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