Research on Creep Characteristics of Concrete Under Biaxial Compressive Stresses

RONG Hua; FAN Xing-lang; GENG Yan; DONG Wei

doi:10.13204/j.gyjzG22062006

Volume 52 Issue 9

Sep. 2022

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RONG Hua, FAN Xing-lang, GENG Yan, DONG Wei. Research on Creep Characteristics of Concrete Under Biaxial Compressive Stresses[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(9): 224-228. doi: 10.13204/j.gyjzG22062006

Citation:

RONG Hua, FAN Xing-lang, GENG Yan, DONG Wei. Research on Creep Characteristics of Concrete Under Biaxial Compressive Stresses[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(9): 224-228. doi: 10.13204/j.gyjzG22062006

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Research on Creep Characteristics of Concrete Under Biaxial Compressive Stresses

doi: 10.13204/j.gyjzG22062006

1. Central Research Institute of Building and Construction Co., Ltd., MCC Group, Beijing 100088, China;
2. Inspection and Certification Co., Ltd., MCC, Beijing 100088, China;
3. Dalian University of Technology, Dalian 116024, China

Received Date: 2022-06-20
Available Online: 2023-02-06

Abstract

Abstract

The structures of nuclear containment vessel usually work under biaxial pre-compressive stresses. The existed uniaxial creep theory cannot be used to calculate the creep deformation of concrete under biaxial compressive stresses. Considering the effect of biaxial compressive stresses, the matrix of creep Poisson’s ratio was established by introducing the parameter of stress ratio. Meanwhile, based on the B4 creep model of uniaxial stress, the creep function under biaxial stresses was developed using Dirichlet series. Combining the Poisson effect with material viscoelastic property, the nonlinear creep model under biaxial compressive stresses was proposed. The proposed model was verified by taking the comparison between numerical and experimental results. Finally, the proposed model was also employed to numerically analyze the pre-stress loss for a containment vessel. It is expected that the proposed model could be useful for the containment vessel structures on assessment of time-dependent prestress loss and prediction of further working life.
- nuclear containment of power plant,
- prestress losing,
- creep deformation,
- nonlinearity,
- biaxial compression

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References(13)

References

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