Study on Creep Model of Pre-stressed Concrete Based on Component Scale

Zhang Jiangtao; Du Yang; Cai Dahua; Tao Jun; Zhao Chuanli; Shi Wenxiang

doi:10.13832/j.jnpe.2022.S1.0027

Volume 43 Issue S1

Jul. 2022

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Zhang Jiangtao, Du Yang, Cai Dahua, Tao Jun, Zhao Chuanli, Shi Wenxiang. Study on Creep Model of Pre-stressed Concrete Based on Component Scale[J]. Nuclear Power Engineering, 2022, 43(S1): 27-34. doi: 10.13832/j.jnpe.2022.S1.0027

Citation:

Zhang Jiangtao, Du Yang, Cai Dahua, Tao Jun, Zhao Chuanli, Shi Wenxiang. Study on Creep Model of Pre-stressed Concrete Based on Component Scale[J]. Nuclear Power Engineering, 2022, 43(S1): 27-34. doi: 10.13832/j.jnpe.2022.S1.0027

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Study on Creep Model of Pre-stressed Concrete Based on Component Scale

doi: 10.13832/j.jnpe.2022.S1.0027

1.
CNNP Nuclear Power Operations Management Co., Ltd., Jiaxing, Zhejiang, 314300, China
2.
Central Research Institute of Building and Construction, Co., Ltd., Beijing, 100088, China

Received Date: 2022-01-18
Rev Recd Date: 2022-04-08
Publish Date: 2022-06-15

Abstract

Abstract

To assess long-term pre-stress loss of nuclear power plant containment, the creep prediction model of pre-stressed concrete is established by combining experimental investigation with theoretical analysis by taking pre-stressed concrete beam as the research object. Based on the existing creep test of pre-stressed concrete beams, the shrinkage test of pre-stressed concrete beams under the same environment is carried out with the same concrete materials to measure the actual shrinkage deformation of pre-stressed concrete beams. Considering the coupling effect of concrete shrinkage, creep and pre-stressed tendon relaxation, the age adjusted effective modulus method is introduced to establish the calculation method of concrete creep coefficient derived from the test data. Finally, the creep model of pre-stressed concrete is established and its long-term creep deformation is predicted, which provides a theoretical support for the long-term pre-stress loss assessment of nuclear power plant containment structure.
- Containment,
- Concrete,
- Pre-stress,
- Creep,
- Shrinkage

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References(10)

References

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