A Performance Estimation Method for Exsiting Concrete Components Based on Measured Prestress Values

XU Qing; LI Jiawei; ZENG Bin; XU Xiaoda; ZHANG Haoda

doi:10.3724/j.gyjzG23051901

Volume 54 Issue 8

Aug. 2024

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2024 > 54(8): 1-8

XU Qing, LI Jiawei, ZENG Bin, XU Xiaoda, ZHANG Haoda. A Performance Estimation Method for Exsiting Concrete Components Based on Measured Prestress Values[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(8): 1-8. doi: 10.3724/j.gyjzG23051901

Citation:

XU Qing, LI Jiawei, ZENG Bin, XU Xiaoda, ZHANG Haoda. A Performance Estimation Method for Exsiting Concrete Components Based on Measured Prestress Values[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(8): 1-8. doi: 10.3724/j.gyjzG23051901

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A Performance Estimation Method for Exsiting Concrete Components Based on Measured Prestress Values

doi: 10.3724/j.gyjzG23051901

1. Central Research Institute of Building & Construction Co., Ltd., MCC Group, Beijing 100088, China;
2. Department of Civil Engineering, Tsinghua University, Beijing 100084, China

Received Date: 2023-05-19
Available Online: 2024-09-19

Abstract

Abstract

In order to put forward a performance evaluation method for existing prestressed concrete members considering the distribution of effective prestress, reveal the mapping relationship between the sampling test values of effective prestress and the characteristic parameters of the performance analysis of prestressed concrete structures, and verify the overall distribution law of effective prestress of prestressed concrete structures based on Gaussian mixture unified probability model, based on the sample data of the measured effective prestress values, the typical characteristics of the effective prestress distribution are extracted by the probabilistic and statistical methods such as feature weighting method and maximum expectation algorithm (EM) based on the unified probability model, and the characteristic value of the bearing capacity under the condition of 95% guarantee rate was introduced for quantitative calculation of the service performance of the structure. A method for predicting the performance of existing prestressed concrete members based on measured sample data was proposed. Taking an unbonded prestressed concrete structure as an engineering example, design review method and eigenvalue method were used to evaluate the service performance of the structure respectively. The results showed that compared with the existing evaluation methods, the eigenvalue method could better fit the actual situation and effectively ensure the safety and reliability of the structure, so as to provide a reference for the performance evaluation and reinforcement design of the existing prestressed concrete structures.
- prestressed concrete structure,
- effective prestress,
- unified probability model,
- measured sample data,
- evaluation of characteristic values

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References(21)

References

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