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作者:

Cao, Wanlin (Cao, Wanlin.) (学者:曹万林) | Liu, Yibin (Liu, Yibin.) | Qiao, Qiyun (Qiao, Qiyun.) | Feng, Yu (Feng, Yu.) | Peng, Shiyang (Peng, Shiyang.)

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摘要:

Sixteen full-scale recycled aggregate concrete (RAC) beams were cast and tested to study their time-dependent behavior under long-term loading. The test parameters include the replacement rate of the recycled coarse aggregates (RCAs), the replacement rate of the recycled fine aggregates (RFAs), the concrete strength, and the stress ratio. The influence of the above variables on the deflection and stiffness is discussed. The results show that the RCAs will increase the deflection of the specimen at a low stress ratio; at a high stress ratio, the beams will experience nonlinear creep, and the deflection of the specimen will be affected by the RCAs and the stress ratio. The RFAs have a substantial influence on the time-dependent behavior of the specimen, and the deflection of the specimen with 100% replacement of recycled aggregates can increase by 30%; the strength of the concrete does not have a substantial influence on the time-dependent behavior of the specimen; and the stress ratio has an influence on the initial deflection of the specimen. A deflection calculation formula is established based on the stress-strain relationship of the beam under long-term loading and the characteristics of the RAC. The calculation results are in good agreement with the test results.

关键词:

full-scale beam recycled aggregate concrete time-dependent behavior long-term loading

作者机构:

  • [ 1 ] [Cao, Wanlin]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Liu, Yibin]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Qiao, Qiyun]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Feng, Yu]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Peng, Shiyang]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China

通讯作者信息:

  • [Liu, Yibin]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China

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来源 :

MATERIALS

年份: 2020

期: 21

卷: 13

3 . 4 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:169

被引次数:

WoS核心集被引频次: 4

SCOPUS被引频次: 6

ESI高被引论文在榜: 0 展开所有

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