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作者:

Lei, Yushuang (Lei, Yushuang.) | Jin, Liu (Jin, Liu.) (学者:金浏) | Yu, Wenxuan (Yu, Wenxuan.) | Du, Xiuli (Du, Xiuli.)

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摘要:

A numerical model utilizing 3D mesoscale simulation methods was developed to investigate the influence of strain rate on the torsional performance of geometrically similar Basalt Fiber Reinforced Polymer bars-reinforced concrete (BFRP-RC) beams, as well as the corresponding size effects. The model incorporates concrete heterogeneity, material strain rate effects, and the dynamic bond-slip relationship between BFRP bars and concrete. The torsional performance of BFRP-RC beams with different structural sizes and stirrup ratios was analyzed under different strain rates. The study yielded the following findings: (1) The damage degree of BFRP-RC beams increases with the rising strain rate. (2) Increasing strain rate and stirrup ratio enhances the beams' torsional strength and ductility while attenuating the size effect, albeit not eliminating it. (3) The impact of increasing strain rate on beam strength, ductility, and size effect outweighs that of increasing stirrup ratio. Finally, based on the Ba & zcaron;ant size effect law (SEL) combined with the simulation results, a new size effect law was proposed that can quantitatively consider the effect of strain rate and stirrup ratio on the torsional strength of BFRP-RC beams.

关键词:

size effect stirrup ratio meso-scale simulation dynamic torsional loading BFRP-reinforced concrete beam

作者机构:

  • [ 1 ] [Lei, Yushuang]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Beijing, Peoples R China
  • [ 2 ] [Jin, Liu]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Beijing, Peoples R China
  • [ 3 ] [Yu, Wenxuan]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Beijing, Peoples R China
  • [ 4 ] [Du, Xiuli]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Beijing, Peoples R China
  • [ 5 ] [Jin, Liu]Beijing Univ Technol, Coll Architecture & Civil Engn, 100 Pingleyuan, Beijing 100124, Peoples R China

通讯作者信息:

  • [Jin, Liu]Beijing Univ Technol, Coll Architecture & Civil Engn, 100 Pingleyuan, Beijing 100124, Peoples R China;;

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来源 :

INTERNATIONAL JOURNAL OF DAMAGE MECHANICS

ISSN: 1056-7895

年份: 2024

期: 9

卷: 33

页码: 696-724

4 . 2 0 0

JCR@2022

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SCOPUS被引频次: 3

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