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作者:

Jin, Liu (Jin, Liu.) | Zhang, Binlin (Zhang, Binlin.) | Chen, Fengjuan (Chen, Fengjuan.) | Miao, Liyue (Miao, Liyue.) | Du, Xiuli (Du, Xiuli.)

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摘要:

Most of the current methods for estimating the shear contribution of CFRP are based on laboratory testing of small-sized specimens. The applicability of the current codes on large-sized FRP-strengthened shear walls remains debatable. The present study addresses the problem by investigating the combined effects of structural sizes and CFRP ratios on the shear contribution of CFRP. Through experiments, a series of geometrically similar CFRP-strengthened RC shear walls were designed and subjected to a cyclic horizontal loading. From the experiments, the following results can be obtained. The application of the externally bonded CFRP strips alters the failure mode and enhances remarkably the seismic resistance by suppressing crack propagation and increasing the energy dissipation. The increasing specimen size reduces the enhancement effects of CFRP on the nominal shear strength, ductility, and energy dissipation. These findings indicate that without considering the size effect, the effective strain that reflects the shear contribution of CFRP strips are greatly overestimated by the current codes. Therefore, the present study proposed and validated an effective strain factor capturing the combined effects of the structural size and the CFRP ratio on the shear contribution of CFRP strips, serving in assessing the shear strengthening effect of CFRP on shear walls.

关键词:

Effective strain Shear contribution Experimental investigate Structural size CFRP-strengthened shear wall

作者机构:

  • [ 1 ] [Jin, Liu]Beijing Univ Technol, key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Zhang, Binlin]Beijing Univ Technol, key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Chen, Fengjuan]Beijing Univ Technol, key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Miao, Liyue]Beijing Univ Technol, key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Du, Xiuli]Beijing Univ Technol, key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China

通讯作者信息:

  • [Chen, Fengjuan]Beijing Univ Technol, key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China;;

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来源 :

ENGINEERING STRUCTURES

ISSN: 0141-0296

年份: 2024

卷: 307

5 . 5 0 0

JCR@2022

被引次数:

WoS核心集被引频次: 4

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