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<p>To address the lack of available load–deformation prediction models and optimization designs for fully bonded tension‒compression composite anchorage systems (FBTC–anchorage systems) at earthen heritage sites, this study introduces a bilinear bond–slip model to describe the mechanical behavior at the bolt–grout interface (B–G interface) and employs an ideal elastic‒plastic model to characterize the constitutive relationship between the pressure‒bearing body (PBB) and the grout based on the stress mechanism of the FBTC–anchorage system, establishing a new theoretical model that can predict key indicators at each stage until the FBTC–anchorage system reaches its ultimate bearing capacity. The accuracy of the model was validated by identifying characteristic points on the experimental curve and inverting structural parameters. This research indicates that optimizing structural parameters can improve the bearing‒deformation performance of the FBTC–anchorage system and that intervention–induced resistance (IIR) can quantitatively evaluate its optimized design.</p>

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Study on the bearing‒deformation characteristics and design optimization of tension‒compression composite anchors at earthen heritage sites

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月7日

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  • Donghua Wang,
  • Kenan Cui,
  • Yingwen Xing,
  • Xiaohu Shen,
  • Yao Wang,
  • Kai Cui

摘要

To address the lack of available load–deformation prediction models and optimization designs for fully bonded tension‒compression composite anchorage systems (FBTC–anchorage systems) at earthen heritage sites, this study introduces a bilinear bond–slip model to describe the mechanical behavior at the bolt–grout interface (B–G interface) and employs an ideal elastic‒plastic model to characterize the constitutive relationship between the pressure‒bearing body (PBB) and the grout based on the stress mechanism of the FBTC–anchorage system, establishing a new theoretical model that can predict key indicators at each stage until the FBTC–anchorage system reaches its ultimate bearing capacity. The accuracy of the model was validated by identifying characteristic points on the experimental curve and inverting structural parameters. This research indicates that optimizing structural parameters can improve the bearing‒deformation performance of the FBTC–anchorage system and that intervention–induced resistance (IIR) can quantitatively evaluate its optimized design.