采矿与安全工程学报2017，Vol.34Issue(6)：1094-1102,9.DOI:10.13545/j.cnki.jmse.2017.06.009
含软弱夹层锚固体变形过程中锚杆受力分析
Analysis on bolt performance during deformation process of anchorage containing a weak interlayer
摘要
Abstract
In order to understand the mechanical characteristics of the bolt during the deformation process of the anchorage containing a weak interlayer, the physical model tests are carried out, and the evolution of the bolt stress and their distribution law along the bolt are studied. The research results show that the bolt mechanical characteristics are closely related to the deformation phase of the anchor-age. With the anchorage deformation, the bolt gradually suffers tensile, compressive, bending and shear stress at the same time. At the pre-yielding phase of the anchorage, the change of bolt stresses is slow, and the stresses distribution along the bolt is relatively uniform (except the bending moment). However, at the post-yielding phase, the bolt stresses vary drastically and there are several distribution types of the stresses. As the anchorage enters the strain-softening stage, the bolt stresses begin to stabilize. When the bolt elongation is different from the transverse displacement of the anchorage, it suffers the axial force, while the uneven axial displacement of the anchorage makes the bolt suffering transverse shear stress and bending moment. The influence of the weak interlayer on the bolt mechanical characteristics emerges at the post-yielding stage of the anchorage. After the yielding point of the anchorage, kick-off points can be seen for the distribution curve of axial force in the weak interlayer. At the strain-softening stage of the anchorage, there is a flat segment on the evolution curves of the axial force of the bolt sec-tion embedded in the weak interlayer.关键词
锚杆/受力特征/软弱夹层/变形过程/锚固体Key words
bolt/stress characteristic/weak interlayer/deformation process/anchorage分类
建筑与水利引用本文复制引用
丁书学,靖洪文,齐燕军,许国安,张力,杨利军,龙景奎..含软弱夹层锚固体变形过程中锚杆受力分析[J].采矿与安全工程学报,2017,34(6):1094-1102,9.基金项目
国家重点基础研究发展计划(973)项目(2013CB036003) （973）
国家重点研发计划项目(2017YFC0603001) （2017YFC0603001）
国家自然科学基金项目(51374198,51374199) （51374198,51374199）
国家自然科学青年基金项目(51504247) （51504247）
