| 基于统计损伤理论的锚杆受力全历程分析 |
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| 引用本文： | 王保田,周炳生,周天宝,王远航.基于统计损伤理论的锚杆受力全历程分析[J].河海大学学报(自然科学版),2018,46(4):314-321. |
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| 作者姓名： | 王保田 周炳生 周天宝 王远航 |
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| 作者单位： | 河海大学岩土力学与堤坝工程教育部重点实验室;江苏省岩土工程技术工程研究中心 |
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| 基金项目： | 中央高校基本科研业务费专项(2016B43014) |
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| 摘 要： | 基于统计损伤理论,假设锚杆剪切滑移界面各微元的剪切强度服从Weibull概率分布,建立了考虑残余强度的锚杆界面统计损伤本构模型,并选取微元建立锚杆锚固端的受力平衡,确立了锚杆各锚固深度下剪切滑移、轴力、侧阻力以及损伤的数值解法。基于室内拉拔试验确定本构方程,以工程实例进行了验证。同时对锚杆拉拔荷载传递的全历程进行探讨。结果表明:随着拉拔荷载的增加,锚杆顶部的侧阻力增长至峰值点后衰减,最终稳定至残余强度,剪应力分布单峰曲线进一步向锚固深度内传递,锚杆界面应力软化的本质是损伤积累并传递的过程。参数m能够反映剪切滑移曲线的峰后软化速率,减小m可以降低接触面软化和损伤积累传递的速率,从而降低锚杆整体刚度的退化速度,在一定荷载范围内减少锚杆滑移。
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| 关 键 词： | 统计损伤理论 锚杆 本构模型 全历程 应力软化 荷载传递 |
Analysis of the whole course for the force transferring mechanism in anchor bar based on statistical damage constitutive theory |
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| WANG Baotian,ZHOU Bingsheng,ZHOU Tianbao and WANG Yuanhang.Analysis of the whole course for the force transferring mechanism in anchor bar based on statistical damage constitutive theory[J].Journal of Hohai University (Natural Sciences ),2018,46(4):314-321. |
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| Authors: | WANG Baotian ZHOU Bingsheng ZHOU Tianbao and WANG Yuanhang |
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| Institution: | Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; Jiangsu Research Center for Geotechnical Engineering Technology, Hohai University, Nanjing 210098, China,Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; Jiangsu Research Center for Geotechnical Engineering Technology, Hohai University, Nanjing 210098, China,Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; Jiangsu Research Center for Geotechnical Engineering Technology, Hohai University, Nanjing 210098, China and Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; Jiangsu Research Center for Geotechnical Engineering Technology, Hohai University, Nanjing 210098, China |
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| Abstract: | |
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| Keywords: | statistical damage theory anchor bar constitutive model whole course stress softening load transfer |
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