Basic research on the shear band formation by pulling out of anchor

锚杆拉出剪切带形成的基础研究

• 批准号: 15560421
• 负责人: IKEDA Kiyohiro
• 金额: $ 2.37万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560421/
• 关键词: Tower for electrical line; Pulling out test; Sloped ground; Elasto-plastic deformation analysis; Shear band formation

This research has been conducted for the following three purposes :1.The search for the mechanism of shear band formation by the pulling out of the anchor.2.The development of three-dimensional large deformation elasto-plastic FEM analysis program.3.The search for the interaction of the shape of foundation and the failure mechanism.The pulling out analysis of the anchor by the wind load has been conducted for the ground slopes of 0, 25, and 35 degrees to obtain the curves of load and deflection and the form of shear bands on the surface. The tilted ground exhibited higher pulling out resistance by virtue of the use of the post connection.A three-dimensional large deformation elasto-plastic FEM analysis program has been developed with the use of associated and non-associated flow rules. The latter rule displayed much better correlation with the experimental results.Three-dimensional analyses are conducted on the flat and tilted grounds, and compared with the associated experiments. As a result of this, the computed located zones turned out to be consistent with the experimental observation, and the variation of the pulling out strength of the anchor in association with the change of the angle of the slope. In addition, the rotation of the anchor has been observed.Last the simulation of on-site pulling out test was conducted to simulate force vs displacement curves and slide lines on the ground surface.It will be a topic in the future to arrive at more realistic pulling out behaviors through the followings : 1.The improvement of the. analysis program by the implementation of the progressive failure. 2.The evaluation of the heterogeneity of soils.

本文的研究工作主要有三个方面：1.探讨锚杆拔出时剪切带的形成机理; 2.开发三维大变形弹塑性有限元分析程序; 3.探讨基础形状与破坏机理的相互作用。对0 °、25 °、35 °三种不同坡度的边坡进行了风荷载作用下锚的拔出分析，得到了荷载-挠度曲线和表面剪切带的形态。采用关联流动法则和非关联流动法则，编制了三维大变形弹塑性有限元分析程序。后一个规则显示出更好的相关性与实验结果。三维分析进行了在平坦和倾斜的地面，并与相关的实验进行了比较。结果表明，计算出的锚固区与试验观测值吻合较好，且锚抗拔力随坡角的变化规律一致。最后，进行了现场拉拔试验的模拟，模拟了锚的力-位移曲线和地表滑移线，通过以下几个方面来获得更真实的拉拔行为是今后的研究课题：1.改进锚杆的抗拔性能;分析程序执行时的渐进失效。2.土壤异质性的评价。

项目成果

逆T型基礎引揚時の地盤の終局特性の評価

吊装倒T形基础时地面最终特性评估

• 发表时间: 2005
• 期刊: 平成16年度 土木学会東北支部技術研究発表会
• 作者: 杉山圭大;石川達也;三浦清一;関根悦夫;森田耕平
• 通讯作者: 森田耕平

Three-dimensional simulation of the development of localization of a reversed-T-shaped anchor.

倒T形锚固定位发展的三维模拟。

• 发表时间: 2004
• 期刊: Conference of technology and research Tohoku branch, JSCE
• 作者: 森尾 敏;藤井 豊;満藤 弘;桑本寛之;HIROYUKI KUWAMOTO
• 通讯作者: HIROYUKI KUWAMOTO

逆T型基礎引揚時の局所化伝播の三次元シミュレーション

倒T形基础回缩过程中局部传播的三维模拟

• 发表时间: 2004
• 期刊: 平成15年度 土木学会東北支部技術研究発表会
• 作者: 森尾 敏;藤井 豊;満藤 弘;桑本寛之
• 通讯作者: 桑本寛之

池田清宏, 桑本寛之, 山川優樹, 本村禎浩, 松木裕哲: "逆T型基礎引揚時の変位応答の三次元シミュレーション"第39回 地盤工学研究発表会. (2004)

Kiyohiro Ikeda，Hiroyuki Kuwamoto，Yuki Yamakawa，Yoshihiro Motomura，Yutetsu Matsuki：“倒T型基础收缩过程中位移响应的三维模拟”第39届岩土工程研究会议（2004年）。

逆T型基礎引揚時の変位応答の三次元シミュレーション

倒T型基础吊装位移响应三维模拟

• 发表时间: 2004
• 期刊: 第39回 地盤工学研究発表会
• 作者: Gorgulu;U.;Chouw;N.;石川達也;池田清宏
• 通讯作者: 池田清宏