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.

本研究的目的有以下三个：1.探索锚杆拉出剪切带形成的机理。2.三维大变形弹塑性有限元分析程序的开发。3.对0、25、35°地面坡度进行了风荷载作用下锚杆的拔脱分析，得到了荷载与挠度曲线以及剪切带的形式表面上。由于使用柱连接，倾斜的地面表现出更高的拔出阻力。利用关联和非关联流动规则开发了三维大变形弹塑性有限元分析程序。后一种规则与实验结果显示出更好的相关性。在平坦和倾斜的地面上进行了三维分析，并与相关实验进行了比较。结果，计算出的定位区域与实验观察一致，并且锚杆的拉拔强度随斜坡角度的变化而变化。另外还观察了锚杆的旋转情况。最后进行了现场拉拔试验的模拟，模拟了地表的力-位移曲线和滑线。更多的了解将是未来的课题。通过以下方式实现现实的拔出行为： 1. 的改进。分析程序所执行的渐进性故障。 2.土壤异质性评价。

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）。

Three-dimensional simulation of the deformation response of a reversed-T-shaped anchor.

倒T形锚杆变形响应的三维模拟。

• 发表时间: 2004
• 期刊: Conference on foundation engineering Vol.39
• 作者: Morio;S.;Kato;Y.;KIYOHIRO IKEDA
• 通讯作者: KIYOHIRO IKEDA