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Full-scale pullout tests of rock anchors in a limestone quarry focusing on bond failure at the anchor-grout and grout-rock interfaces

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第9期15卷 2264-2279页

作者： Bjarte Grindheim Charlie cli Are Håvard Høien Department of Geoscience and Petroleum Norwegian University of Science and Technology(NTNU)TrondheimNorway Norwegian Public Roads Administration(NPRA) BergenNorway

Rock anchors are a common safety measure for stabilising large-scale infrastructure,such as bridge towers,retaining walls,rock slopes and *** are four principal failure modes for rock anchors:(a)tensile failure of the steel anchor,(b)anchor-grout interface failure,(c)grout-rock interface failure,and(d)rock mass *** tests were performed in a limestone *** tests were designed to test failure modes B and C through *** the tests of failure mode B,the shear stress on the anchor-grout interface is the largest at the top of the grout column and attenuates towards the distal end for small *** shear stress becomes uniformly distributed when the applied load is approximately 50%of the ultimate pullout *** anchors designed to test failure mode C were installed with an endplate and had a higher toughness than the straight bar *** shear stress on the grout-rock interface is the largest at the endplate and attenuates upward before slip starts along the *** the ultimate pullout load is reached,and the grout column starts to slip,the shear stress is approximately *** bond shear strength on the anchor-grout interface was approximately 20%of the uniaxial compressive strength of the grout,and the bond strength of the grout-rock interface was around 5%for that of the *** grout-rock interface is likely determined by whichever is weaker,the grout or the rock.

关键词： Rock anchor Load transfer Shear stress distribution Bond shear strength Field test

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Bioinspired Ultra-Low Adhesive Energy Interface for Continuous 3D Printing: Reducing Curing Induced Adhesion

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Research 2018年第1期2018卷 194-200页

作者： L.Wu ZDong H.Du cli N.X.Fang Y.Song Key Laboratory of Green Printing Institute of ChemistryChinese Academy of SciencesZhongguancun North First Street 2100190 BeijingChina CAS Key Laboratory of Bio-inspired Materials and Interfacial Sciences Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA

Additive manufacturing based on liquid resin curing is one of the most promising methods to construct delicate ***,precision and speed are limited by the vertical adhesion of in situ cured resin at the curing *** overcome the unavoidable adhesion and to develop a general curing interface,we propose a slippery surface taking inspiration of the peristome surface of the pitcher *** surface shows ultra-low adhesive energy at the curing interface due to the inhibition of the direct contact between the cured resin and the solid surface,which also increases the reflling speed of liquid *** ultra-low adhesive energy interface is efective for continuous 3D printing and provides insights into the physical mechanisms in reducing vertical solid-solid interfacial adhesion.

关键词： curing resin interface

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探索Midi的奥妙

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个人电脑 2005年第1期11卷 88-90页

作者： cli

尽管Midi诞生的年代久远,但其仍然是音乐制作中最为重要的事实上这个编辑窗口的功能远不止如此。在窗口的左侧有一个使用标准之一。今天我们要讨论的话题就是如何最大限度发挥Midi菜单栏,点击它后会出现一个弹出菜单,菜单中罗列了所有... 详细信息

尽管Midi诞生的年代久远,但其仍然是音乐制作中最为重要的事实上这个编辑窗口的功能远不止如此。在窗口的左侧有一个使用标准之一。今天我们要讨论的话题就是如何最大限度发挥Midi菜单栏,点击它后会出现一个弹出菜单,菜单中罗列了所有可被编的功效,用通用的工具构建现代Midi音?（共3页)

关键词：音乐制作软件网格编辑器 Midi 工具软件电脑

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数码互动异想天开

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个人电脑 2004年第10期 297-299页

作者： cli

十.一黄金周期间,很多读者利用假期游山玩水,放松身心,或游历祖国大好河山或览胜欧洲、澳洲,不亦乐乎!大家一定拍摄了不少照片,如何获得妙趣横生的片子,除了拍摄技巧等因素以外,后期处理也是个重要环节。本期的数码互动栏目中就为读者... 详细信息

十.一黄金周期间,很多读者利用假期游山玩水,放松身心,或游历祖国大好河山或览胜欧洲、澳洲,不亦乐乎!大家一定拍摄了不少照片,如何获得妙趣横生的片子,除了拍摄技巧等因素以外,后期处理也是个重要环节。本期的数码互动栏目中就为读者详细介绍如何利用Photoshop对数码照片进行后期处理以获得意想不到的多次曝光效果的方法。