Name: installation method to enhance quality control for fiber reinforced polymer spike anchors
Uploaded: 2018-04-10T13:00:00
Description: Watch this Scientific Journal Video about Installation Method to Enhance Quality Control for Fiber Reinforced Polymer Spike Anchors at JoVE.com

作者希望对西卡的支持表示感谢, 特别是他们为锚杆和增援部队提供的材料。Betazul 是特别承认他们的帮助与定制钻头和视频的准备。

1. 锚杆安装方法
注: 该方法包括孔边钻孔、清洗和平滑, 以及锚杆的浸渍和插入。
<ol><li>钻孔到所需的嵌入长度和指定直径。
	<ol>
<li>使用合适的钻孔工具 (也就是说, 电锤或金刚石芯)。对于混凝土结构, 钻削工具的选择标准与胶粘剂锚点相同, 可以在以前发布的工作10、11中找到。对于电锤, 最大速度为 800 rpm 的钻头。<o...

<ol>
	<li>Grelle, S., Sneed, L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=An+evaluation+of+anchorage+systems+for+fiber-reinforced+polymer+(FRP)+laminates+bonded+to+reinforced+concrete+elements.">An evaluation of anchorage systems for fiber-reinforced polymer (FRP) laminates bonded to reinforced concrete elements.</a> Struct Cong. , 1157-1168 (2011).</li><li>Kalfat, R., Al-Mahaidi, R., Smith, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Anchorage+devices+used+to+improve+the+performance+of+reinforced+concrete+beams+retrofitted+with+FRP+composites:+State-of-the-art+review.">Anchorage devices used to improve the performance of reinforced concrete beams retrofitted with FRP composites: State-of-the-art review.</a> J Compos Constr. , 14-33 (2013).</li><li>Orton, S. L., Jirsa, J. O., Bayrak, O. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Design+considerations+of+carbon+fibre+anchors.">Design considerations of carbon fibre anchors.</a> J Compos Constr. 12 (6), 608-616 (2008).</li><li>Ozbakkaloglu, T., Saatcioglu, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Tensile+behavior+of+FRP+anchors+in+concrete.">Tensile behavior of FRP anchors in concrete.</a> J Compos Constr. 13 (2), 82-92 (2009).</li><li>Zhang, H. W., Smith, S. T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Influence+of+FRP+anchor+fan+configuration+and+dowel+angle+on+anchoring+FRP+plates.">Influence of FRP anchor fan configuration and dowel angle on anchoring FRP plates.</a> Compos Part B: Eng. 43 (8), 3516-3527 (2012).</li><li>Koutas, L., Triantafillou, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Use+of+anchors+in+shear+strengthening+of+reinforced+concrete+T-beams+with+FRP.">Use of anchors in shear strengthening of reinforced concrete T-beams with FRP.</a> J Compos Constr. 17 (1), 101-107 (2012).</li><li>Villanueva-Llaurad&#243;, P., Fern&#225;ndez-G&#243;mez, J., Gonz&#225;lez-Ramos, F. 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Part 5: Bonded Anchors. , (2013).</li><li>. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures. , (2008).</li><li>. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Design Guidance for Strengthening Concrete Structures Using Fibre Reinforced Composite Materials. , (2012).</li><li>Villanueva-Llaurad&#243;, P., Ibell, T., Fern&#225;ndez-G&#243;mez, J., Gonz&#225;lez-Ramos, F. 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C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Factors+influencing+bond+strength+of+adhesive+anchors.">Factors influencing bond strength of adhesive anchors.</a> ACI Struct J. 98 (1), 76-86 (2001).</li><li>. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Standard test method for Tensile Properties of Polymer Matrix Composite Materials. , (2014).</li><li>Chen, J., Teng, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Anchorage+strength+models+for+FRP+and+steel+plates+bonded+to+concrete.">Anchorage strength models for FRP and steel plates bonded to concrete.</a> J Struct Eng. 127 (7), 784-791 (2001).</li><li>Lu, X. Z., Teng, J. G., Ye, L. P., Jiang, J. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Bond-slip+models+for+FRP+and+steel+plates+bonded+to+concrete.">Bond-slip models for FRP and steel plates bonded to concrete.</a> Eng Struct. 27 (6), 920-927 (2005).</li><li>Brena, S. F., McGuirk, G. N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Advances+on+the+behavior+characterization+of+FRPanchored+carbon+fiber-reinforced+polymer+(CFRP)+sheets+used+to+strengthen+concrete+elements.">Advances on the behavior characterization of FRPanchored carbon fiber-reinforced polymer (CFRP) sheets used to strengthen concrete elements.</a> Int J Concr Struct Mater. 7 (1), 3-16 (2013).</li><li>Eshwar, N., Nanni, A., Ibell, T. 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T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=FRP-to-concrete+joint+assemblages+anchored+with+multiple+FRP+anchors.">FRP-to-concrete joint assemblages anchored with multiple FRP anchors.</a> Compos Struct. 94 (2), 403-414 (2012).</li></ol>

提出了一种用于 FRP 钉锚杆安装与设计的分步协议。据作者所知, 在安装参数和工艺对锚固能力的影响方面, 没有制定关于钉锚的详细协议。
所提出的平滑钻头对钉锚杆的性能有很有利的作用, 通过降低应力集中度, 证明了其在减小孤立锚杆试验散射方面的有效性。这与安装质量控制的提高有关。此外, 在建议的安装协议之后执行的锚点的低分散允许降低标准偏差, 从而有助于可...

FRP 锚提供了一种有希望的方式来增强外部粘合 FRPs 应用于现有结构的性能, 因为它们可以延迟甚至防止剥离失败1,2。然而, 对于设计者来说, 一个主要的问题是由于弯曲区域的应力集中导致了在剪切中锚杆的过早失效。安装质量和间隙孔的准备对于限制这种过早失效的应力集中至关重要。
本文论述了一种安装方法, 旨在减少应力集中的影响, 为钻孔的制备和锚杆的安装提供适当的质量控制。该方法涉及四部分: 钻孔和清洗孔, 平滑的孔边缘与定制钻头, 以避免不规则的应力分布在弯曲区域内, 安装锚本身, 包括浸渍锚栓和它的插入, 并且锚的黏附力到加强。
从以前发布的研究3,4,5,6,7, 它可以得出结论, 钉锚与弯曲的区域 (也就是说, 在自由端之间的某一角度和嵌入区域), 受应力集中, 容易引发过早失败。由于原始成员的几何形状, 因此不能始终避免这种情况。在许多情况下, 90°的销角是广泛使用的, 虽然它普遍认为, 135°的桩角允许减少应力集中, 并导致更好的性能的钉锚。使用90°定位角的主要原因是, 它们在任何方向上的执行和控制都更简单, 并降低了满足内部增援的可能性。
图 1显示了一个典型的钉锚, 其中最常见的定位角。与90°定位角安装的钉锚, 不过, 可以显示一个相对良好的性能, 如果适当控制的应力集中。极限应力集中通常涉及设计具有较大内弯曲半径的锚杆, 因为内部弯曲半径已被发现在光纤扭结8,9中发挥主要作用。在这个意义上, 作者如奥登等人3建议使用锚直径四倍的弯曲半径。这项建议导致不实际的弯曲半径, 即使对小的锚直径, 因为增加弯曲半径涉及减少实际嵌入长度的给定孔深度。
作者认为, 大弯曲半径的建议与控制实际内弯曲半径的难度有关, 从几何角度看, 当用手进行平滑处理时。因此设计了自定义钻头, 使安装易于质量控制, 并确保在设计中考虑弯曲半径。
本文考虑了两个不同的过程。第一个是与连接器 (锚, 特别是在扇出自由端之前) 的安装程序有关, 而第二个则包括建议的钉锚设计方法和验证需求。

<table border="0" cellpadding="0" cellspacing="0" style="width:957px;" width="957">
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		<col />
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	<tbody>
		<tr height="42">
			<td height="42" style="height:42px;width:216px;">Concrete</td>
			<td style="width:96px;"></td>
			<td style="width:119px;"></td>
			<td style="width:527px;">The concrete for support has a dosage made by the authors, and a strength class no lower than C40</td>
		</tr>
		<tr height="84">
			<td height="84" style="height:84px;width:216px;">SikaWrap anchor C</td>
			<td style="width:96px;">SIKA</td>
			<td style="width:119px;"></td>
			<td style="width:527px;">This material has been used for the FRP spike anchors. SikaWrap Anchor C is a unidirectional, carbon fiber rope, sheathed in an elastic gauze. The gauze can be cut onsite to create a fan end that anchors CFRP fabrics and plates used in the structural strengthening of masonry and concrete.&#160;</td>
		</tr>
		<tr height="41">
			<td height="41" style="height:41px;width:216px;">Sikadur 330</td>
			<td style="width:96px;">SIKA</td>
			<td style="width:119px;"></td>
			<td style="width:527px;">Impregnating resin, apt for manual saturation methods. The product was used for impregnating the anchor dowel before insertion</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:216px;">Sikadur 30</td>
			<td style="width:96px;">SIKA</td>
			<td style="width:119px;"></td>
			<td style="width:527px;">Thixotropic, two part epoxy resin applied by spatula and therefore suitable for virtually any application, including overhead</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:216px;">Drill bit</td>
			<td style="width:96px;">Betazul</td>
			<td style="width:119px;"></td>
			<td style="width:527px;">Drill bit employed to smooth the holes that was designed by the authors and developed by Betazul SA</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:216px;">Hammer drill</td>
			<td style="width:96px;">Hilti</td>
			<td style="width:119px;"></td>
			<td style="width:527px;">Tool for the execution of anchor holes on masonry and concrete, for different drilling ranges</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:216px;">Wire brush</td>
			<td style="width:96px;">Hilti</td>
			<td style="width:119px;">Hit series</td>
			<td style="width:527px;">For the proper brushing of drilled holes of varying diameters and embedment depths</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Blow-out pump</td>
			<td style="width:96px;">Hilti</td>
			<td style="width:119px;">Hit series</td>
			<td>Manual blow-out pump&#160;</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">SikaWrap-230 C</td>
			<td style="width:96px;">SIKA</td>
			<td style="width:119px;"></td>
			<td style="width:527px;">Unidirectional woven carbon fiber fabric for dry application process</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:216px;">Aluminium Bubble Roller</td>
			<td style="width:96px;">Fibre glast</td>
			<td style="width:119px;"></td>
			<td style="width:527px;">For laminations where increased pressure is necessary to release air bubbles. They are straight across the width of the head and provide excellent air relief for nearly all applications.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Brush</td>
			<td style="width:96px;"></td>
			<td style="width:119px;"></td>
			<td>For impregnation of FRP bundle and sheet</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:216px;">600 kN testing machine</td>
			<td style="width:96px;">Proeti</td>
			<td style="width:119px;">DI-CP/S</td>
			<td style="width:527px;">This is used for the shear test of anchors, in order to evaluate the efficacy of the proposed insertion method</td>
		</tr>
		<tr height="41">
			<td height="41" style="height:41px;width:216px;">Cable ties</td>
			<td style="width:96px;"></td>
			<td style="width:119px;"></td>
			<td style="width:527px;">Cable ties are needed to fasten the end of the anchor dowel in order to prevent fanning out of the fibers during insertion</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:216px;">Measuring tape</td>
			<td style="width:96px;"></td>
			<td style="width:119px;"></td>
			<td style="width:527px;">The measuring tape is necessary to control the embedment length as well as the diameter of the drill bit and hole clearance</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Steel wire</td>
			<td style="width:96px;"></td>
			<td style="width:119px;"></td>
			<td>Required to assist insertion</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:216px;">Rigid (steel) bar</td>
			<td style="width:96px;"></td>
			<td style="width:119px;"></td>
			<td style="width:527px;">A rigid bar of any material (in this case, it was made with a steel bar) is needed to control the embedment length</td>
		</tr>
	</tbody>
</table>

installation method to enhance quality control for fiber reinforced polymer spike anchors

纤维增强聚合物 (FRP) 锚杆是提高外部粘结 FRPs 在现有结构中的性能的一种有希望的方法, 因为它们可以延缓甚至防止脱粘失效。然而, 设计者所面临的一个主要问题是由于应力集中导致锚杆过早失效。安装质量差和间隙孔的准备会导致应力集中, 从而引发过早的故障。本文论述了一种安装方法, 旨在减少应力集中的影响, 为钻孔的制备提供适当的质量控制。该方法涉及三部分: 钻孔和清洗的孔, 平滑的孔边缘与定制钻头, 并安装锚本身, 包括浸渍的锚钉和其插入。锚杆风扇 (峰值的自由长度) 然后粘结到外部 FRP 加固。对于末端锚固, 并且在多层层增援的情况下, 建议将锚杆风扇插入两层之间以协助应力传递机制。
根据广泛的数据库, 所提出的程序辅以一种用于钉锚的设计方法。提出了设计中应遵循的几个步骤, 即: 选择锚径和后续抗拉强度的连接器 (即在扇出自由端前的锚杆), 评价降低抗拉强度的原因弯曲, 提供足够的嵌入, 以防止滑移失败, 并考虑到锚的数量和间距的一个给定的加固。在这个意义上, 应该指出, 需要进一步的研究, 以获得一个普遍的表达, 为钉锚的贡献, 整体粘结强度的 FRP 加固。

对孤立连接器进行了测试, 以评估平滑方法的有效性。此外, 还比较了两种浸渍和插入连接器的方法。湿法涉及在插入前立即浸渍锚栓, 如提交的协议。硬化 (或预浸渍) 方法包括预先浸渍的锚的嵌入区域, 至少24小时前插入。
在所提出的方法下进行的试验中, 与相同埋入长度和孔径的非光滑试样相比, 平均增加了27兆帕。值得注意...

Watch this Scientific Journal Video about Installation Method to Enhance Quality Control for Fiber Reinforced Polymer Spike Anchors at JoVE.com

Installation Method to Enhance Quality Control for Fiber Reinforced Polymer Spike Anchors

本文介绍了一种控制钢钉锚杆安装质量的方法, 旨在延缓外部粘结纤维增强聚合物的脱层。该协议包括钻孔的准备和插入过程。讨论了影响锚杆效率的最重要参数。

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The durability of polymers and fiber-reinforced polymer composites under service condition is a critical aspect to be addressed for their robust designs ...

Morphology Control for Fully Printable Organic&#8211;Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

Morphology Control for Fully Printable OrganicÃƒÆ’Ã‚Â¢ÃƒÂ¢Ã¢â‚¬Å¡Ã‚Â¬ÃƒÂ¢Ã¢â€šÂ¬Ã…â€œInorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

基于一个钛醇盐和半导体聚合物为全可印刷有机 - 无机批量异质结太阳能电池形貌控制

The photoactive layer of a typical organic thin-film bulk-heterojunction (BHJ) solar cell commonly uses fullerene derivatives as the electron-accepting ...

Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications

用于光学谐振器和激光应用的聚合物微球的制造

This paper describes three methods of preparing fluorescent microspheres comprising &#960;-conjugated or non-conjugated polymers: vapor diffusion, ...

Study of Siphon Breaker Experiment and Simulation for a Research Reactor

研究堆虹吸断路器试验与仿真研究

Under the design conditions of a research reactor, the siphon phenomenon induced by pipe rupture can cause continuous outward flow of water. To prevent ...

Experimental Protocol to Determine the Chloride Threshold Value for Corrosion in Samples Taken from Reinforced Concrete Structures

测定钢筋混凝土结构试样腐蚀的氯化物阈值的试验规程

The aging of reinforced concrete infrastructure in developed countries imposes an urgent need for methods to reliably assess the condition of these ...

Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior

定向钢纤维增强水泥基复合材料的制备及其弯曲性能研究

The aim of this work is to present an approach, inspired by the way in which a compass needle maintains a consistent orientation under the action of the ...

Advanced Self-Healing Asphalt Reinforced by Graphene Structures: An Atomistic Insight

石墨烯结构增强的先进自愈合沥青：原子学见解

Graphene can improve the self-healing properties of asphalt with high durability. However, the self-healing behaviors of graphene-modified asphalt ...

Microfluidic Channel-Based Soft Electrodes for Capacitive Pressure Sensing

Microfluidic Channel-Based Soft Electrodes and Their Application in Capacitive Pressure Sensing

Microfluidic Channel-Based Soft Electrodes and Their Application in Capacitive Pressure Sensing (Video) | JoVE 

基于微流控通道的软电极及其在电容式压力传感中的应用

Flexible and stretchable electrodes are essential components in soft artificial sensory systems. Despite recent advances in flexible electronics, most ...