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粘贴多层碳纤维布抗弯加固的构造分析 - 施工技术.pdf 2页
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粘贴多层碳纤维布抗弯加固的构造分析 - 施工技术
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粘贴多层碳纤维布抗弯加固的构造分析
屈文俊，黄海群
（同济大学，上海 .///2. ）
［摘要］针对多层碳纤维布抗弯加固常见的两种构造措施（内短外长和外短内长），分析其传力路径、施工质量的可
靠性、剥离失效的可能性以及粘结锚固性能等，指出内短外长的构造措施具有较明显的优越性。
［关键词］多层碳纤维布；抗弯加固；构造措施
［中图分类号］
［文献标识码］
［文章编号］
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下载：2积分结果表明，运用人工神经网络对碳纤维布与混凝土的极限粘结强度进行预测是可行的。
The results show that ANN is a feasible tool for predicting the ultimate bond strengths of CFRP bonded to concrete.
同时利用基于该理论所建立的公式解释了碳纤维布与混凝土的剥离、碳纤维布断裂以及混凝土压碎等试验现象的发生过程。
The analytic formulas were used to illustrate the process of the delamination failure, rupture of CFRP sheet and crush of concrete.
通过32个混凝土圆形试块的轴压试验，研究了碳纤维布约束混凝土的受压性能。
Through axially compressed tests of 32 cylinder concrete columns, the performance of concrete confined by carbon fiber composite sheets is studied.
在试验结果基础上，对预张拉碳纤维布加固混凝土梁的使用性能进行了总结。
Based on the results of experiments, the serviceability of reinforced concrete beams strengthened by pre-tensioned carbon fiber composite plastic sheets was summarized.
碳纤维布加固混凝土结构是一种新型结构加固方法。
Concrete structures strengthened with carbon fiber reinforced plastic sheet (CFS) is a new retrofit method in the field of civil engineering.
同时对碳纤维布加固混凝土渡槽的工艺要求做了简要的介绍。
At the mean time, the process demands of CFRP (carbon-fibre reinforced plastic) reinforced concrete aqueduct are briefly introduced.
基于有限元程序ANSYS，对碳纤维布约束混凝土方柱进行了数值模拟。
Based on the finite element software ANSYS, the CFRP-confined concrete square columns were numerically simulated.
通过16个混凝土方形试件的轴压试验，研究了碳纤维布约束混凝土方柱的受压性能。
Through axially compressed tests of 16 concrete prisms, mechanical behavior of concrete prisms confined by carbon fiber composite sheets is investigated.
通过用数字散斑相关方法（DSCM）对碳纤维布加固混凝土梁的实验，研究了碳布加固混凝土梁的承载力及变形行为。
An experimental study of the strength and deformation characteristics of carbon-fiber-sheet -reinforced concrete beams using digital speckle correlation method (DSCM) was performed.
如今，碳纤维布加固混凝土结构技术在结构加固领域广泛应用。
The technique of carbon fiber sheet(CFS) strengthening concrete structure has been widely used in the structure strengthening field.
粘贴碳纤维布加固混凝土结构技术是一项新型的结构加固技术，可在环境可恶劣的情况下使用，养护简便。
It is a new technology to reinforce concrete by affixing carbon fabric, which can be used in bad condition, and can maintain easily.
碳纤维布加固混凝土结构是一种新型的结构加固方法。
The rehabilitation of reinforced concrete structures with CFRP laminates is a new reinforcement technique.
进行了八根碳纤维布加固混凝土方形截面柱的轴心受压试验研究，着重探讨了碳纤维布不同净间距、不同幅宽、不同转角曲率半径等因素对加固效果的影响。
Eight concrete columns strengthened with carbon fiber reinforced polymer laminates were tested. The effect of different spacing, widths and curvature radii of CFRP on strengthening were studied.
试验研究表明：碳纤维布对钢筋混凝土柱的承载能力具有良好的补强加固效果。
The results indicate that the carbon fiber sheet could effectively increase the flexural strength of reinforced concrete columns.
试验结果表明，与非预应力碳纤维布加固梁相比，预应力碳纤维布加固后混凝土梁中受拉钢筋应力幅显著降低，混凝土梁疲劳寿命明显延长。
Experimental results show that the stress amplitude of the tensioned bar is decreased remarkably and the fatigue life is then obviously increased as compared to normal strengthening method.
本文主要研究了碳纤维布对钢筋混凝土T梁的抗剪加固。
In this paper, shear capacity of existing RC T-section beams using CFRP composites is discussed.
本文为进一步研究碳纤维布对钢筋混凝土T梁桥加固及数值分析方法研究奠定了理论基础，同时也为桥梁加固实践提供了设计计算<span id="src_16_22" onmouseover="hlgt('#src_16_22,#tran_16_17')" onmouseo上传用户：lbqwwcefyu资料价格：5财富值&&『』文档下载 ：『』&&『』学位专业：&关 键 词 ：&&&&&&&&权力声明：若本站收录的文献无意侵犯了您的著作版权，请点击。摘要:（摘要内容经过系统自动伪原创处理以避免复制，下载原文正常，内容请直接查看目录。）现实工程中，应用碳纤维布资料(CFRP)对锈蚀钢筋混凝土梁停止受弯加固，重要有直接贴布和置换混凝土掩护层后再粘贴纤维布加固两种可选方法。不管采取哪一种方法，都邑因为锈胀裂痕或新旧混凝土粘结成绩在加固梁纵筋地位中构成软弱界面。构成的软弱界面，极有能够影响加固梁碳纤维布的剥离损坏行动。现有关于碳纤维布剥离行动的研讨还没有斟酌此种软弱界面的报导，该成绩具有较年夜的研讨意义。本文基于实验研讨的手腕，共设计13根带有这两品种似程度软弱界面的CFRP布加固钢筋混凝土梁试件，受弯加载下停止剥离实验，变更了界面粘结强度、碳纤维布加固量、掩护层厚度、U型箍束缚等参数。研讨成果注解，两品种型的软弱界面的存在易招致中部掩护层剥离过早产生，并向端部成长，减弱了加固系统的全体性，无束缚前提下纵向CFRP产生全体剥离。界面减弱越严重，加固量越年夜，掩护层厚度越小，界面剪切传递才能越弱，剥离损坏越易产生和成长。U形箍束缚能避免纵向CFRP全体剥离损坏，包管其有用受力，但不克不及完整避免部分剥离沿软弱界面成长，易招致纵向CFRP在复合受力前提下过早断裂，且存在较高的端部锚固损坏的风险。别的比拟了材性实验CFRP剥离、加固梁剥离在损坏进程、损坏机理上的异同。总结了现有文献中剥离相干盘算模子，经试算后比拟了各模子的准确度；联合实验及这些盘算实际，摸索性地给出斟酌软弱界面存在时的加固梁受弯承载力盘算办法。Abstract:In practical engineering, the application of carbon fiber cloth material (CFRP) on the corrosion of reinforced concrete beams strengthened by bending, it is important to direct bonding and replacement of concrete cover layer after the two alternative methods of fiber cloth reinforcement. No matter what kind of method to take the cities because of the corrosive cracks or new and old concrete bond results in the strengthened beam longitudinal reinforcement position constitute weak interface. Composition of the weak interface, there is a very capable of affecting the strengthening of carbon fiber cloth reinforced cloth strip damage action. Existing research on carbon fiber cloth stripping action has not yet considered such a weak interface, the results have a greater significance. In this paper, based on the experimental study of the wrist, a total design of two with the 13 varieties of CFRP cloth reinforced concrete beams with a degree of weakness of the reinforced concrete beams, under the bending load to stop stripping experiment, change the interface bond strength, carbon fiber cloth reinforcement amount, cover layer thickness, U hoop binding parameters. Research results note, the presence of two varieties of weak interface is easy to lead to the release of the central shield layer premature, and to the end of the growth, weakening of the whole system of the reinforcement, no restraint under the premise of a total of longitudinal. The more serious the weakening of the interface, the greater the amount of reinforcement, the smaller the thickness of the cover layer, interface shear transfer ability is weak, the more easy to produce and grow. U hoop restraint can avoid all of the longitudinal CFRP stripping damage, to ensure its useful force, but can not completely avoid partial stripping along the weak interface growth, easily lead to premature fracture in the composite under the premise of CFRP stress, and there is a high risk of end anchorage damage. The similarities and differences in the process of damage and the damage mechanism of the beams are compared with other materials which have been compared with the material experiment CFRP. Summarizes the existing literature in stripping coherent computation model, after trial compared the a combined experimental and these plans to the actual touch simply to give consider weak interface in the presence of reinforced concrete beams flexural force calculation methods.目录:摘要3-4ABSTRACT41 绪论9-25&&&&1.1 混凝土结构加固方法9-10&&&&1.2 碳纤维材料在混凝土结构加固中的应用和发展10-14&&&&&&&&1.2.1 碳纤维材料的特点12&&&&&&&&1.2.2 相关规范12-13&&&&&&&&1.2.3 碳纤维材料加固钢筋混凝土结构的方法13-14&&&&1.3 碳纤维布加固钢筋混凝土梁的剥离破坏14-22&&&&&&&&1.3.1 定义和分类14-15&&&&&&&&1.3.2 相关试验研究15-18&&&&&&&&1.3.3 现有剥离计算理论18-22&&&&1.4 加固梁中薄弱界面的产生原因22-23&&&&1.5 本文的研究意义和主要研究内容23-252 试验方案及试验过程25-38&&&&2.1 剥离试验方案25-26&&&&2.2 试验材料26-28&&&&&&&&2.2.1 水泥26&&&&&&&&2.2.2 骨料26&&&&&&&&2.2.3 钢筋26&&&&&&&&2.2.4 碳纤维布26-27&&&&&&&&2.2.5 混凝土配合比设计27-28&&&&2.3 试件制作及薄弱界面材性测试方法28-33&&&&&&&&2.3.1 A组试件制作过程28-29&&&&&&&&2.3.2 B组试件制作过程29-30&&&&&&&&2.3.3 凿毛面粗糙度测试方法30-31&&&&&&&&2.3.4 薄弱界面材性试验31-33&&&&2.4 混凝土梁加固方案与流程33-34&&&&2.5 加载方案与测点布置34-37&&&&&&&&2.5.1 试件应变片布置34-35&&&&&&&&2.5.2 受弯剥离试验装置35-36&&&&&&&&2.5.3 加载装置36-37&&&&2.6 本章小结37-383 试验结果及其分析38-73&&&&3.1 材性试验结果38&&&&3.2 薄弱界面力学特性结果38-41&&&&&&&&3.2.1 新旧混凝土界面劈裂结果38-39&&&&&&&&3.2.2 新旧混凝土界面剪切试验结果39-41&&&&3.3 剥离试验现象及结果41-55&&&&&&&&3.3.1 试验现象及最终破坏形态41-49&&&&&&&&3.3.2 梁底碳纤维布应变-荷载关系49-53&&&&&&&&3.3.3 跨中截面各位置应变-荷载关系53-55&&&&3.4 剥离试验结果分析55-72&&&&&&&&3.4.1 粘结应力计算57&&&&&&&&3.4.2 剥离特征参数57-59&&&&&&&&3.4.3 新老混凝土弱界面对CFRP剥离的影响59-63&&&&&&&&3.4.4 预设裂缝弱界面对CFRP剥离的影响63-65&&&&&&&&3.4.5 CFRP加固量影响65-67&&&&&&&&3.4.6 保护层厚度影响67-68&&&&&&&&3.4.7 U型箍约束有效性68-72&&&&3.5 本章小结72-734 剥离比较分析及建议的计算模型73-87&&&&4.1 材性试验剥离73-78&&&&&&&&4.1.1 剥离过程及最终形式73-76&&&&&&&&4.1.2 剥离极限荷载计算模型76-78&&&&4.2 普通钢筋混凝土加固梁剥离78-80&&&&&&&&4.2.1 剥离过程及最终形式78-79&&&&&&&&4.2.2 剥离计算模型比较79-80&&&&4.3 存在薄弱界面的加固梁剥离80-85&&&&&&&&4.3.1 剥离特点及最终形式80-81&&&&&&&&4.3.2 试验剥离应变与各模型应变限值的比较81-83&&&&&&&&4.3.3 建议的计算方法83-85&&&&&&&&4.3.4 建议的模型计算值与试验值比较85&&&&4.4 本章小结85-875 主要结论与展望87-89&&&&5.1 结论87-88&&&&5.2 展望88-89参考文献89-97致谢97-98附录I 攻读硕士学位期间发表论文情况98-99分享到：相关文献|碳纤维混凝土的特性及发展前景_百度文库
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