论文资料-闭合预应力钢丝绳论文：闭合预应力钢丝绳加固RC梁抗剪性能试验研究.doc

芀薄袃芃膆薃羅肆蒅薂蚅衿莁薂螇肅芇蚁袀袇膃蚀蕿肃聿虿蚂袆莈蚈袄肁莄蚇羆羄艿蚆蚆腿膅蚆螈羂蒄蚅袁膈莀螄羃羁芆螃蚂膆膂莀螅罿肈荿羇膄蒇莈蚇肇莃莇蝿芃艿莆袁肅膅莅羄袈蒃莄蚃肄荿蒄螆袇芅蒃袈肂膁蒂蚈袅膇蒁螀膀蒆蒀袂羃莂葿羅腿芈蒈蚄羁膄蒈螆膇肀薇衿羀莈薆薈膅芄薅螁羈芀薄袃芃膆薃羅肆蒅薂蚅衿莁薂螇肅芇蚁袀袇膃蚀蕿肃聿虿蚂袆莈蚈袄肁莄蚇羆羄艿蚆蚆腿膅蚆螈羂蒄蚅袁膈莀螄羃羁芆螃蚂膆膂莀螅罿肈荿羇膄蒇莈蚇肇莃莇蝿芃艿莆袁肅膅莅羄袈蒃莄蚃肄荿蒄螆袇芅蒃袈肂膁蒂蚈袅膇蒁螀膀蒆蒀袂羃莂葿羅腿芈蒈蚄羁膄蒈螆膇肀薇衿羀莈薆薈膅芄薅螁羈芀薄袃芃膆薃羅肆蒅薂蚅衿莁薂螇肅芇蚁袀袇膃蚀蕿肃聿虿蚂袆莈蚈袄肁莄蚇羆羄艿蚆蚆腿膅蚆螈羂蒄蚅袁膈莀螄羃羁芆螃蚂膆膂莀螅罿肈荿羇膄蒇莈蚇肇莃莇蝿芃艿莆袁肅膅莅羄袈蒃莄蚃肄荿蒄螆袇芅蒃袈肂膁蒂蚈袅膇蒁螀膀蒆蒀袂羃莂葿羅腿芈蒈蚄羁膄蒈螆膇肀薇衿羀莈薆薈膅芄薅螁羈芀薄袃芃膆薃羅肆蒅薂蚅衿莁薂螇肅芇蚁袀袇膃蚀蕿肃聿虿蚂袆莈蚈袄肁莄蚇羆羄艿蚆蚆腿膅蚆螈羂蒄蚅袁膈莀螄羃羁芆螃蚂膆膂莀螅罿肈荿羇膄蒇莈蚇肇莃莇蝿芃艿莆袁肅膅莅羄袈蒃莄蚃肄荿蒄螆袇芅蒃袈肂膁蒂蚈袅膇蒁螀膀蒆蒀袂羃莂葿羅腿芈蒈蚄羁膄蒈螆 闭合预应力钢丝绳论文：闭合预应力钢丝绳加固RC梁抗剪性能试验研究【中文摘要】闭合预应力钢丝绳(Prestressed Closed Wire rope Units, PCWRU)加固是一种新型的抗剪加固方法,能显著提高梁的极限抗剪承载力,明显改善构件变形能力和延性,在既有建筑结构加固中具有广泛应用前景。本文以实际框架梁为模型,主要开展了以下三个方面的研究:(1)锚具的开发与性能试验研究;(2)闭合预应力钢丝绳加固RC梁抗剪性能试验研究;(3)结合理论模型和试验结果,推导了闭合预应力钢丝绳加固RC梁抗剪承载力计算公式。共研制了6种不同形式的锚具,研究参数主要包括几何尺寸、构造形式和槽道形式。研究表明,相同尺寸下,异形锚具锚固效果较好,滑移小。与其它形式的锚具相比,波浪形锚具能明显改善对钢丝绳的损伤程度,总体锚固效果最佳,可作为闭合预应力钢丝绳锚固形式应用于工程加固。开展了5个利用预应力钢丝绳箍加固RC梁和一个对比试件抗剪性能试验。主要研究参数包括配绳率、预应力度和锚固形式,锚固形式包括波浪形和普通卡头锚固两种。研究结果表明,预应力钢丝绳箍可显著提高构件的极限承载力,明显改善试件的变形能力和延性。试件抗剪承载力随配绳率和预应力度变化不同,配绳率提高,承载力提高;预应力度增大,承载力先提高后下降。两种不同锚固形式对试件加固效果影响不明显。综合试验现象和试验结果,采用经典理论模型,分析了钢丝绳箍加固后受剪机理。考虑配绳率、预应力度的影响,提出了闭合应力钢丝绳加固RC梁抗剪承载力计算公式,计算结果与试验结果总体吻合良好。【英文摘要】As new strengthening technology, prestressed closed wire rope units(PCWRU) strengthening can effectively enhance the shear capacity, deformation capacity and ductibility of RC beam, and it exhibits wide prospect in the field of structural rehabilitation. In order to study the engreening application of PCWRU technology, following studies were carried out: (1) Experimental researches on developing anchorage and their property were carried out; (2) RC beams retrofitted by PCWRU were tested under shear load; (3) Combining the truss model and tested results, formulas to calculate the ultimate shear bearing capacity of RC beams retrofitted by PCWRU were proposed.Six different types of anchorage were developed, and the parameters included geometries, cofigurations and groove types. Test results show heteromorphic-groove anchorages have better anchoring property and less slip while in the same geometry. Compared with the other anchorages, and undee anchorage can alleviate the damage degree effectively to wire rope units and have the best anchoring effect. So it could be applied in the PCWRU strengthening.Researches on five specimens retrofitted by PCWRU and one control specimen of RC beam were carried out, and the parameters were ratio of wire rope units, prestress level and anchoring type including undee anchorage and holding fixture anchoring. Test restults show PCWRU could enhance the ultimate shear capacity of specimens significantly, as well as deformation capacity and ductibility. Shear capacity changes differently following the wire ratio and the prestress level, the shear capacity goes up as the wire ratio increases, while it goes up and then down as the prestress level increases.Two different anchoring systems have little effect on the retrofitting effect. Based on phenomenons and results of the test, using classic truss model, the shear resistant mechanism retrofitted by PCWRU was analysed. Considering the effect of wire ratio and prestress level, formulas were proposed to calculate the ultimate shear capacity, and the calculated results show good agreement with the tested ones.【关键词】闭合预应力钢丝绳 抗剪加固 混凝土梁 试验研究 抗剪承载力 受剪机理 桁架模型【英文关键词】prestressed closed wire rope units shear retrofit reinforced concrete beam experimental study shear capacity shear resistant mechanism truss model【目录】闭合预应力钢丝绳加固RC梁抗剪性能试验研究摘要4-5ABSTRACT5第一章 绪论8-201.1 概述81.2 抗剪加固背景8-101.3 混凝土结构常用加固方法简介10-121.3.1 直接加固法10-111.3.2 间接加固法11-121.4 混凝土（RC）梁抗剪加固综述12-171.4.1 增强复合纤维加固法12-141.4.2 粘贴加固法14-161.4.3 其它加固方法16-171.4.4 传统梁加固方法存在的问题171.5 钢丝绳加固梁抗剪性能研究现状及存在的问题17-201.5.1 钢丝绳材料概述17-181.5.2 钢丝绳加固梁抗剪性能研究现状18-191.5.3 钢丝绳加固梁抗剪性能研究存在的问题19-20第二章 预应力锚具性能实验研究20-262.1 引言202.2 预应力钢丝绳锚具性能试验研究20-242.2.1 夹板锚具锚固性能试验研究21-232.2.2 普通卡头锚固性能试验研究23-242.3 锚具受力性能理论分析24-252.4 小结25-26第三章 闭合预应力钢丝绳加固 RC 梁抗剪性能试验研究26-603.1 试件设计及制作26-323.1.1 试件尺寸和试验参数26-293.1.2 材料力学性能29-303.1.3 加固方案30-323.2 闭合预应力钢丝绳加固法施工工艺32-363.2.1 加固前期准备工作32-333.2.2 加固施工工艺33-363.3 试验装置及量测方案36-383.3.1 试验装置36-373.3.2 加载制度373.3.3 量测方案37-383.4 试验过程及现象分析38-533.4.1 试件破坏过程及特征38-453.4.2 应变量测结果与分析45-533.5 极限承载力及变形分析53-593.5.1 承载力分析553.5.2 变形分析55-563.5.3 承载力与变形能力影响因素分析56-593.6 小结59-60第四章 闭合预应力钢丝绳加固 RC 梁受剪机理及公式推导60-744.1 闭合预应力钢丝绳加固RC 梁受剪机理60-664.1.1 桁架理论模型60-624.1.2 桁架-拱模型62-654.1.3 极限平衡理论65-664.2 闭合预应力钢丝绳抗剪承载力理论分析66-714.2.1 钢丝绳加固梁破坏机理66-674.2.2 闭合预应力钢丝绳加固RC 梁抗剪承载力公式推导与计算67-714.3 公式理论与试验结果对比71-734.4 小结73-74第五章 结论与建议74-775.1 主要结论74-755.2 问题与建议75-77参考文献77-81个人简介81-82致谢82 螄蚇膄蒆薇羆膃膆螃袂膂芈薅袈膁蒀袁螄膁薃蚄肂膀节蒆羈腿莅蚂袄膈蒇蒅螀芇膇蚀蚆芆艿蒃羅芆莁虿羁芅薄蒁袇芄芃螇螃芃莆薀肁节蒈螅羇芁薀薈袃莀芀螃蝿羇莂薆蚅羆蒄螂肄羅芄薄羀羄莆袀袆羃葿蚃螂羃薁蒆肁羂芁蚁羇肁莃蒄袃肀蒅虿蝿聿膅蒂蚅肈莇螈肃肇蒀薀罿肇薂螆袅肆节蕿螁肅莄螄蚇膄蒆薇羆膃膆螃袂膂芈薅袈膁蒀袁螄膁薃蚄肂膀节蒆羈腿莅蚂袄膈蒇蒅螀芇膇蚀蚆芆艿蒃羅芆莁虿羁芅薄蒁袇芄芃螇螃芃莆薀肁节蒈螅羇芁薀薈袃莀芀螃蝿羇莂薆蚅羆蒄螂肄羅芄薄羀羄莆袀袆羃葿蚃螂羃薁蒆肁羂芁蚁羇肁莃蒄袃肀蒅虿蝿聿膅蒂蚅肈莇螈肃肇蒀薀