预应力碳纤维增强复材布加固大尺寸混凝土圆柱的应力损失试验研究

卢春玲; 张哲铭; 李柏林; 王鹏

doi:10.13204/j.gyjz202006028

预应力碳纤维增强复材布加固大尺寸混凝土圆柱的应力损失试验研究

doi: 10.13204/j.gyjz202006028

卢春玲^1,2,3,
张哲铭^1,2,
李柏林^1,2,
王鹏^1,2

1. 桂林理工大学土木与建筑工程学院, 广西桂林 541004;
2. 广西岩土力学与工程重点实验室, 广西桂林 541004;
3. 桂林理工大学, 广西有色金属隐伏矿床勘查及材料开发协同创新中心, 广西桂林 541004

基金项目:

国家自然科学基金项目（51568015）；广西创新驱动发展专项（桂科AA18118008）；广西岩土力学与工程重点实验室（2015-B-08）。

详细信息

作者简介:
卢春玲,女,1978年出生,博士。电子信箱:277342007@qq.com

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- 文章访问数: 85
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- 被引次数: 0
出版历程
- 收稿日期: 2019-12-20
- 刊出日期: 2020-08-20

EXPERIMENTAL RESEARCH ON STRESS LOSS OF LARGE-SIZED CONCRETE COLUMNS STRENGTHENED WITH PRESTRESSED CFRP SHEETS

1. College of Civil and Architecture Engineering, Guilin University of Technology, Guilin 541004, China;
2. Guangxi Key Laboratory of Rock-Soil Mechanics and Engineering, Guilin 541004, China;
3. Guilin University of Technology, Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi, Guilin 541004, China

摘要

摘要: 预应力碳纤维布（CFRPs）加固混凝土结构中预应力损失是影响加固效果的重要因素。为了研究预应力碳纤维布加固大尺寸混凝土圆柱时预应力损失的规律，通过自锁式锚具对碳纤维布进行环向加固。试验结果表明：摩擦损失为张拉过程中的主要损失，预应力越大、柱表面越粗糙、柱截面尺寸越大则摩擦损失值越大；持荷过程中为锚具变形、CFRPs布回缩与CFRPs布松弛产生的预应力损失；张拉过程中的摩擦损失占CFRPs布的总损失较大，为70.9%~80.8%，持荷后损失占总损失比例较小，为19.2%~29.1%；相同条件下直径1 m柱的CFRPs总损失比直径0.305 m柱的CFRPs总损失多17.1%~17.5%。在试验基础上，提出了张拉过程与持荷过程预应力损失计算表达式，为预应力损失计算提供参考。
- 碳纤维布 /
- 应力损失 /
- 锚具变形 /
- 弹性回缩
Abstract: The prestress loss of concrete structure reinforced with prestressed carbon fiber reinforced plastics (CFRP) is an important factor affecting the reinforcing effect. In order to study the prestress loss law of large-sized concrete column strengthened with prestressed carbon fiber reinforced plastics (CFRP). According to the law, the CFRP was strengthened annularly by self-locking anchorage. The test results showed that friction loss was the main loss in tension process. The larger the prestress, the rougher the surface of the column and the larger the size of the section of the column, the greater the friction loss. The prestressing loss was caused by the deformation of anchorage, the shrinkage of CFRP sheets and the relaxation of CFRP sheets. The friction loss in tension process accounted for 70.9% to 80.8% of the total loss of CFRP sheets, while the loss after loading accounted for 19.2% to 29.1% of the total loss. Under the same conditions, the total CFRP loss of 1 m diameter column was 17.1% to 17.5% higher than that of 0.305 m diameter column. On the basis of experiments, the formulas for calculating the prestress loss during tension and loading were presented, which could provide a reference for calculating prestress loss.
- CFRPs /
- prestress loss /
- anchorage deformation /
- elastic retraction

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参考文献(24)

卢春玲,魏峰,王强,等.预应力碳纤维复材布加固钢筋混凝土方形截面短柱轴压性能试验研究[J].工业建筑,2017,47(5):171-178.

ZHANG D, ZHAO Y, UEDA T, et al. CFRP Strengthened RC Beams with Pre-Strengthening Non-Uniform Reinforcement Corrosion Subjected to Post-Strengthening Wetting/Drying Cycles[J]. Engineering Structures, 2016, 127:331-343.

VERBRUGGEN S, TYSMANS T, WASTIELS J. TRC or CFRP Strengthening for Reinforced Concrete Beams:An Experimental Study of the Cracking Behaviour[J]. Engineering Structures, 2014, 77:49-56.

卢春玲, 李中洋, 黄博, 等. 预应力碳纤维复材布加固钢筋混凝土方柱轴压性能分析[J]. 工业建筑, 2018, 48(7):178-184.

COLOMBI P, FAVA G. Experimental Study on the Fatigue Behaviour of Cracked Steel Beams Repaired with CFRP Plates[J]. Engineering Fracture Mechanics, 2015, 145:128-142.

李涛,黄镜渟,周安,等.玄武岩纤维复材布加固素混凝土方柱轴压性能研究[J].工业建筑,2018,48(2):182-187.

黄辉,何箐,贾彬,等.碳纤维复材-钢复合板材单向拉伸力学性能试验研究[J].工业建筑,2019,49(3):6-11.

张伟超,李彪.玄武岩纤维布加固钢管研究[J].钢结构,2017,32(8):77-79.

黄镜渟,周安,詹炳根,等.玄武岩纤维布的力学性能和强度利用率研究[J].工业建筑,2019,49(3):1-5.

周军文,赵风华,鲁良辉,等.碳纤维增强复材布加固重组竹破坏梁的受弯性能试验研究[J].工业建筑,2018,48(10):190-194.

江世永, 蔡涛, 李雪阳. 碳纤维复合材料筋高韧性水泥基复合材料柱拟静力试验对比研究[J]. 工业建筑, 2018,48(9):181-186.

韩强, 温佳年, 杜修力, 等. CFRP布加固RC空心桥墩的抗震性能[J]. 土木工程学报, 2015(1):90-100.

王震宇, 马财龙, 乔鑫, 等. CFRP加固RC梁-板-柱框架中节点抗震性能试验研究[J]. 建筑结构学报,2016,37(5):226-232.

蔡斌, 赵良龙, 袁艳慧. CFRP加固锈蚀钢筋混凝土梁抗弯承载力可靠性[J]. 混凝土, 2016(10):148-151.

BAI F, DAVIDSON J S. Composite Beam Theory for Pretensioned Concrete Structures with Solutions to Transfer Length and Immediate Prestress Losses[J]. Engineering Structures, 2016, 126:739-758.

ZHU Y, WANG W. Incremental Differential Model for Long-Term Prestress Losses of Reinforced Concrete Beams Strengthened with Prestressed CFRP Sheets[J]. Journal of Chongqing University, 2015,38(4):61-66.

江胜华, 侯建国, 何英明. 考虑预应力损失的CFRP布加固钢筋混凝土梁正常使用极限状态可靠度研究[J]. 土木工程学报,2015(11):36-43.

陈永春, 马国强. 考虑混凝土收缩徐变和钢筋松弛相互影响的预应力损失的计算[J]. 建筑结构学报, 1981(6):31-46.

周长东, 李季, 吕西林. 预张拉纤维布约束混凝土圆柱预应力损失试验[J]. 同济大学学报(自然科学版).2012,40(12):1760-1765.

许晓, 艾军, 潘建伍, 等. 预应力纤维布加固钢筋混凝土小梁工艺及预应力损失试验研究[J]. 工业建筑,2013,43(12):129-132.

黄金林, 黄培彦, 郑小红. 预应力碳纤维板加固钢筋混凝土梁预应力损失试验研究[J]. 建筑结构学报,2015,36(1):85-91.

王文炜,戴建国,张磊. 后张预应力碳纤维布加固钢筋混凝土梁预应力损失试验及计算方法研究[J].土木工程学报,2012,45(11):88-94.

中华人民共和国交通运输部. 公路钢筋混凝土及预应力混凝土桥涵设计规范:JTG 3362-2018[S]. 北京:人民交通出版社,2018:71-72.

WANG W W,DAI J G,HARRIES K A, et al.Prestress Losses and Flexural Behavior of Reinforced Concrete Beams Strengthened with Post Tensioned CFRP Sheets[J]. Journal of Composites for Construction,2012,16(2):207-216.

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