碳纤维编织网与聚丙烯纤维水泥基复合材料加固混凝土短圆柱的轴压试验及承载力计算

杨卓宇; 黄海林; 高亚强; 谭永杰

doi:10.3724/j.gyjzG23092008

碳纤维编织网与聚丙烯纤维水泥基复合材料加固混凝土短圆柱的轴压试验及承载力计算

doi: 10.3724/j.gyjzG23092008

1. 湖南科技大学土木工程学院, 湖南湘潭 411201;
2. 湖南科技大学湖南省智慧建造装配式被动房工程技术研究中心, 湖南湘潭 411201;
3. 湖南智谷投资发展集团有限公司, 长沙 410017

基金项目:

湖南科技创新计划项目(2023SK2014)

湖南省教育厅优秀青年项目(19B188)

湖南省自然科学基金青年基金项目(2018JJ3161)。

详细信息

作者简介:
杨卓宇,硕士研究生,主要从事基于织物增强混凝土的既有结构修复与加固研究,782755969@qq.com。

通讯作者:
黄海林,博士,教授,主要从事基于织物增强混凝土的既有结构修复与加固研究,hhlvsgenius@163.com。

计量
- 文章访问数: 77
- HTML全文浏览量: 11
- PDF下载量: 3
- 被引次数: 0
出版历程
- 收稿日期: 2023-09-20
- 网络出版日期: 2024-06-24

Axial Compressive Tests and Bearing Capacity Calculations for Short Circular Concrete Columns Strengthened with Woven Carbon Fiber Mesh and Polypropylene Fiber-Reinforced Cement-Based Composite Materials

1. College of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;
2. Hunan Engineering Research Center for Intelligently Prefabricated Passive House, Hunan University of Science and Technology, Xiangtan 411201, China;
3. Hunan Zhigu Investment and Development Group Co., Ltd., Changsha 410017, China

摘要

摘要: 通过对14个基于碳纤维编织网与聚丙烯纤维水泥基复合材料加固混凝土短圆柱的轴压性能试验,得到各试件的极限承载力和破坏形态,给出了各试件平均压应力-混凝土应变曲线、平均压应力-碳纤维编织网应变曲线及各试件极限承载力柱状图,分析了加固层水泥基复合材料中聚丙烯纤维含量、碳纤维编织网包裹层数及网格大小等参数对试件轴压性能及破坏机理的影响。试验结果表明:采用碳纤维编织网与聚丙烯纤维水泥基复合材料加固混凝土短圆柱可明显提高其极限承载力;试件主要破坏形态为纵向压劈破坏,脆性破坏特征明显;在小掺量情况下,加固层中聚丙烯纤维含量(质量比为0.05%,0.15%,0.25%)的改变对试件承载力的影响不明显;在一定范围内试件承载力随碳纤维编织网包裹层数的增加而提高;相比于边长为2 cm的方网格碳纤维编织网,边长为1 cm的方网格碳纤维编织网对试件承载力的提高效果更好。在引入4个合理的基本假定和2个强度模型的基础上,提出碳纤维编织网与聚丙烯纤维水泥基复合材料加固混凝土短圆柱的轴压承载力计算方法。采用该计算方法及相关文献的计算方法得到的理论计算值与试验结果进行比较,表明:采用所建议计算方法得到的理论计算值与试验结果吻合较好,且理论计算值均小于试验值,说明该计算方法具有一定安全储备。
- 碳纤维编织网 /
- 聚丙烯纤维水泥基复合材料 /
- 混凝土短圆柱 /
- 轴压试验 /
- 承载力计算
Abstract: Axial compressive tests of 14 short circular concrete columns strengthened with woven carbon fiber mesh and polypropylene fiber-reinforced cement-based composite materials were conducted. The ultimate bearing capacity and damage pattern of each specimen were obtained, the curves between average compressive stress and concrete strain, the curves between average compressive stress and strain of woven carbon fibers mesh, and the ultimate bearing capacity histogram of each specimen were given. The effects of parameters such as the polypropylene fiber content in the reinforced cement-based composite material, the number of layers and the grid sizes on the axial compressive performances and damage mechanisms of specimens were analyzed. The test results showed that the ultimate bearing capacity of the short circular columns reinforced with woven carbon fiber mesh and polypropylene fiber-reinforced concrete could be significantly improved; in the case of a small mass content, the changes in the polypropylene fiber content (with a mass content of 0.05%, 0.15%, 0.25%) in the reinforced layer had a little effect on the bearing capacity of specimens; the bearing capacity of specimens in a certain range increased with the number of layers of woven carbon fiber mesh. The bearing capacity of specimens increased with the increase in the number of wrapped layers of woven carbon fiber mesh; compared with the mesh with the grid of 2 cm×2 cm, the mesh with the grid of 1 cm×1 cm was more effective in improving the bearing capacity of specimens. By introducing four reasonable basic assumptions and two strength models, the calculation method of the axial compressive bearing capacity for composite reinforced columns with woven carbon fiber mesh and polypropylene fiber-reinforced cement-based composite materials was proposed. The theoretical calculated values obtained by the proposed method and the calculation methods from related literatures were compared with the test results, and the results showed that the theoretical values calculated by the proposed method were in good agreement with the test results, and the theoretical values were smaller than the test values. It was indicated that the proposed formula had certain safety reserve.
- woven carbon fiber mesh /
- polypropylene fiber-reinforced cement-based composite material /
- short circular concrete column /
- axial compressive test /
- bearing capacity calculation

HTML全文

参考文献(25)

[1]	张雨笛,程小卫,李易,等.FRP布加固混凝土框架子结构抗连续倒塌的精细有限元分析[J].工程力学,2022,39(12):151-164.
[2]	叶列平,冯鹏.FRP在工程结构中的应用与发展[J].土木工程学报, 2006,39(3):24-36.
[3]	琚宏昌,张凤,张贝宜,等.FRP复合材料在土木工程中应用的研究进展[J].混凝土, 2012(2):11-17.
[4]	高鹏,黄镜渟,周安,等. 玄武岩纤维布和碳纤维布加固高强混凝土柱轴压性能试验研究[J].工业建筑,2019,49(9):139-144 ,160.
[5]	DI LUDOVICO M, PROTA A, MANFREDI G. Structural upgrade using basalt fibers for concrete confinement[J]. Journal of Composites for Construction, 2010,14(5): 541-552.
[6]	刘泽平,张腾腾,王传林. 碳纤维布与玄武岩纤维布加固混凝土圆形短柱轴压试验对比研究[J].工程抗震与加固改造,2021,43(4):65-70.
[7]	郭晓云,陈杰,唐永明. 不同纤维增强复合材料加固混凝土短柱轴心受压承载力试验研究[J].复合材料科学与工程, 2021(8):66-72.
[8]	WEN Y C, HU Z J, LI A, LI Q H, et al. Experimental study on CFRP-confined circularized concrete-filled square steel tube short columns[J]. Advances in Materials Science and Engineering, 2021, 2021(1):1-13.
[9]	甘彬霖,冯旭海,宋朝阳,等.水胶比对聚丙烯纤维混凝土性能影响试验研究[J].混凝土,2022(8):36-39,44.
[10]	李福海,高浩,王江山,等.聚丙烯纤维混凝土梁裂缝发展的试验研究与模型计算[J].华南理工大学学报(自然科学版),2020,48(7):122-133.
[11]	齐鹏飞,陈珊珊,韩霄羽.干湿循环条件下聚丙烯纤维掺量对混凝土力学性能的影响[J].四川水泥,2022(12):9-11.
[12]	徐礼华,邓方茜,徐浩然,等. 钢-聚丙烯混杂纤维混凝土柱抗震性能试验研究[J].土木工程学报,2016,49(1):3-13.
[13]	徐礼华,黄乐,韦翠梅,等. 钢-聚丙烯混杂纤维混凝土柱抗震承载力试验研究[J].建筑结构学报,2014,35(8):95-103.
[14]	徐浩然. 钢-聚丙烯混杂纤维混凝土柱抗震性能研究[D].武汉:武汉大学, 2013.
[15]	黄海林,高亚强,徐勇逵,等.耐碱玻纤网格与聚丙烯混凝土复合加固方柱的轴压试验研究及承载力计算[J]. 建筑科学与工程学报,2023,40(3):70-82.
[16]	陈思程,黄海林,言兴,等.GRC网格与聚丙烯纤维混凝土复合加固混凝土圆柱轴压性能试验研究[J].建筑结构,2022,52(18):119-127.
[17]	YIN S P, PENG C, JIN Z Y. Research on mechanical properties of axial-compressive concrete columns strengthened with TRC under a conventional and chloride wet-dry cycle environment[J/OL]. Journal of Composites for Construction, 2017, 21(1)[2023-09-20].https://doi.org/10.1061/(ASCE)CC.1943-5614.0000225.
[18]	张伟. 聚丙烯纤维高强混凝土的力学性能试验研究[D]. 太原:太原理工大学, 2010.
[19]	高亚强. 碳纤维编织网与聚丙烯纤维混凝土复合加固短圆柱轴压性能研究[D]. 湘潭: 湖南科技大学, 2020.
[20]	YOUSSEF M N, FENG M Q, MOSALLAM A S. Stress-strain model of concrete confined by FRP composites[J]. Composites Part B: Engineering, 2007, 38(5/6):614-628.
[21]	SAMAAN M, MIRMIRAN A, SHAHAWY M. Model of concrete confined by fiber composites[J]. Journal of Structural Engineering, 1998, 124(9): 1025-1031.
[22]	刘栋梁.FRP加固混凝土柱承载力分析[D].哈尔滨:哈尔滨工程大学, 2007.
[23]	李玉鹏. 碳纤维布约束混凝土柱受压性能试验研究及理论分析[D].上海:同济大学,2006.
[24]	LAM L, TENG J G. Stress-strain model for FRP-confined concrete under cyclic axial compression[J]. Engineering Structures, 2009, 31(2):308-321.
[25]	卢亦焱,薛继锋,张学朋,等.外套钢管自密实混凝土加固钢筋混凝土中长圆柱轴压性能试验研究[J].土木工程学报,2013,46(2):100-107.