极温冻融-荷载作用下碳纤维复合材料修复试件损伤分析

doi:10.13229/j.cnki.jdxbgxb20200301

Abstract

Abstract:

In order to study repair effect of concrete column wrapped Carbon Fiber Reinforced Plastics （CFRP） after extreme freeze-thaw environment， according to the requirements of code of China's current concrete durability （GB/T 50476—2008） and technical specifications for strengthening concrete structures with carbon fiber reinforced polymer laminate， axial pressure test was designed by concrete members wrapped by different spacing and dosage CFRP after freeze-thaw cycle 0 times， 50 times， 50 times， 100 times， 150 times and 200 times. The compression properties of concrete repaired with CFRP were studied by sample microstructure and considering three factors： compression load， vertical overall displacement and the ratio of expansion and compression. The results show the freeze-thaw has a more significant impact on compressive strength， but the compressive strength of freezing-thawing damaged concrete can be improved effectively after CFRP repair， up to 630.6%， and the improvement of the bearing capacity of specimens repaired with CFRP is not related to the repair spacing， but to the fiber amount of CFRP. The overall vertical displacement increases with the increase of freezing-thawing times， and decreases with the increase of the repaired CFRP. With the freezing-thawing cycle， the ratio of expansion and compression first decreases， then increases and then decreases， and the first peak value first increases and then decreases， and the second peak gradually decreases from the "convex" peak gradually to the peak of the collapse of the concave， and the distance between the two peaks gradually decreases. Through microstructure analysis， thechange of the ratio of expansion and compression is mainly caused by freezing-thawing increasing compression and hoop effect of CFRP.

Key words: civil engineering, carbon fiber reinforced plastics, freez-thaw cycle test, pressure teste, microstructure analysis, break model

CLC Number:

TU531

Shuan-cheng GU,Hong-bin NIE. Analysis of damage model of mortars strengthened with CFRP under ultimate freeze⁃thaw and load[J].Journal of Jilin University(Engineering and Technology Edition), 2021, 51(6): 2108-2120.

Figures/Tables 18

Table 1

Table 2

Table 3

Table 4

Fig.1

Table 5

Fig.2

Fig.3

Fig.4

Table 6

Characteristics table on destruction of the specimen"

编号	极限承载力/kN	开裂载荷/kN		破坏类型		第1次突变值 /kN	突变率 $β$ /%	第2次突变值/kN	突变率 $γ$ /%
编号	极限承载力/kN	混凝土	CFRP	混凝土	CFRP	第1次突变值 /kN	突变率 $β$ /%	第2次突变值/kN	突变率 $γ$ /%
1?1	283.261	180.213	-	3条裂缝	-	14.446	5.1	-	-
1?2	151.611	46.254	-	5条裂缝	-	47.606	31.4	119.014	88.6
1?3	56.112	23.823	-	6条裂缝	-	14.480	25.8	47.807	85.2
1?4	39.871	14.156	-	8条裂缝	-	4.066	10.3	12.041	30.2
1?5	12.213	3.232	-	12条裂缝	-	1.234	10.1	8.561	27.9
2?1	347.701	-	88.231	压碎	4 凹凸屈曲	18.776	5.4	135.951	39.1
2?2	220.262	-	65.982	压碎	5 凹凸屈曲	25.991	11.8	188.554	85.6
2?3	196.672	-	53.261	压碎	3局部屈曲	51.725	26.3	-	-
2?4	151.784	-	47.271	压碎	2 凹凸屈曲	47.357	31.2	135.84	89.5
2?5	89.231	-	40.236	压碎	未发生屈曲	28.019	31.4	60.052	67.3
3?1	323.314	253.478	12.342	2条裂缝	纤维断裂	20.045	6.2	99.579	30.8
3?2	196.407	147.305	14.210	2条裂缝	纤维断裂	34.175	17.4	167.142	85.1
3?3	100.961	61.586	10.499	4条裂缝	未破坏	11.207	11.1	-	-
3?4	61.219	35.752	7.346	5条裂缝	未破坏	7.530	20.3	58.241	78.8
3?5	50.231	24.110	6.530	7条裂缝	未破坏	15.471	30.8	31.193	62.1
4?1	330.234	231.163	19.814	4条裂缝	未破坏	16.841	5.1	77.275	23.4
4?2	139.841	103.482	9.789	7条裂缝	未破坏	41.673	29.8	100.838	76.4
4?3	112.128	90.824	8.409	6条裂缝	未破坏	18.2768	26.4	-	-
4?4	67.231	57.146	5.647	8条裂缝	未破坏	11.497	17.1	30.388	45.2
4?5	59.634	51.881	5.367	12条裂缝	未破坏	10.078	16.9	25.106	42.1

Table 6

Table 7

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

References 17

1	岳清瑞,陈小兵,牟宏远.碳纤维材料(CFRP)加固修补混凝土结构新技术[J].工业建筑,1998(11):1-5, 34.
	Yue Qing-rui,Chen Xiao-bing,Mu Hong-yuan. New technology of carbon fibre reinforced plastics on strengthening & repairing concrete structures[J]. Industrial Construction, 1998(11):1-5, 34.
2	叶列平,赵树红,李全旺,等.碳纤维布加固混凝土柱的斜截面受剪承载力计算[J].建筑结构学报,2000(2):59-67.
	Ye Lie-ping, Zhao Shu-hong, Li Quan-wang,et al. Caleulation of shear strength of concrete column strengthened with carbon fibre reinforced plastics[J].Journal of Building Structures,2000(2):59-67.
3	赵彤,张景明,谢剑,等.碳纤维布改善钢筋混凝土短柱延性的试验研究[J].世界地震工程,2001(1):82-86.
	Zhao Tong, Zhang Jing-ming, Xie Jian, et al. Experimentls study on the application of continuous carbon fibre reinforced plastics sheet to improve the dyctility of reinforced concrete short columns[J].World Information of Earthquake Enginering,2001(1):82-86.
4	陈少雄. 碳纤维布和角钢复合加固钢筋混凝土柱抗震性能研究[D].武汉:武汉大学土木建筑工程学院,2004.
	Chen Shao-xiong. Experimental research on seismis behavior of reinforced concrete columns combination rehabilitation with bonded steel angles and carbon fibre reinforced plastics sheet[D]. Wuhan:School of Civil Engineering,Wuhan University,2004.
5	卢亦焱,童光兵,赵国藩,等.外包角钢与碳纤维布复合加固钢筋混凝土偏压柱承载力计算分析[J].土木工程学报,2006(8):19-25.
	Lu Yi-yan, Tong Guang-bing, Zhao Guo-fan,et al. Analysis of the bearing capacity of RC eccentr ic compression columns encased in angle steels and strengthened with CFRP[J].China Civil Engineering Journal,2006(8):19-25.
6	顾冬生,吴刚,吴智深,等.CFRP加固高轴压比钢筋混凝土短圆柱抗震性能试验研究[J].工程抗震与加固改造,2006(6):71-77.
	Gu Dong-sheng, Wu Gang, Wu Zhi-shen,et al. Experimental study on seismic performance of RC short circular columns strengthened with CFRP composites under high-level compression[J].Earthquake Resistant Engineering and Retrofitting,2006(6):71-77.
7	苑寿刚. CFRP约束带载加固混凝土柱滞回性能试验研究[D].沈阳:东北大学资源与土木工程学院,2009.
	Yuan Shou-gang. Experimental study on the hysteretic behavior of preloaded concrete columns with CFRP confinement[D]. Shenyang:College of Resources and Civil Engineering,Northeastern University,2009.
8	李趁趁,高丹盈,赵军.干湿环境下FRP全裹与条带间隔加固混凝土圆柱耐久性试验研究[J].土木工程学报,2009,42(11):8-14.
	Li Chen-zhen, Gao Dan-ying, Zhao Jun. Experimental study on durability of FRP entirely-wrapped concrete cylinders and FRP strip-wrapped concrete cylinders under wet-dry cycles insaltsolution[J]. China Civil Engineering Journal, 2009,42(11):8-14.
9	聂红宾. CFRP布加固冻融损伤混凝土构件力学性能研究[D].沈阳:沈阳大学,2013.
	Nie Hong-bin. Research on behavior of freeze-thaw damageable concrete members strengthened by CFRP sheets[D].Shenyang:Shenyang University,2013.
10	张凯,姜福香,殷彦波.冻融循环下CFRP加固混凝土结构耐久性试验研究[J].工程建设,2015,47(1):7-11, 19.
	Zhang Kai, Jiang Fu-xiang, Yin Yan-bo. Experimental study on durability of concrete structure reinforced with CFRP in freeze-thaw cycle[J]. Engineering construction,2015,47(1):7-11, 19.
11	王苏岩,宋泽林,丁荔.冻融循环与持载对CFRP加固高强混凝土梁变形性能的影响[J].建筑科学与工程学报,2017,34(2):26-32.
	Wang Su-yan,Song Ze-lin,Ding Li.Influence of freeze-thaw cycles and sustained loads on deformation performance of high strength concrete beam strengthened with CFRP[J]. Journal of Architecture and Civil engineer,2017,34(2):26-32.
12	洪雷,江海鑫,王苏岩.冻融循环下预应力CFRP加固高强混凝土耐久性[J].铁道科学与工程学报,2017,14(2):227-232.
	Hong Lei, Jiang Hai-xin, Wang Su-yan. Durability of high strength concrete strengthened with prestressed CFRP under freeze-thaw cycles[J]. Journal of Railway Science and Engineering,2017,14(2):227-232.
13	何媛媛,武丽,董江峰,等.CFRP加固对冻融再生混凝土短柱承载性能的影响[J].建筑材料学报, 2019, 22(3):451-458, 466.
	He Yuan-yuan, Wu Li, Dong Jiang-feng,et al. The effects of CFRP reinforcement on the strength of recycled concrete column under cycled feeze-thaw environment[J]. Journal of Building Materials, 2019, 22(3):451-458, 466.
14	普通混凝土长期性能和耐久性能试验方法标准:[S]. 北京: 中国建筑工业出版社, 2009.
15	段安. 受冻融混凝土本构关系研究和冻融过程数值模拟[D].北京:清华大学土木工程系,2009.
	Duan An. Research on constitutive relationship of frozen-thawed concrete and mathematical modeling of freeze-thaw process[D]. Beijing:Department of Civil Engineering,Tsinghua University, 2009.
16	杨苗苗,封建湖,程晓晗,等. 求解复杂交通流模型的低耗散中心迎风格式[J]. 计算机工程, 2019, 45(6): 37-44.
	Yang Miao-miao,Feng Jian-hu,Cheng Xiao-han,et al. Low dissipation central-upwind scheme for solving complex traffic flow model[J]. Computer Engineering, 2019, 45(6): 37-44.
17	李趁趁. FRP加固混凝土结构耐久性试验研究[D].大连:大连理工大学建设工程学部,2006.
	Li Chen-chen. Experimental study on durability of FRP reinforced concrete structures [D].Dalian: Faculty of Infrastructure Engineering,Dalian University of Technology,2006.

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里程	最高温度/℃	最低温度/℃	里程	最高温度/℃	最低温度/℃
D1K222+648.944	23	-37	DK249+995.208	8	-39
D1K222+672.843	69	-25	DK250+5.321	20	-32
D1K222+648.944	46	-14	DK250+12.984	27	-26
D3K229+81.880	12	-34	DK264+750	13	-40
D3K229+102.346	20	-27	DK264+762.321	20	-31
D3K229+113.458	23	-18	DK264+780.124	24	-27

配合比	水泥	水	砂	碎石
配合比	300	185	728	1093
碎石	孔径/mm	16	10	5
碎石	筛余量	3.15	3.9	1.75
砂	直径/mm	1	0.5	0.25
砂	筛余量	1.5	6.48	0.2

CFRP类型	抗拉强度/MPa	标准尺寸/mm	弹性系数/GPa	延伸率 /%	编号
JGN	3501	30.07	240	1.627	Ⅰ
JGN	3491	24.50	232	1.425	Ⅱ

冻融次数/N	质量损失率/%	弹性模量损失率/%	损伤评价
0	0	0	对比组
25	0.24938	4.645	适应期
50	2.175	31.357	损伤
75	3.8413	42.016	损伤
100	5.4418	69.659	损伤
125	6.6325	81.436	破坏
150	7.8254	89.326	破坏
175	9.1311	98.347	破坏
200	10.2314	----	破坏

冻融循环次数/n	未修复损失率/%	全包未修复损失率/%	修复间距100 mm试件损失率/%	修复间距200 mm试件损失率/%
0	0.000	0.000	0.000	0.000
50	46.477	36.652	39.252	57.654
100	80.191	43.436	68.773	66.046
150	85.924	56.346	81.065	79.641
200	95.688	74.337	84.464	81.942

Analysis of damage model of mortars strengthened with CFRP under ultimate freeze⁃thaw and load

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