基于声发射和分形的钢筋混凝土受剪梁损伤

doi:10.13229/j.cnki.jdxbgxb20191191

摘要/Abstract

摘要：

通过5根不同剪跨比和不同配箍率的钢筋混凝土梁受剪破坏试验，运用声发射检测技术和分形理论对混凝土梁细观和宏观损伤演化过程进行研究。根据梁受剪破坏过程中产生的声发射信号的能量和振铃计数等参数以及裂纹分形特征，定量分析了混凝土梁受剪损伤演化过程。试验结果表明：声发射振铃计数和能量随损伤程度呈三阶段变化，累计振铃计数和累计能量以及裂纹分形维数随荷载水平的增大而增大，增速随剪跨比的增大而增大，随配箍率的增大而减小，证明声发射参数可作为损伤程度的评价指标。通过建立累计声发射能量和荷载水平的相关关系，推导出了受剪梁损伤演化模型，并将损伤程度与梁表面裂纹分形维数建立相关关系，得到了混凝土梁受剪损伤评估方程，可为实际工程中受剪梁损伤评估提供参考。

关键词: 结构工程, 混凝土梁, 损伤, 声发射, 分形, 剪跨比, 配箍率

Abstract:

Through the shear failure test of five reinforced concrete beams with different shear span ratio and different hoop ratio， the damage evolution process of concrete beams was studied by using acoustic emission detection technology and fractal theory. Based on the parameters of acoustic emission signal energy， ringing count and crack fractal characteristics， the evolution of shear damage of concrete beams is quantitatively analyzed. Test results show that the acoustic emission ringing counts and energy with the damage degree are divided into three stages. The accumulate ringing count， energy and the fractal dimension of crack increase with load level. The growth rate of the crack increases with the shear span ratio， while decreases with increasing stirrup ratio， proving that the acoustic emission parameters can be used as a damage degree evaluation index. By establishing the correlation between the cumulative acoustic emission events and the load level， the damage evolution model of the shear beam is derived， and the correlation between the damage degree and the fractal dimension of the beam surface crack is established.

Key words: structural engineering, concrete beams, damage, acoustic emission, fractal, shear span ratio, stirrup ratio

中图分类号:

TU375.1

于江,赵志浩,秦拥军. 基于声发射和分形的钢筋混凝土受剪梁损伤[J]. 吉林大学学报(工学版), 2021, 51(2): 620-630.

Jiang YU,Zhi-hao ZHAO,Yong-jun QIN. Damage of reinforced concrete shear beams based on acoustic emission and fractal[J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(2): 620-630.

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参考文献 20

1	Yang Y.Shear Behaviour of Reinforced Concrete Members without Shear Reinforcement:A New Look at an Old Problem[M].TU Delft, Delft University of Technology, 2014.
2	余东. 钢筋混凝土变截面悬臂梁受剪及裂缝性能研究[D]. 长沙: 湖南大学土木工程学院, 2017.
	Yu Dong. The study on shear and cracking performence of reinforced concrete haunched cantilever beams[D]. Changsha: School of Civil Engineering, Hunan University, 2017.
3	张鹏. 配置HRB500箍筋混凝土梁斜裂缝试验研究[D]. 天津: 河北工业大学土木工程学院, 2015.
	Zhang Peng. Experimental research on diagonalcrack width of reinforced concretebeams with hrb500 stirrups[D]. Tianjin: School of Civil Engineering, Hebei University of Technology, 2015.
4	狄胜同, 贾超, 乔卫国, 等. 橡胶集料混凝土细观损伤特性的加载速率效应[J]. 吉林大学学报: 工学版, 2019, 49(6): 1900-1910.
	Di Sheng-tong, Jia Chao, Qiao Wei-guo, et al. Loading rate effect of meso-damage characteristics of crumb rubber concrete[J]. Journal of Jilin University (Engineering and Technology Edition), 2019, 49(6): 1900-1910.
5	梁宁慧, 缪庆旭, 刘新荣, 等. 聚丙烯纤维增强混凝土断裂韧度及软化本构曲线确定[J]. 吉林大学学报: 工学版, 2019, 49(4): 1144-1152.
	Liang Ning-hui, Miao Qing-xu, Liu Xin-rong, et al. Determination of fracture toughness and softening traction-separation law of polypropylene fiber reinforced concrete[J].Journal of Jilin University (Engineering and Technology Edition), 2019, 49(4): 1144-1152.
6	程永春, 张禹维, 焦峪波, 等. 基于导电膜的桥梁应变及裂缝监测试验[J]. 吉林大学学报: 工学版, 2016, 46(5): 1458-1463.
	Cheng Yong-chun, Zhang Yu-wei, Jiao Yu-bo, et al. Monitoring of strain and crack in bridge using conductive film[J]. Journal of Jilin University (Engineering and Technology Edition), 2016, 46(5): 1458-1463.
7	郭庆华, 郤保平, 李志伟, 等. 混凝土声发射信号频率特征与强度参数的相关性试验研究[J]. 中南大学学报: 自然科学版, 2015, 46(4): 1482-1488.
	Guo Qing-hua, Xi Bao-ping, Li Zhi-wei, et al. Experimental research on relationship between frequency characteristics of acoustic emission and strength parameter in concrete[J]. Journal of Central South University(Natural Science Edition), 2015, 46(4): 1482-1488.
8	段力群, 董璐, 马林建, 等. 泡沫混凝土单轴压缩下声发射特征试验研究[J]. 中国矿业大学学报, 2018, 47(4): 742-747.
	Duan Li-qun, Dong Lu, Ma Lin-jian, et al. Experimental study of acoustic emission characteristics of foamed concrete under uniaxial compression[J]. Journal of China University of Mining and Technology, 2018, 47(4): 742-747.
9	葛若东, 刘茂军, 吕海波. 钢筋混凝土梁破坏过程的声发射特征试验研究[J]. 广西大学学报: 自然科学版, 2011, 36(1): 160-165.
	Ge Ruo-dong,Liu Mao-jun,Lv Hai-bo.Experimental rasearch on acoustic emission characteristics of reinforced concrete beams during failure process[J]. Journal of Guangxi University (Natural Science Edition), 2011, 36(1): 160-165.
10	李旭, 霍林生, 李宏男. 基于声发射的钢筋混凝土梁承载能力评估[J]. 振动与冲击, 2013, 32(5): 6-9, 25.
	Li Xu, Huo Lin-sheng, Li Hong-nan. Carrying capacity assessment of reinforced concrete beam based on acoustics emission[J]. Journal of Vibration and Shock, 2013, 32(5): 6-9, 25.
11	Mandelbrot B B, Passoja D E, PaullayA J. Fractal character of fracture surfaces of metals[J]. Nature, 1984, 308: 721-722.
12	曹茂森, 任青文, 翟爱良, 等, 混凝土结构损伤的分形特征实验分析[J]. 岩土力学, 2005(10): 49-53.
	Cao Mao-sen, Ren Qing-wen, Zhai Ai-liang, et al.Experimental study on fractal characterization in damages of concrete structures[J]. Rock and Soil Mechanics, 2005(10): 49-53.
13	Saouma V E, Barton C C, Gamaleldin N.A fractal characterization of fracture surfaces in concrete[J]. Engineering Fracture Mechanics, 1990, 35: 47-53.
14	Issa M A, Hammad A M. Assessment and evaluation of fractal dimension of concrete fracture surface digitized images[J].Cement and Concrete Research, 1994, 24(2): 325-334.
15	Carpinteri A, Spagnoli A, Vantadori S. A multifractal analysis of fatigue crack growth and its application to concrete[J]. Engineering Fracture Mechanics, 2010, 77(6): 974-984.
16	Lacidogna G, Gianfranco P, Federico A, et al. Experimental investigation on crack growth in pre-notched concrete beams[J].Proceedings, 2018, 2(8): 429.
17	秦子鹏, 田艳, 李刚, 等. BFRP 布加固钢筋混凝土梁抗弯性能的分形特征研究[J]. 应用基础与工程科学学报, 2018, 26(5): 973-985.
	Qin Zi-peng, Tian Yan, Li Gang, et al. Study on fractal features of flexural performance of reinforced concrete beams strengthened with BFRP sheets[J]. Journal of Applied Fundamentals and Engineering Sciences, 2018, 26(5): 973-985.
18	蒋赏, 徐港, 赵恬悦. 冻融损伤混凝土梁抗力性能演化的裂缝分形特征[J]. 水电能源科学, 2018, 36(1): 124-127.
	Jiang Shang, Xu Gang, Zhao Tian-yue. Fractal characteristics of fracture resistance evolution of concrete beam subjected to freeze-thaw damage[J]. Hydropower Energy Science, 2018, 36(1): 124-127.
19	. 混凝土结构试验方法标准[S].
20	Ohtsu M, Isoda T, Tomoda Y. Acoustic emission techniques standardized for concrete structure[J]. Jourmnal of Acoustic Emission, 2007, 25: 22-32.

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试验梁参数	试验梁编号
试验梁参数	B1	B2	B3	B4	B5
剪跨比	1.5	2.0	2.5	2.5	2.5
加载跨度/mm	338	450	563	563	563
箍筋	?8@150	?8@150	?8@150	?8@200	?6@150
配箍率/%	0.45	0.45	0.45	0.36	0.25

试件编号	a	b	c	R²
B1	267 211	1.343 74	-43 814	0.902 7
B2	511 617	1.530 14	114 550	0.973 1
B3	157 054	2.428 85	-60 133	0.960 9
B4	198 070	2.653 11	11 593	0.992 5
B5	92 368	3.305 93	101 515	0.966 8