[1]董必钦,李达谦,张成杰,等.基于变形能的钢纤维混凝土断裂行为量化分析[J].西安建筑科技大学学报(自然科学版),2023,55(04):475-483.[doi:10.15986/j.1006-7930.2023.04.001 ]
　DONG Biqin,LI Daqian,ZHANG Chengjie,et al.Quantitative analysis of fracture behaviour of steel fibre concrete based on deformation energy[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2023,55(04):475-483.[doi:10.15986/j.1006-7930.2023.04.001 ]
点击复制

基于变形能的钢纤维混凝土断裂行为量化分析()
分享到：

西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
55
期数:
2023年04期
页码:
475-483
栏目:
出版日期:
2023-10-26

文章信息/Info

Title:
Quantitative analysis of fracture behaviour of steel fibre concrete based on deformation energy
文章编号:
1006-7930(2023)04-0475-09
作者:
董必钦; 李达谦; 张成杰; 王智毅; 洪舒贤
(深圳大学 土木与交通工程学院，广东 深圳 518060)
Author(s):
DONG Biqin;  LI Daqian;  ZHANG Chengjie;  WANG Zhiyi;  HONG Shuxian
(College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China)
关键词:
钢纤维混凝土;  断裂能;  数字图像相关;  变形能;  尺寸效应
Keywords:
steel fiber concrete;  fracture energy;  digital image correlation;  deformation energy;  size effect
分类号:
TU192
DOI:
10.15986/j.1006-7930.2023.04.001
文献标志码:
A
摘要:
混凝土在其断裂过程中所消耗的能量一部分用来扩展新的断面,另一部分需满足其内部发生弹塑性变形.这部分能量由于难以观测,在以往的混凝土断裂行为研究中常被忽视掉,进而带来不稳定的测试结果.本研究基于数字图像相关技术(Digital Image Correlation,DIC)与三维扫描技术(Three-dimensional Scanning System,TSS),通过获取钢纤维混凝土表面位移场与断裂面模型,计算断裂进程的能量消耗与断裂面积,同时分析与量化钢纤维混凝土的断裂行为,最终确定钢纤维混凝土断裂能.本中重点讨论此方法针对不同尺寸、不同缝高比的钢纤维混凝土断裂能修正情况.结果表明:改进后的断裂能计算方法相较于原方法在数值上平均下降了28%; 同时,改进后的计算方法显著降低了断裂能对试样尺寸与缝高比的敏感性,得到了更稳定、准确的断裂能计算值,从而弱化了纤维混凝土断裂能的尺寸效应现象.
Abstract:
The energy consumed by the concrete during its fracture process is partly used to expand the new section, and the other part is required to meet the elastic-plastic deformation inside the concrete. This part of energy is often overlooked in previous research on concrete fracture behavior due to its difficulty in observation, resulting in unstable test results. In this study, digital image correlation(DIC)and three-dimensional scanning system(TSS)were employed to obtain the displacement field and fracture surface model of steel fiber-reinforced concrete. Through these techniques, the energy dissipation during the fracture process and the fracture area were calculated, and the fracture behavior of steel fiber reinforced concrete was analyzed and quantified, ultimately determining the fracture energy of steel fiber reinforced concrete. The focus of this study was to discuss the correction of this method for the fracture energy of steel fiber reinforced concrete with different sizes and different crack height ratios. The results showed that the improved fracture energy calculation method was reduced by an average of 28% compared with the original method. Furthermore, the improved method significantly decreased the sensitivity of fracture energy to specimen size and crack-height ratio, providing more stable and accurate fracture energy values, thereby weakening the size effect phenomenon of fiber reinforced concrete fracture energy.

参考文献/References:

[1]JIA M,WU Z,HAN X,et al. Experimental investigation and modified calculation model of critical crack propagation length of concrete[J]. Theoretical and Applied Fracture Mechanics,2022,121(1): 1-11.
[2]卿龙邦,李庆斌,管俊峰,等. 基于虚拟裂缝模型的混凝土断裂过程区研究[J]. 工程力学,2012,29(9): 112-116.
QING Longbang,LI Qingbin, GUAN Junfeng,et al. Study of concrete fracture process zone based on fictious crack model[J]. Engineering Mechanics,2012, 29(9): 112-116.
[3]KHALILPOUR S,BANIASAD E,DEHESTANI M. A review on concrete fracture energy and effective parameters[J]. Cement and Concrete Research,2019,120: 294-321.
[4]PETERSON P E. Fracture energy of concrete: Method of determination[J]. Cement and Concrete Research,1980,10(1): 79-89.
[5]ELICES M,GUINEA G V,PLANAS J. On the measurement of concrete fracture energy using three-point bend tests[J]. Materials and Structures,1997,200(30): 375-376.
[6]PLANAS J,ELICES M,GUINEA G V. Measurement of the fracture energy using three-point bend tests: Part 2:Influence of bulk energy dissipation[J]. Materials and Structures,1992,149(25): 305-312.
[7]高丹盈,王占桥,钱伟,等. 钢纤维高强混凝土断裂能及裂缝张开位移[J]. 硅酸盐学报,2006(2): 192-198.
GAO Danying,WANG Zhanqiao,Qian Wei,et al. Fracture energy and crack opening displacement of steel fiber reinforced high strength concrete[J]. Journal of the Chinese Ceramic Society,2006(2): 192-198.
[8]LOFGREN I,STANG H,OLESEN J F. The WST method,a fracture mechanics test method for FRC[J]. Materials and Structures,2008,41(1): 197-211.
[9]胡若邻,黄培彦. 钢纤维增强聚合物改性高强混凝土断裂韧性的试验研究[J]. 应用基础与工程科学学报,2011,19(6): 963-970.
HU Ruolin,HUANG Peiyan.Experimental Study on Fracture Toughness of Steel Fiber-reinforced and Polymer-modified High-strength Concrete[J]. Journal of Basic Science and Engineering,2011,19(6): 963-970.
[10]YUAN F,CHENG L,SHAO X X,et al. Full-field measurement and fracture and fatigue characterizations of asphalt concrete based on the SCB test and stereo-DIC[J]. Engineering Fracture Mechanics,2020,235: 1-12.
[11]李方元,赵人达. 高强混凝土和钢纤维高强混凝土断裂性能试验研究[J]. 混凝土,2002(8): 29-32.
LI Fangyuan,ZHAO Renda. The experimental research on the fracture performance of high strength concrete and steel fibers high strength concrete[J]. Concrete, 2002(8): 29-32.
[12]KAZEMI M T,GOLSORKHTABAR H,BEYGI M H A,et al. Fracture properties of steel fiber reinforced high strength concrete using work of fracture and size effect methods[J]. Construction and Building Materials,2017,142: 482-489.
[13]ROSSI P,TAILHAN J L,LE MAOU F. Creep strain versus residual strain of a concrete loaded under various levels of compressive stress[J]. Cement and Concrete Research,2013,51: 32-37.
[14]傅强,赵旭,何嘉琦,等. 基于能量转化原理的混杂纤维混凝土本构行为[J]. 硅酸盐学报,2021,49(8): 1670-1682.
FU Qiang, ZHAO Xu,HE Jiaqi, et al. Constitutive response of hybrid basalt-polypropylene fiber-reinforced concrete based on energy conversion principle[J]. Journal of the Chinese Ceramic Society,2021, 49(8):1670-1682.
[15]朱志辉,冯乾朔,肖权清,等. 基于DIC技术和无网格法的裂尖应变场分析方法[J]. 土木工程学报,2021,54(6): 99-109.
ZHU Zhihui,FENG Qianshuo,XIAO Quanqing,et al. An analysis method for strain field of crack tip based on DIC technology and meshless method[J]. China Civil Engineering Journal,2021,54(6): 99-109.

相似文献/References:

[1]王艳,牛荻涛,苗元耀,等.弯曲荷载作用下钢纤维混凝土碳化性能[J].西安建筑科技大学学报(自然科学版),2015,47(01):51.[doi:10.15986/j.1006-7930.2015.01.010]
　WANG Yan,NIU Ditao,MIAO Yuanyao,et al.Carbonation of steel fiber reinforced concrete under flexural loading[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2015,47(04):51.[doi:10.15986/j.1006-7930.2015.01.010]
[2]戴 俊,吴 涛,曹 东,等.微波照射后钢纤维混凝土强度劣化研究[J].西安建筑科技大学学报(自然科学版),2014,46(01):6.[doi:10.15986/j.1006-7930.2014.01.002]
　DAI Jun,WU Tao,CAO Dong,et al.Study on the strength weakening rule of steel fiber reinforced concrete after microwave irradiation[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2014,46(04):6.[doi:10.15986/j.1006-7930.2014.01.002]

备注/Memo

备注/Memo:
收稿日期:2022-11-27修回日期:2023-07-18
基金项目:国家自然科学基金资助项目(52122907，U1801254，51925805)
第一作者:董必钦(1975—)，男，教授，博士.主要从事土木工程结构耐久性研究.E-mail:incise@szu.edu.cn
通信作者:洪舒贤(1982—)，女，教授，博士.主要从事滨海混凝土结构耐久性研究.E-mail:sxhong@szu.edu.cn
更新日期/Last Update: 2023-08-28