Study on Fracture Characteristics of V⁃notched Concrete Beams

Gusheng TONG; Xiang LUO

doi:10.13409/j.cnki.jdpme.2020.04.021

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Study on Fracture Characteristics of V⁃notched Concrete Beams

更新时间：2025-09-25

- Study on Fracture Characteristics of V⁃notched Concrete Beams
- Journal of Disaster Prevention and Mitigation Engineering Vol. 40, Issue 4, Pages: 655-663(2020)
- 作者机构：
  
  华东交通大学土木建筑学院，江西南昌 330013
- 作者简介：
- 基金信息：
- DOI：10.13409/j.cnki.jdpme.2020.04.021
  CLC： TU443
- Received：28 August 2018，
  
  Revised：2018-12-21，
  
  Published：15 August 2020
- 稿件说明：
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童谷生,罗翔.含V型切口混凝土梁I、II复合型断裂特性研究[J].防灾减灾工程学报,2020,40(04):655-663.

TONG Gusheng,LUO Xiang.Study on Fracture Characteristics of V⁃notched Concrete Beams[J].Journal of Disaster Prevention and Mitigation Engineering,2020,40(04):655-663.
童谷生,罗翔.含V型切口混凝土梁I、II复合型断裂特性研究[J].防灾减灾工程学报,2020,40(04):655-663. DOI： 10.13409/j.cnki.jdpme.2020.04.021.

TONG Gusheng,LUO Xiang.Study on Fracture Characteristics of V⁃notched Concrete Beams[J].Journal of Disaster Prevention and Mitigation Engineering,2020,40(04):655-663. DOI： 10.13409/j.cnki.jdpme.2020.04.021.

摘要

通过采用三点弯曲加载，结合电阻应变片法以及数字图像相关法，研究初始缝高比、偏心距以及切口角度对V型切口混凝土梁荷载值和断裂过程区的影响，最后运用有限断裂力学进行理论分析，并与平均应力准则做比较。试验结果说明，起裂荷载和破坏荷载的变化随着缝高比的增大而减小，不同范围内的切口角度对起裂荷载和破坏荷载的影响也有差别，起裂荷载和破坏荷载随着加载偏心距增加而增大起裂时刻和最大荷载时刻的断裂过程区等于裂缝长度，而失稳时断裂过程区远远小于裂缝长度，断裂过程区以切口角度120°为界，具有不同的变化趋势；平均应力准则下的裂缝扩展长度随着切口角度的增加整体呈现下降趋势，无论是临界破坏荷载还是裂缝扩展角度，有限断裂力学准则的理论预测值较平均应力准则更为接近试验结果。

Abstract

Using three-point bending loading and combining with resistance strain gauge method and digital image correlation method

the effects of initial seam height ratio

eccentricity and notch angle on the load value and fracture process area of V-notched concrete beam are studied. Finally

finite fracture mechanics is applied to conduct theoretical analysis. The result is compared with the average stress criterion. The test results show that the variation of the cracking load and the failure load decrease with the increase of the joint height ratio. The notch angles in different ranges have different impact on the cracking load and the breaking load. The cracking load and the breaking load increase with the eccentricity. The fracture process zone corresponding to the time of crack initiation and the maximum load is equal to the length of the fracture. But the fracture process zone at failure is much smaller than the fracture length. Fracture process zone has a different change rule when the notch angle reaches 120°. The crack propagation length under the average stress criterion decreases with the increase of the notch angle. The theoretical prediction value of the finite fracture mechanics criterion is closer to the experimental results than the average stress criterion regardless of the critical failure load or the crack propagation angle.

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references

Hillerborg A , Modéer M , Petersson P E . Analysis of crack formation and crack growth in concrete by means of fracture mechanics and finite elements [J]. Cement & Concrete Research , 1976 , 6 ( 6 ): 773 - 781 .

徐世烺，赵国藩 . 混凝土结构裂缝扩展的双K断裂准则 [J]. 土木工程学报 , 1992 ( 2 ): 32 - 38 .

Xu Sh L , Zhao G F . Double K-fracture criterion for crack propagation in concrete structures [J]. China Civil Engineering Journal , 1992 ( 2 ) : 32 - 38 . (in Chinese)

Hashin Z . Finite thermoelastic fracture criterion with application to laminate cracking analysis [J]. Journal of the Mechanics and Physics of Solids , 1996 , 44 ( 7 ): 1 129 - 1 145 .

Leguillon D . Strength or toughness: a criterion for crack onset at notch [J]. European Journal of Mechanics A/Solids , 2002 , 21 : 61 - 72

Taylor D , Cornetti P , Pugno N . The fracture mechanics of finite crack extension [J]. Engineering Fracture Mechanics , 2005 , 72 : 1 021 - 1 038

Cornetti P , Pugno N , Carpinteri A , et al . Finite fracture mechanics: a coupled stress and energy failure criterion [J]. Engineering Fracture Mechanics , 2006 , 73 ( 14 ): 2 021 - 2 033 .

Sun Z , Ooi E T , Song C . Finite fracture mechanics analysis using the scaled boundary finite element method [J]. Engineering Fracture Mechanics , 2015 , 134 : 330 - 353 .

童谷生 , 赖泽坤 . 基于有限断裂力学的FRP-混凝土界面粘结强度研究 [J]. 华东交通大学学报 , 2017 , 34 ( 4 ): 13 - 21 .

Tong G Sh , Lai Z K . Research on FRP-concrete interface bond strength based on finite fracture mechanics [J]. Journal of East China Jiaotong University , 2017 , 34 ( 4 ): 13 - 21 . (in Chinese)

Sih G C . Strain-energy-density factor applied to mixed mode crack problems [J]. International Journal of Fracture , 1974 , 10 ( 3 ): 305 - 321 .

Priel E , Bussiba A , Gilad I . Mixed mode failure criteria for brittle elastic V-notched structures [J]. International Journal of Fracture 2007 , 144 : 65 - 247 .

Berto F , Campagnolo A , Lazzarin P . Fatigue strength of severely notched specimens made of Ti⁃6Al⁃4V under multiaxial loading [J]. Fatigue & Fracture of Engineering Materials & Structures , 2015 , 38 ( 5 ): 503 - 517 .

混凝土结构试验方法标准: GB 50152—1992 [S]. 北京：中国建筑科学研究院 , 2012 .

Standard for test methods of concrete structures: GB 50152—1922 [S]. Beijing : China Academy of Building Sciences , 2012 . (in Chinese)

混凝土结构工程施工规范: GB 50666—2011 [S]. 北京：中国建筑工业出版社 , 2011 .

Code for construction of concrete structures: GB 50666—2011 [S]. Beijing : China Construction Industry Press , 2011 . (in Chinese)

李家康 , 王巍 . 高强混凝土的几个基本力学指标 [J]. 工业建筑 , 1997 , 27 ( 8 ): 50 - 54 .

Li J K , Wang W . Several basic mechanical indexes of high strength concrete [J]. Industrial Construction , 1997 , 27 ( 8 ): 50 - 54 . （in Chinese）

施士昇 . 混凝土的抗剪强度、剪切模量和弹性模量 [J]. 土木工程学报 , 1999 , 32 ( 2 ): 47 - 52 .

Shi Sh Sh . Shear strength shear modulus and elastic modulus of concrete [J]. China Civil Engineering Journal , 1999 , 32 ( 2 ): 47 - 52 . （in Chinese）

胡少伟 , 范向前 , 陆俊 . 缝高比对不同强度等级混凝土断裂特性的影响 [J]. 防灾减灾工程学报 , 2013 , 23 ( 2 ): 162 - 168 .

Hu Sh W , Fan X Q , Lu J . Effect of seam height ratio on fracture characteristics of concrete with different strength grades [J]. Journal of Disaster Prevention and Mitigation Engineering , 2013 , 23 ( 2 ): 162 - 168 . （in Chinese）

Saucedo L , Yu R C , Ruiz G . Fully-developed FPZ length in quasi-brittle materials [J]. International Journal of Fracture , 2012 , 178 ( 1/2 ): 97 - 112 .

Shen B , Paulino G H . Direct extraction of cohesive fracture properties from digital image correlation: a hybrid inverse technique [J]. Experimental Mechanics , 2011 , 51 ( 2 ): 143 - 163 .

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