|Table of Contents|

Fracture characteristics and parametric analysis of high strength concrete(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2024年03期
Page:
34-42
Research Field:
建筑材料
Publishing date:

Info

Title:
Fracture characteristics and parametric analysis of high strength concrete
Author(s):
LONG Qiao1;  CHEN Hongniao1; 2;  LIU Dengkai1;  SHEN Jie1;  XU Yingjie1
(1. Research Center of Space Structures, Guizhou University, Guiyang 550025, Guizhou, China; 2. Key Laboratory of Structural Engineering of Guizhou Province, Guizhou University, Guiyang 550025, Guizhou, China)
Keywords:
high strength concrete;  fracture characteristic;  numerical analysis;  three-point bending beam
PACS:
TU528
DOI:
10.19815/j.jace.2022.05039
Abstract:
In order to investigate the fracture characteristics of high strength concrete(HSC), three-point bending test was performed on HSC beams with centre-notched,and the extended finite element method(XFEM)was employed to simulate the beams.The horizontal strain fields of the beams in different loading stages were obtained by digital image correlation technique(DIC). In addition, an analysis of the effect of the seam height ratio a0/D and the span S on the fracture characteristics was conducted with XFEM models. The results show that the simulated load-crack opening displacement (P-s) curve is basically consistent with the experimental results in the loading stage, but smaller than the experimental results in the unloading stage. The simulated critical effective crack length ac, initiation load Pini, peak load Pun, crack opening displacement under peak loads, initiation fracture toughness KiniIC, and instability fracture toughness KunIC are roughly in accordance with the experimental results. Therefore, the P-s curve and fracture parameters measured by XFEM are consistent with those obtained by the test respectively, and the XFEM models can preferably simulate the fracture behavior of HSC. During the experiment process, the crack path is irregular, while in the numerical simulation, the cracks basically extend in a straight line. As a0/D increases, the initiation load Pini, peak load Pmax and instability fracture toughness KunIC decrease, and the initiation instability toughness KiniIC basically unchanges. With the increase of S, the initiation load Pini and peak load Pmax decrease and the instability fracture toughness KunIC increase, while the initiation instability toughness KiniIC basically stays unchanged.

References:

[1] 罗云伟.高强混凝土在超高层建筑中的应用[J].科技创新与应用,2021,11(19):158-160.
LUO Yunwei.Application of high strength concrete in super high-rise building[J].Technology Innovation and Application,2021,11(19):158-160.
[2]王立虎.建筑施工中高强混凝土的应用分析[J].低碳世界,2021,11(7):114-115.
WANG Lihu.Application analysis of high strength concrete in building construction[J].Low Carbon World,2021,11(7):114-115.
[3]檀姊静,檀妹静.高强混凝土在公路桥梁工程中的运用[J].工业建筑,2021,51(7):251.
TAN Zijing,TAN Meijing.Application of high strength concrete in highway bridge engineering[J].Industrial Construction,2021,51(7):251.
[4]邓宗才.高强混凝土的断裂韧度[J].混凝土,1995(2):3-5,30.
DENG Zongcai.Fracture toughness of high strength concrete[J].Concrete,1995(2):3-5,30.
[5]GIACCIO G,ROCCO C.高强混凝土的断裂能(GF)[J].四川建材,1994,20(4):37-41,44.
GIACCIO G,ROCCO C.Fracture energy of high strength concrete(GF)[J].Sichuan Building Materials,1994,20(4):37-41,44.
[6]徐道远,符晓陵,祖全民.混凝土三点弯曲梁断裂能的测试研究[J].河海大学学报(自然科学版),1989,17(2):50-56.
XU Daoyuan,FU Xiaoling,ZU Quanmin.Fracture energy of three-point bending concrete beams[J].Journal of Hohai University(Natural Sciences),1989,17(2):50-56.
[7]张国强,李瑞鸽.高强混凝土的断裂性能研究[J].混凝土,2008(1):11-13,16.
ZHANG Guoqiang,LI Ruige.Fracture performance of high strength concrete[J].Concrete,2008(1):11-13,16.
[8]孙晓华,刘 阳.玄武岩纤维与粉煤灰改性高强混凝土力学性能研究[J].当代化工,2021,50(11):2545-2548.
SUN Xiaohua,LIU Yang.Research on mechanical properties of high-strength concrete modified by basalt fiber and fly ash[J].Contemporary Chemical Industry,2021,50(11):2545-2548.
[9]王 林.骨料及水泥石强度对混凝土断裂性能的影响[D].北京:清华大学,2004.
WANG Lin.Effect of aggregate and cement matrix strength on the fracture properties of concrete[D].Beijing:Tsinghua University,2004.
[10]SENER S.Size effect tests of high strength concrete[J].Journal of Materials in Civil Engineering,1997,9(1):46-48.
[11]DEL VISO J R,CARMONA J R,RUIZ G.Shape and size effects on the compressive strength of high-strength concrete[J].Cement and Concrete Research,2008,38(3):386-395.
[12]胡少伟,安 康.不同尺寸混凝土三点弯曲梁试件断裂过程试验研究[J].水利水电技术,2015,46(6):120-125.
HU Shaowei,AN Kang.Experimental study on fracture process of various size specimens of three-point bending concrete beam[J].Water Resources and Hydropower Engineering,2015,46(6):120-125.
[13]徐世烺,赵国藩.光弹性贴片法研究混凝土裂缝扩展过程[J].水力发电学报,1991,10(3):8-18.
XU Shilang,ZHAO Guofan.The investigation on the propagation process of a crack in concrete by means of photoelastic coating[J].Journal of Hydroelectric Engineering,1991,10(3):8-18.
[14]WU Z M,RONG H,ZHENG J J,et al.An experimental investigation on the FPZ properties in concrete using digital image correlation technique[J].Engineering Fracture Mechanics,2011,78(17):2978-2990.
[15]MELENK J.The partition of unity finite element method:basic theory and applications[J].Computer Methods in Applied Mechanics and Engineering,1996,139(1/2/3/4):289-314.
[16]CHEN H H N,SU R K L,FOK S L,et al.Fracture behavior of nuclear graphite under three-point bending tests[J].Engineering Fracture Mechanics,2017,186:143-157.
[17]张晓东,丁 勇,任旭春.混凝土裂纹扩展过程模拟的扩展有限元法研究[J].工程力学,2013,30(7):14-21,27.
ZHANG Xiaodong,DING Yong,REN Xuchun.Simulation of the concrete crack propagation process with the extended finite element method[J].Engineering Mechanics,2013,30(7):14-21,27.
[18]刘 春,陈红鸟,赵艳兵,等.三点弯曲下混凝土断裂性能参数试验研究[J].硅酸盐通报,2016,35(12):4191-4200,4211.
LIU Chun,CHEN Hongniao,ZHAO Yanbing,et al.Experimental study on fracture properties of concrete based on three point bending tests[J].Bulletin of the Chinese Ceramic Society,2016,35(12):4191-4200,4211.
[19]唐宇翔.准脆性材料断裂过程区特性的试验和数值模拟研究[D].贵阳:贵州大学,2020.
TANG Yuxiang.Experimental and numerical simulation study on characteristics of fracture process zone of quasi-brittle materials[D].Guiyang:Guizhou University,2020.
[20]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,1992,25(2):32-38.
XU Shilang,ZHAO Guofan.A double-K fracture criterion for the crack propagation in concrete structures[J].China Civil Engineering Journal,1992,25(2):32-38.
[21]徐世烺.混凝土断裂力学[M].北京:科学出版社,2011.
XU Shilang.Fracture mechanics of concrete[M].Beijing:Science Press,2011.
[22]王璀瑾,吴智敏.超高强混凝土双K断裂参数及断裂能试验研究[J].水力发电学报,2017,36(8):86-93.
WANG Cuijin,WU Zhimin.Experimental investigation on double-K fracture parameters and fracture energy for ultra-high strength concrete[J].Journal of Hydroelectric Engineering,2017,36(8):86-93.
[23]王德强,陈红鸟,马克俭,等.往复荷载下混凝土断裂力学特性研究[J].应用力学学报,2020,37(6):2317-2324,2689.
WANG Deqiang,CHEN Hongniao,MA Kejian,et al.Investigations on fracture properties of concrete under cyclic loading[J].Chinese Journal of Applied Mechanics,2020,37(6):2317-2324,2689.

Memo

Memo:
-
Last Update: 2024-05-20