[1]党发宁,王宝生,李玉涛,等.冲击速度及骨料率对混凝土动强度的影响研究[J].西安建筑科技大学学报(自然科学版),2024,56(01):7-13,22.[doi:10.15986/j.1006-7930.2024.01.002]
　DANG Faning,WANG Baosheng,LI Yutao,et al. Study on influence of impact velocity and aggregate ratio on dynamic strength of concrete [J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2024,56(01):7-13,22.[doi:10.15986/j.1006-7930.2024.01.002]
点击复制

冲击速度及骨料率对混凝土动强度的影响研究()
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:
56
期数:
2024年01期
页码:
7-13,22
栏目:
出版日期:
2024-02-28

文章信息/Info

Title:
Study on influence of impact velocity and aggregate ratio on
dynamic strength of concrete
文章编号:
1006-7930(2024)01-0007-07
作者:
党发宁1; 王宝生2; 李玉涛1; 任劼1; 方建银1
（1.西安理工大学 西北旱区生态水利国家重点实验室，陕西 西安 710048；2.中国电建集团 昆明勘测设计研究院有限公司，云南 昆明 650051）
Author(s):
DANG Faning1; WANG Baosheng2; LI Yutao1; REN Jie1; FANG Jianyin1
（1.State Key Laboratory of EcoHydraulics in Northwest Arid Region of China, Xi′an University of Technology, Xi′an 710048,China; 2.Power China, Kunming Engineering Co., Ltd., Kunming 650051, China）
关键词:
混凝土动强度; 骨料率; 冲击速度; 增加幅度; 霍普金森压杆试验
Keywords:
dynamic strength of concrete; aggregate rate; impact velocity; increase rate;  Hopkinson pressure bar test
分类号:
TU502
DOI:
10.15986/j.1006-7930.2024.01.002
文献标志码:
A
摘要:
混凝土结构抗爆炸冲击能力研究具有很重要的军事防护意义.国内外学者已对混凝土动强度的提高机理进行了大量研究，但大多探讨单个因素对混凝土动强度的影响，缺乏对多因素耦合作用下混凝土动强度规律的研究，并且对混凝土抗压动强度和抗拉动强度间的关系研究也较少.通过霍普金森压杆试验仪的单轴压缩试验和巴西圆盘劈裂试验，测定了不同骨料率和冲击速度下混凝土的抗压动强度和抗拉动强度，再对试验结果进行研究分析，得到混凝土动强度的理论表达式，并将混凝土抗拉抗压动强度进行了对比分析.结果表明：混凝土抗压动强度与混凝土骨料率和冲击速度呈正相关，且随着混凝土骨料率的增大，冲击速度越小，混凝土抗压动强度增加幅度越大，受动载时，混凝土抗压动强度提高幅值大于抗拉动强度提高幅值.
Abstract:
The research on the explosive impact resistance of concrete structure is very important for military protection. Scholars at home and abroad have done a lot of research on the mechanism of improving the dynamic strength of concrete. However, most studies have explored the influence of a single factor on the dynamic strength of concrete, lacking research on the dynamic strength law of concrete under the coupling of multiple factors, and there is also limited research on the relationship between compressive dynamic strength and tensile strength of concrete. Through the uniaxial compression test and Brazilian disc splitting test of Hopkinson pressure bar tester, the compressive and tensile dynamic strength of concrete under different aggregate ratios and impact velocities are measured. Then the theoretical expression of concrete dynamic strength is obtained by studying and analyzing the test results, and the tensile and compressive dynamic strength of concrete is compared. It is found that the compressive dynamic strength of concrete is positively correlated with the aggregate ratio and impact velocity of concrete. With the increase of aggregate ratio, the smaller the impact velocity is, the greater the increase of compressive dynamic strength of concrete is. When subjected to dynamic load, the increase of the compressive dynamic strength of concrete is greater than that of the pull strength.

参考文献/References:

［1］丁卫华,陈厚群,刘少聪,等.基于CT的混凝土动力破坏过程的试验研究［J］.水力发电,2009,35(5):21-23.
DING Weihua, CHEN Houqun, LIU Shaocong, et al. Experimental study on the dynamic failure process of concrete based on CT［J］. Water Power,2009, 35(5): 21-23.
［2］马怀发,王立涛,陈厚群,等.混凝土动态损伤的滞后特性［J］.水利学报,2010,41(6):659-664.
MA Huaifa, WANG Litao, CHEN Houqun, et al. Hysteresis characteristics of dynamic damage to concrete［J］. Journal of Hydraulic Engineering, 2010,41(6): 659-664.
［3］吴胜兴,周继凯,陈厚群.基于微观结构特征的混凝土动态抗拉强度提高机理及其统一模型［J］.水利学报,2010,41(4):419428.
WU Shengxing, ZHOU Jikai, CHEN Houqun. Mechanism of improving dynamic tensile strength of concrete based on microstructure characteristics and its unified model［J］. Journal of Hydraulic Engineering, 2010, 41(4): 419-428.
［4］杜成斌,孙立国,江守燕,等.全级配混凝土梁动强度提高机理研究［J］.河海大学学报(自然科学版),2012,40(3):294-299.
DU Chengbin, SUN Liguo, JIANG Shouyan, et al. Research on the mechanism of improving the dynamic strength of fully graded concrete beams［J］. Journal of Hohai University(Natural Sciences), 2012,40(3): 294-299.
［5］李毅敏,高政国,朱庆庆,等.爆破冲击对早龄期混凝土强度影响的试验研究［J］.爆炸与冲击，2013，33(3):243-248.
LI Yimin, GAO Zhengguo, ZHU Qingqing, et al. Experimental study on the effect of blasting impact on the strength of early age concrete［J］. Explosion and Shock Waves, 2013, 33(3): 243-248.
［6］秦川,武明鑫,张楚汉.混凝土冲击劈拉试验与细观离散元数值仿真［J］.水力发电学报，2013，32(1):196-205.
QIN Chuan, WU Mingxin, ZHANG Chuhan. Concrete impact splitting tensile test and meso discrete element numerical simulation［J］. Journal of Hydroelectric Engineering, 2013, 32(1): 196-205.
［7］刘建忠,孙伟,刘加平,等.多次冲击压缩作用下大掺量粉煤灰超高性能钢纤维混凝土的动态力学行为［J］.河北工业大学学报,2014,43(6):43-46.
LIU Jianzhong, SUN Wei, LIU Jiaping, et al. Dynamic mechanical behavior of ultra high performance steel fiber reinforced concrete with high content of fly ash under multiple impact compression［J］. Journal of Hebei University of Technology, 2014,43(6): 43-46.
［8］李晓琴,陈建飞,陆勇,等.基于局部损伤混凝土模型的FRP混凝土界面有限元分析研究［J］.西安建筑科技大学学报(自然科学版),2015,47(1):62-65.
LI Xiaoqin, CHEN Jianfei, Lu Yong, et al. Finite element analysis of FRP concrete interface based on local damage concrete model［J］. J. of Xi′an Univ. of Arch. & Tech.(Natural Science Edition), 2015,47(1): 62-65.
［9］潘峰,党发宁,焦凯,等.冲击荷载作用下不均匀脆性材料动态弯拉强度提高机制研究［J］.岩石力学与工程学报, 2015, 34(S2): 3948-3955.
PAN Feng, DANG Faning, JIAO Kai, et al. Study on the mechanism of improving dynamic flexural tensile strength of heterogeneous brittle materials under impact load［J］. Chinese Journal of Rock Mechanics and Engineering, 2015,34 (S2): 3948-3955.
［10］HAO Yifei, HAO Hong. Numerical evaluation of the influence of aggregates on concrete compressive strength at high strain rate［J］. International Journal of Protective Structures, 2011,2(2): 177-206.
［11］MU Z C, DANCYGIER A N, ZHANG W, et al. Revisiting the dynamic compressive behavior of concrete-like materials［J］. International Journal of Impact Engineering, 2012, 49: 91-102.
［12］SAVINYKH A S,GARKUSHIN G V,KANEL G I,et al.Method of measurement of the dynamic strength of concrete under explosive loading［J］. International Journal of Fracture, 2018, 209(1/2): 109-115.
［13］PAN Jianwen,ZHONG Wen,WANG Jinting,et al. Size effect on dynamic splitting tensile strength of concrete: Mesoscale modeling［J］. Cement and Concrete Composites, 2022, 128: 104435.
［14］REN Jie, DANG Faning, WANG Huan, et al. Enhancement mechanism of the dynamic strength of concrete based on the energy principle［J］. Materials, 2018, 11(8): 1274-1274.
［15］LEE S, KIM K M, PARK J, et al. Pure rate effect on the concrete compressive strength in the split Hopkinson pressure bar test［J］. International Journal of Impact Engineering, 2018, 113:191-202.
［16］ZHAO F Q, WEN H M. A comment on the maximum dynamic tensile strength of a concretelike material［J］. International Journal of Impact Engineering, 2018, 115: 32-35.
［17］李晓琴,陈前均,陈保淇,等.sss混凝土SHPB试验端面摩擦效应研究［J］.西安建筑科技大学学报(自然科学版), 2018, 50(2): 209-213,241.
LI Xiaoqin, CHEN Qianjun, CHEN Baoqi, et al. Study on end friction effect of SSS concrete in SHPB test［J］. J. of Xi′an Univ. of Arch. & Tech.(Natural Science Edition), 2018, 50(2): 209-213,241.
［18］任劼. 基于能量及细观应力分析的混凝土动强度变化规律研究［D］.西安：西安理工大学,2018.
REN Jie. Research on dynamic strength of concrete based on energy and meso stress analysis［D］. Xi′an: Xi′an University of Technology, 2018.
［19］孙尚鹏,彭刚,程卓群,等.压剪共同作用下混凝土的动态力学性能研究［J］.混凝土与水泥制品，2020(6):13-16,21.
SUN Shangpeng, PENG Gang, CHENG Zhuoqun, et al. Study on dynamic mechanical properties of concrete under combined action of compression and shear［J］. China Concrete and Cement Products, 2020(6): 13-16,21.
［20］程卓群,王乾峰,王普,等.双轴受压混凝土动态力学特性及破坏准则研究［J］.水利水运工程学报,2019(5):101-107.
CHENG Zhuoqun, WANG Qianfeng, WANG Pu, et al. Study on dynamic mechanical properties and failure criteria of concrete under biaxial compression［J］. HydroScience and Engineering, 2019(5): 101-107.
［21］张修文,王乾峰,彭刚,等.水压力下不同孔隙率混凝土的动态力学性能研究［J］.试验力学，2020，35(6):1129-1135.
ZHANG Xiuwen, WANG Qianfeng, PENG Gang, et al. Study on dynamic mechanical properties of concrete with different porosity under water pressure［J］. Journal of Experimental Mechanics, 2020, 35(6): 1129-1135.
［22］王志航,白二雷,许金余,等.聚合物改性碳纤维增强混凝土的动态压缩力学性能［J］.复合材料学报,2023,40(3):1586-1597.
WANG Zhihang, BAI Erlei, XU Jinyu, et al. Dynamic compressive mechanical properties of polymer modified carbon fiber reinforced concrete［J］. Acta Materiae Compositae Sinica,2023,40(3):1586-1597.
［23］白卫峰,李思蕾,管俊峰,等.再生混凝土的单轴压缩动态力学性能试验研究［J/OL］.建筑材料学报.https://kns.cnki.net/kcms/detail/31.1764.TU.20210514.0920.004.html
BAI Weifeng, LI Silei, GUAN Junfeng, et al. Experimental study on dynamic mechanical properties of recycled aggregate concrete under uniaxial compression ［J/OL］. Journal of Building Materials.https://kns.cnki.net/kcms/detail/31.1764.TU.20210514.0920.004.html
［24］巫绪涛,胡俊,谢思发.EPS混凝土的动态劈裂强度和能量耗散［J］.爆炸与冲击,2013,33(4):369-374.
WU Xutao, HU Jun, XIE Sifa. Dynamic splitting strength and energy dissipation of EPS concrete［J］. Explosion and Shock Waves, 2013,33(4): 369-374.
［25］党发宁, 焦凯, 潘峰. 混凝土抗折动强度及其极值研究［J］. 爆炸与冲击, 2016, 36(3): 422-428.
DANG Faning, JIAO Kai, PAN Feng. Study on flexural strength and its extreme value of concrete［J］. Explosion and Shock Waves, 2016, 36(3): 422-428.

备注/Memo

备注/Memo:
收稿日期:2022-05-05修回日期:2023-02-02
基金项目:国家自然科学基金项目(51979225；51679199)
第一作者:党发宁(1962—)，男，教授，博士生导师，主要从事岩土工程数值分析、计算力学等方面的教学与研究工作. E-mail:dangfn@mail.xaut.edu.cn
通信作者:王宝生(1998—)，男，硕士生，主要从事混凝土细观力学特性、水工结构与岩石力学研究. E-mail：199157679@qq.com
更新日期/Last Update: 2024-04-08