冲击压缩载荷下大尺寸混凝土力学响应的数值模拟
PDF下载 (335)陈博斐,邱 欣,王 甲,陈江瑛*.冲击压缩载荷下大尺寸混凝土力学响应的数值模拟[J].宁波大学学报(理工版),2017,30(1):73-76.DOI:
CHEN Bo-fei,QIU Xin,WANG Jia,CHEN Jiang-ying*.. Numerical simulation on mechanical response of concrete subjected to impact compressive loading[J].Journal of Ningbo University(Natural Science & Engineering Edition),2017,30(1):73-76.DOI:
| Title: | . Numerical simulation on mechanical response of concrete subjected to impact compressive loading |
| 作者: | 陈博斐, 邱 欣, 王 甲, 陈江瑛* |
| Author(s): | CHEN Bo-fei, QIU Xin, WANG Jia, CHEN Jiang-ying* |
| 关键词: | 大尺寸混凝土; SHPB束杆; 数值模拟; 应力波; 破坏形貌 |
| Keywords: | large-size concrete; bundled Hopkinson pressure bar; numerical simulation; stress wave; damage appearance |
| 分类号: | O347.3 |
| 文献标识码: | A |
| 摘要: | 利用Ansys/Ls-dyna有限元软件模拟打击气压为0.6、0.8、1.2MPa下大尺寸混凝土的SHPB束杆试验. 试验结果表明, 模拟得到的冲击试验过程中束杆传播的入射、反射及透射应力波信号与实测结果比较, 波形总体吻合较好, 入射波偏差很小, 反射波和透射波差异略大; 打击气压越大, 试样破损速度越快. 数值模拟给出了不同打击气压下大尺寸混凝土破坏形貌变化的规律. |
| Abstract: | The numerical simulations of the bundled Hopkinson pressure bar tests of large-size concrete with 0.6, 0.8 and 1.2 MPa fire pressures are studied using the finite element software of Ansys/Ls-dyna in this paper. The incident stress waves, reflected stress waves and transmitted stress waves are obtained in the bundled bars of experiments and simulations during the process of impact, and the error analysis is consequently made. The results show that the waves of simulation are in good agreement with the experimental data. The deviation of incident stress waves is small enough. This study provides the explanation for the trivial difference of the reflected stress waves and the transmitted stress waves. The conclusion from this study is that the larger the blow air pressure, the faster the damage speed. The trends are also analyzed of the damage appearance changes of large-size concrete subjected to different fire pressures |
| 参考文献 /References: | [1] 胡时胜, 王道荣, 刘剑飞. 混凝土材料动态力学性能的实验研究[J]. 工程力学, 2001, 18(5):115-118. [2] 陈德兴, 胡时胜, 张守保, 等. 大尺寸Hopkinson压杆及其应用[J]. 试验力学, 2005, 20(3):398-402. [3] ZHU J, HU S, WANG L. An analysis of stress uniformity for concrete-like specimens during SHPB tests[J]. Intern- ational Journal of Impact Engineering, 2009, 36(1):61-72. [4] ALBERTINI C, CADONI E, LABIBES K. Impact fracture process and mechanical properties of plain concrete by means of an Hopkinson bar bundle[J]. Le Journal De Physique IV, 1997, 7(C3):915-920. [5] 贾彬, 李正良, 陶俊林, 等. 混凝土SHPB试验数值模拟研究[J]. 固体力学学报, 2010(S1):216-222. [6] 巫绪涛, 孙善飞, 李和平. 用HJC本构模型模拟混凝土SHPB实验[J]. 爆炸与冲击, 2009(2):137-142. [7] ZHU W C, BAI Y, LI X B, et al. Numerical simulation on rock failure under combined static and dynamic loading during SHPB tests[J]. International Journal of Impact Engineering, 2012, 49(2):142-157. [8] 张圆. 基于Hopkinson束杆技术的混凝土动态实验方法研究[D]. 宁波: 宁波大学, 2009. [9] HOLQMUIST T J, JOHNSON G R. A computational constitutive model for concrete subjected to large strains, high strain rate, and high pressures[C]//The 14th Inter- national Symposium on Ballistics. Quebec, Canada, 1993: 591-600. [10] 白金泽. LS-DYNA3D理论基础与实例分析[M]. 北京:科学出版社, 2005:101-103. |
| 备注/Memo: | 收稿日期: 2016?01?06. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 国家自然科学基金（10972109, 11272165）. 第一作者: 陈博斐（1993－）, 男, 江西于都人, 在读硕士研究生, 主要研究方向: 冲击动力学. E-mail: chenbofei912@163.com *通信作者: 陈江瑛（1964－）, 女, 浙江宁波人, 博士/教授, 主要研究方向: 冲击动力学. E-mail: chenjiangying@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
