Email Alerts
RSS
Dynamic mechanical properties and failure criteria of concrete under biaxial compression
-
摘要: 利用动静力三轴试验机进行不同加载速率、不同侧向压力下300 mm立方体混凝土的抗压试验，并对所得试验数据进行力学参数分析，在此基础上，建立考虑动态加载速率的K-G破坏准则并对其适用性进行了验证。验证分析结果表明：应变速率越低，侧压对混凝土峰值应力的增益作用越明显；混凝土峰值应变随应变速率增加，大致呈先减后增趋势；峰值应变随侧压的增大而增大, 侧压对峰值应变的影响在应变速率较低时更明显；随应变速率的增大，混凝土弹性模量呈先增后减趋势；侧压对混凝土弹性模量的影响不明显；建立的改进后的K-G准则对动态双轴受压模型描述效果好，而且该模型同时也适用于100和300 mm混凝土立方体的单向和双向应力状态。Abstract: The compression tests of 300 mm concrete cubic specimen under different lateral pressures and different loading rates are carried out by using a dynamic and static triaxial test machine, and the mechanical parameters of the test data are analyzed. On this basis, the K-G failure criterion considering the dynamic loading rate is established and its applicability is verified. The results of validation analysis show that the lower the strain rate is, the more obvious the effect of lateral pressure on the peak stress of concrete is; the peak strain of concrete decreases first and then increases with the increase of the strain rate; the peak strain of concrete increases with the increase of the lateral pressure, and the effect of the lateral pressure on the peak strain is more significant when the strain rate is low; the elastic modulus of concrete increases first and then decreases with the increase of strain rate; and the influences of the lateral pressure on the elastic modulus of concrete is not significant. The improved K-G criterion is more effective in describing the dynamic biaxial compression model, and the model can also be used to verify and analyze the uniaxial and biaxial stress states of 100 mm and 300 mm concrete cubic specimens.
-
Key words:
- concrete /
- strain rate /
- mechanical properties /
- biaxial compressive strength /
- failure criteria
-
图 1 侧压及应变速率对峰值应力的影响
Figure 1. Peak stress influence curves under lateral pressures and strain rates
图 2 侧压及应变速率对峰值应变的影响
Figure 2. Peak strain influence curves under lateral pressures and strain rates
图 3 侧压及应变速率对弹性模量的影响
Figure 3. Influence curves of concrete elastic modulus under lateral pressures and strain rates
图 4 两种K-G准则的动态双轴混凝土受压模型与样本点对比
Figure 4. Comparison between curves given by dynamic biaxial compression model and sample points based on two K-G criteria
表 1 混凝土动态双轴压破坏准则参数
Table 1. Failure criterion parameters of concrete under dynamic biaxial compression
应变速率/s-1 a b R2 10-5 1.012 7.376/7.064 0.999/0.997 10-4 1.041 6.220/6.366 0.992/0.986 10-3 0.951 6.175/5.986 0.985/0.977 注：参数b和R2项中“/”前数值为式(1)拟合值，后为式(4)拟合值。 
下载: 导出CSV
应变速率/s-1 不同侧压下的峰值抗压强度/MPa 0 MPa 3 MPa 6 MPa 9 MPa 10-5 9.84 14.63 15.44 16.14 10-4 10.63 15.48 16.07 16.53 10-3 11.38 16.14 17.01 17.22 10-2 12.32 16.86 17.42 17.83
下载: 导出CSV
-
[1] ABRAMS D A. Effect of rate of application of load on the compressive strength of concrete[J]. ASTM J, 1917, 17(34): 364-377. [2] 孟顺意.混凝土双轴动态试验研究[D].大连: 大连理工大学, 2010. http://cdmd.cnki.com.cn/Article/CDMD-10141-1011021621.htm MENG Shunyi. Double axial dynamic test of concrete[D]. Dalian: Dalian University of Technology, 2010. (in Chinese) http://cdmd.cnki.com.cn/Article/CDMD-10141-1011021621.htm [3] MATSTEIN D. Effect of straining rate on the compressive strength and elastic properties of concrete[J]. ACI J, 1953, 49(4): 729-744. http://cn.bing.com/academic/profile?id=ad83f97d7734e552e88f221c7ee907e1&encoded=0&v=paper_preview&mkt=zh-cn [4] SUN J S, MA L J, DOU Y M, et al. Effect of strain rate on the compressive mechanical properties of concrete. Advanced Materials Research, 2012, 450-451:244-247. doi: 10.4028/www.scientific.net/AMR.450-451.244 [5] TEDESCO J W, POWELL J C, ROSS C A, et al. A strain-rate-dependent concrete material model for ADINA[J]. Computer and Structures, 1997, 64(5/6): 1053-1067. doi: 10.1016-S0045-7949(97)00018-7/ [6] 郑金城, 徐超, 彭刚, 等.预静态加载后的混凝土动态受压特性试验[J].实验力学, 2013, 28(3): 352-359. http://d.old.wanfangdata.com.cn/Periodical/sylx201303012 ZHENG Jincheng, XU Chao, PENG Gang, et al. Experimental study on dynamic compressive behaviors of concrete due to monotonic loading history[J]. Journal of Experimental Mechanics, 2013, 28(3): 352-359. (in Chinese) http://d.old.wanfangdata.com.cn/Periodical/sylx201303012 [7] 吴彬, 彭刚, 周寒清.双轴受压下混凝土动态力学特性试验研究[J].水电能源科学, 2013, 31(5): 100-102, 148. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=sdnykx201305028 WU Bin, PENG Gang, ZHOU Hanqing. Experimental study on dynamic mechanical properties of concrete under biaxial compression[J]. Water Resources and Power, 2013, 31(5): 100-102, 148. (in Chinese) http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=sdnykx201305028 [8] 吕培印, 宋玉普.混凝土动态压缩试验及其本构模型[J].海洋工程, 2002, 20(2): 43-48. doi: 10.3969/j.issn.1005-9865.2002.02.008 LÜ Peiyin, SONG Yupu. Dynamic compression test of concrete and its constitutive model[J]. The Ocean Engineering, 2002, 20(2): 43-48. (in Chinese) doi: 10.3969/j.issn.1005-9865.2002.02.008 [9] 闫东明, 林皋.混凝土单轴动态压缩特性试验研究[J].水科学与工程技术, 2005(6): 8-10. doi: 10.3969/j.issn.1672-9900.2005.06.004 YAN Dongming, LIN Gao. Experimental study on uniaxial dynamic compression properties of concrete[J]. Water Science and Engineering Technology, 2005(6): 8-10. (in Chinese) doi: 10.3969/j.issn.1672-9900.2005.06.004 [10] 彭刚, 王乾峰, 梁春华.有压孔隙水环境中的混凝土动态抗压性能研究[J].土木工程学报, 2015, 48(1): 11-18. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=tmgcxb201501002 PENG Gang, WANG Qianfeng, LIANG Chunhua. Study on dynamic compressive properties of concrete under pore water pressure environment[J]. China Civil Engineering Journal, 2015, 48(1): 11-18. (in Chinese) http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=tmgcxb201501002 [11] 肖洋, 彭刚, 王乾峰, 等.考虑率效应的混凝土压剪强度及破坏准则试验研究[J].水利水运工程学报, 2018(4): 46-53. http://slsygcxb.cnjournals.org/ch/reader/view_abstract.aspx?file_no=201804007&flag=1 XIAO Yang, PENG Gang, WANG Qianfeng, et al. Experimental studies on compressive shear strength and failure criterion of concrete considering rate effect. Hydro-Science and Engineering, 2018(4): 46-53.(in Chinese) http://slsygcxb.cnjournals.org/ch/reader/view_abstract.aspx?file_no=201804007&flag=1 [12] XIAO Yang, PENG Gang, HUANG Chao, et al. Damage evolution study of concrete under joint action of compression and shear. Hydro-Science and Engineering, 2018(2): 112-119. (in Chinese) http://d.old.wanfangdata.com.cn/Periodical/slsykxyj201802015 [13] 王哲.混凝土含损伤的摩尔-库伦强度模型试验研究[J].北京交通大学学报, 2013, 37(4): 84-88. http://d.old.wanfangdata.com.cn/Periodical/bfjtdxxb201304016 WANG Zhe. Experimental study on Mohr-Coulomb model with damage for concrete[J]. Journal of Beijing Jiaotong University, 2013, 37(4): 84-88. (in Chinese) http://d.old.wanfangdata.com.cn/Periodical/bfjtdxxb201304016 [14] 高金良, 梅甫良.基于莫尔强度理论的钢管混凝土轴心受压短柱承载力计算[J].四川建筑科学研究, 2007, 33(5): 126-129. doi: 10.3969/j.issn.1008-1933.2007.05.035 GAO Jinliang, MEI Fuliang. Strength calculation of concrete filled steel tubular short columns under axial compression based on Mohr's strength theory[J]. Sichuan Building Science, 2007, 33(5): 126-129. (in Chinese) doi: 10.3969/j.issn.1008-1933.2007.05.035 [15] 宋玉普, 赵国藩, 彭放, 等.多轴应力下多种混凝土材料的通用破坏准则[J].土木工程学报, 1996, 29(1): 25-32. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK199600815680 SONG Yupu, ZHAO Guofan, PENG Fang, et al. General failure criteria for different concrete materials under multiaxial stresses[J]. China Civil Engineering Journal, 1996, 29(1): 25-32. (in Chinese) http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK199600815680 [16] 过镇海, 王传志.多轴应力下混凝土的强度和破坏准则研究[J].土木工程学报, 1991, 24(3): 1-14. http://www.cnki.com.cn/Article/CJFD1991-TMGC199103000.htm GUO Zhenhai, WANG Chuanzhi. Investigation of strength and failure criterion of concrete under multi-axial stresses[J]. China Civil Engineering Journal, 1991, 24(3): 1-14. (in Chinese) http://www.cnki.com.cn/Article/CJFD1991-TMGC199103000.htm [17] KUPFER H, GERSTLE K H. Behavior of concrete under biaxial stresses[J]. Journal of Engineering Mechanics, 1973, 99(4): 853-866. http://d.old.wanfangdata.com.cn/Periodical/zggdxxxswz-jzytmgc200804005 [18] Comite Euro-International du Beton. Bulletin d'information NO. 213/214, CEB-FIP model code 1990: Concrete structures[S]. Lausanne, Switzerland: Comite Euro-International du Beton, 1993. [19] 闫东明, 林皋, 刘钧玉, 等.定侧压下混凝土的双轴动态抗压强度及破坏模式[J].水利学报, 2006, 37(2): 200-204. doi: 10.3321/j.issn:0559-9350.2006.02.012 YAN Dongming, LIN Gao, LIU Junyu, et al. Dynamic biaxial compressive strength and fracture pattern of concrete with constant confining pressure[J]. Journal of Hydraulic Engineering, 2006, 37(2): 200-204. (in Chinese) doi: 10.3321/j.issn:0559-9350.2006.02.012 -
点击查看大图
图(5) / 表 (3)
计量
- 文章访问数: 372
- HTML全文浏览量: 119
- PDF下载量: 8
- 被引次数: 0
