Abstract: In order to study the failure mechanism of lightweight aggregate concrete structure of plastic fiber, and make an model of the steel fiber reinforced lightweight aggregate concrete by ANSYS finite element analysis software from the two development, using “element birth and death technology” describes the crack phase materials carried out form adopting finite element nume-rical technology to simulate splitting tensile test of plastic steel fiber reinforced lightweight aggregate concrete. Otherwise, the results of comparison of the crack of lightweight aggregate concrete and plastic steel fiber reinforced lightweight aggregate concrete process of evolution, shows that the crack of lightweight aggregate concrete first appeared in the lightweight aggregate, as the load increases, the crack propagates to the interface and mortar, and formed adjacent cracks that near to lightweight aggregate. For plastic steel fiber lightweight aggregate concrete, putting plastic steel fiber into lightweight aggregate concrete changed the crack propagation path, improved the ductility of lightweight aggregate concrete and suppress the propagation of the crack; meanwhile in the splitting tensile test. For plastic steel fiber lightweight aggregate concrete, most of the plastic steel fiber is pulled off, only a small part is extracted. In a word, the simulation results are in good agreement with the experimental results.
1 中国建筑科学研究院.轻骨料混凝土技术规程(JGJ51-2002)[S].北京:中国建筑工业出版社,2002. 2 Hwang Chaolung, Hung Mengfeng. Durability design and perfor-mance of sele-consolidating lightweight concrete[J]. Construction and Building Materials,2005,19(8):619. 3 Niu Jiangang, Li Jingjun, Yin Yaliu, et al. Experimental investigation on mechanical properties and optimal fiber content in plastic steel fiber reinforced lightweight aggregate concrete[J]. Bulletin of the Chinese Ceramic Society,2016,35(1):87(in Chinese). 牛建刚,李京军,尹亚柳,等.塑钢纤维轻骨料混凝土力学性能及最佳纤维掺量试验研究[J].硅酸盐通报,2016,35(1):87. 4 Zhang Zhen. Experimental study on mechanics properties of plastics-steel fiber and steel fiber reinforced light-weight aggregate concrete[D]. Baotou:Inner Mongolia University of Science and Technology,2012(in Chinese). 张镇.塑钢纤维与钢纤维增强轻骨料混凝土力学性能的试验研究[D].包头:内蒙古科技大学,2012. 5 Liu Haifeng, Han Li. Numerical simulation of dynamic mechanical behavior of concrete with two-dimensional random distribution of coarse aggregate[J]. Chinese Journal of High Pressure Physics,2016,30(3):191(in Chinese). 刘海峰,韩莉.二维骨料随机分布混凝土的动态力学性能数值模拟[J].高压物理学报,2016,30(3):191. 6 Li Ge, Ai Zhidan, Li Yan. Numerical simulation for random embarking of aggregate and fiber with two-dimensional meso-structure of fiber concrete[J]. Journal of Inner Mongolia Agricultural University (Natural Science Edition),2015,36(6):101(in Chinese). 李革,艾智丹,李彦.纤维混凝土二维细观结构中骨料与纤维随机投放的数值模拟[J].内蒙古农业大学学报(自然科学版),2015,36(6):101. 7 Leite J P B, Slowik V, Mihashi H. Computer simulation of fracture processes of concrete using mesolevel models of lattice structures[J]. Cement and Concrete Research,2004,34(6):1025. 8 Nagai Kohei, Sato Yasuhiko, Ueda Tamon. Mesoscopic simulation of failure of mortar and concrete by 2D RBSM[J]. Journal of Advanced Concrete Technology,2004,2(3):359. 9 Zhang Jugong. Numerical simulation of failure process and size effect of random short fiber reinforced concrete[J]. Highway Engineering,2015,40(2):87(in Chinese). 张巨功.短纤维增强混凝土破坏过程及其尺寸效应数值模拟[J].公路工程,2015,40(2):87. 10 Fuller W B, Thompson S E. The laws of proportioning concrete[J]. Transactions of the American Society of Civil Engineers,1907,59(1):14. 11 Walaraven J C, Reinhardt H W. Theory and experiments on the mechanical behavior of cracks in plain and relnforced concrete subjected to shear loading[J]. Heron,1981,26(1A):26. 12 Yang Kerong, Peng Gang, Bai Wei. Numerical simulation of dehiscence of concrete based on meso-level by ANSYS[J]. Concrete,2009(2):8(in Chinese). 杨克荣,彭刚,柏巍.基于ANSYS的混凝土微观层次开裂演化数值模拟[J].混凝土,2009(2):8. 13 Song Xiaoyuan, Shen Xiangdong, Li Hongyun, et al. Study on early-age elastic modulus of cement mortar with mineral powder dosage[J]. Bulletin of the Chinese Ceramic Society,2013,32(10):2138(in Chinese). 宋小园,申向东,李红云,等.掺矿渣粉水泥砂浆早期弹性模量的研究[J].硅酸盐通报,2013,32(10):2138. 14 Liu Xunbo, Li Pingjiang, Ji Yiqi. The effective elastic modulus of ceramsite and its predication[J]. Concrete,2005(3):35(in Chinese). 刘巽伯,李平江,计亦奇.陶粒有效弹性模量及其预估[J].混凝土,2005(3):35. 15 Li Shuguang, Li Qingbin. Method of meshing ITZ structure in 3D meso-level finite element analysis for concrete[J]. Finite Elements in Analysis and Design,2015,93:96. 16 Dang Faning, Tian Wei, Han Wentao. 3-D numerical simulation of concrete failure process and CT verification[J]. Journal of Water Resources,2012,37(6):674(in Chinese). 党发宁,田威,韩文涛.混凝土破裂过程三维数值模拟及CT验证[J].水利学报,2012,37(6):674. 17 Leite J P B. Computer simulation of fracture processes of concrete using mesolevel models of lattice structures[J]. Cement and Concrete Research,2004,34:1025. 18 Yu Jing, Li Xingfeng, Li Hongquan. comparative research of size effect on compression strength of normal concrete and light aggregate concrete[J]. Building Technique Development,2005,32(7):58(in Chinese). 余菁,李兴峰,李洪泉.普通混凝土和轻骨料混凝土强度尺寸效应的对比研究[J].建筑技术开发,2005,32(7):58. 19 Wang Licheng, Xing Likun, Song Yupu. Mesoscale modeling on size effect of splitting tensile strength and flexural compressive strength of concrete[J]. Engineering Mechanics,2014,31(10):69(in Chinese). 王立成,邢立坤,宋玉普.混凝土劈裂抗拉强度和弯曲抗压强度尺寸效应的细观数值分析[J].工程力学,2014,31(10):69.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2018, Vol. 32 
