Abstract：In order to explore the influence of steel fiber content ( volume rate 0 %, 0.8 %, 1.5 % ) on the basic mechanical properties of C30 recycled coarse aggregate concrete ( mass fraction replacement rate 0 %, 100 % ), the damage evolution law of steel fiber recycled coarse aggregate concrete during axial compression was described by combining acoustic emission characteristic parameters and stress-strain curve. The test results show that through the analysis of acoustic emission damage location, impact count and energy count, the dynamic monitoring of the whole process of axial compression failure of steel fiber recycled coarse aggregate concrete from cumulative damage to micro-crack evolution and then to macro-crack propagation can be realized. The concentrated location of damage points in the loading process of recycled coarse aggregate concrete and ordinary concrete specimens with different steel fiber contents is consistent with the final failure location of the specimens. The concrete damage model based on acoustic emission cumulative impact count can be used to analyze the damage evolution law of steel fiber recycled coarse aggregate concrete.
崔正龙，费海超，孙万吉，李正元. 钢纤维再生粗骨料混凝土受压声发射特性与损伤演化[J]. 振动与冲击, 2023, 42(5): 136-142.
CUI Zhenglong, FEI Haichao, SUN Wanji, LI Zhengyuan. Acoustic emission characteristics and damage evolution of steel fiber recycled coarse aggregate concrete under compression. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(5): 136-142.
[1] 顾金土，陈云，苏杰，等. 建筑垃圾资源化生产线的设计和实践[J]. 新型建筑材料，2021, 48(04): 36-39.
GU Jintu, CHEN Yun, SU Jie, et al. Design and practice of construction waste recycling produc-tion line [J]．New Building Materials, 2021, 48(04): 36-39(in Chinese).
[2] 王晓丽，李秋义，陈帅超，等. 工业固体废弃物在新型建材领域中的应用研究与展望[J]. 硅酸盐通报，2019, 38(11): 3456-3464.
WANG Xiaoli, LI Qiuyi, CHEN Shuaichao, et al. Application research and prospect of industrial solid waste of new building materials [J]. Bulletin of The Chinese Ceramic Society, 2019, 38(11): 3456-3464(in Chinese).
[3] ZHU P H, HAO Y L, LIU H, et al. Durability evaluation of three generations of 100% repeated-ly recycled coarse aggregate concrete [J]. Con-struction and Building Materials, 2019, 210: 442-450.
[4] XIAO Q H, CAO Z Y, GUAN X, et al. Damage to recycled concrete with different aggregate substi-tution rates from the coupled action of freeze thaw cycles and sulfate attack [J]. Construction and Building Materials, 2019, 221: 74-83.
[5] KIM Y, HANIF A, USMAN M, et al. Influence of bonded mortar of recycled concrete aggregates on interfacial characteristics-porosity assessment based on pore segmentation from backscattered electron image analysis[J]. Construction and Building Materials, 2019, 212: 149-163.
[6] LEI B, LI W G, TANG Z, et al. Durability of re-cycled aggregate concrete under coupling me-chanical loading and freeze-thaw cycle in salt so-lution[J]. Construction and Building Materials, 2018, 163: 840-849.
[7] 阳能军, 姚春江, 袁晓静, 等. 基于声发射的材料损伤检测技术, 北京航空航天大学出版社, 2016.
YANG Nengjun, YAO Chunjiang, YUAN Xiaojing, et al. Material damage detection technology based on acoustic emission, Beijing University of Aeronautics and Astronautics Press, 2016 (in Chinese).
[8] 李东生, 杨伟, 喻言. 土木工程结构损伤声发射监测及评定—理论、方法与应用, 科学出版社, 2017.
LI Dongsheng, YANG Wei, YU Yan. Acoustic emission monitoring and assessment of structural damage in Civil Engineering theory, method and Application, Science Press, 2017 (in Chinese).
[9] 王春来，徐必根，李庶林，等.单轴受压状态下钢纤维混凝土损伤本构模型研究［J］.岩土力学，2006，28(1):151-154．
WANG Chunlai,XU Nigen,LI Shulin,et al.Study on a constitutive model of SFRC under uniaxial compression[J]. Rock and Soil Mechanics,2006,28(1):151-154. (in Chinese).
[10] 薛云亮，李庶林，林峰，等.考虑损伤阀值影响的钢纤维混凝土损伤本构模型研究［J］.岩土力学，2009，31(7):1987-1992.
XUE Yunliang LI Shulin,LIN Feng,et al.Study of dangmge constitutive model of SFRC of damage threshold[J]. Rock and Soil Mechanics,2009,31(7):1987-1992. (in Chinese).
[11] 贺一轩，杜红秀.混掺纤维 RPC 高温后剩余抗压强度及超声检测[J].玻璃钢/复合材料,2019( 8) :78-81.
HE Y X，DU H X.Residual compressive strength and ultrasonic testing after mixing fiber rpc at elevated temperature[J]. Fiber Reinforced Plastics/Composites，2019( 8) : 78-81 ( in Chinese).
[12] Chi Y，Xu L H，Yu H S.Constitutive modeling of steel polypropylene hybrid fiber reinforced concrete using a non associated plasticity and its numerical implementation［J］.Composite Structures，2014,111: 497-509.
[13] 张亚梅. 土木工程材料, 东南大学出版社, 2013.
ZHANG Yamei. Civil Engineering Materials, Southeast University Press, 2013 (in Chinese).
[14] Lemaitre J, Krajcinovic D. Continuum damage mechanics theory and applications[M]. New York: Springer, 1987.
[15] Heiple CR, Carpenter SH, Carr MJ. Acoustic emission from dislocation motion in precipitation strengthened alloys[J]. Met Sci, 1981(15): 587-589.
[16]Wadley HNG,Scruby CB,Speake JH.Acoustic emission for physical examination of metals[J]. Int Met Rev,1980(25):41–64.
