Analysis of fracture characteristics of pervious concrete based on acoustic emission technology
-
摘要: 对含有预制裂缝的透水混凝土试件进行荷载控制的三点弯拉试验,从起裂、断裂以及失稳的机理上研究透水混凝土的断裂力学特性。通过不同加载速率下的三点弯拉试验,探究了不同加载速率对透水混凝土断裂力学特性的影响。同时引入声发射检测技术对透水混凝土往复加载下的开裂过程进行监测。试验结果表明,透水混凝土裂缝扩展规律与声发射振铃累计计数规律相仿,均呈现出三阶段的形式。Abstract: In this paper, load-controlled three-point bending and pulling tests were conducted on precast cracked pervious concrete specimens to study the fracture mechanical properties of pervious concrete in terms of the mechanisms of crack initiation, fracture, and instability. The effect of different loading rates on the fracture mechanical properties of pervious concrete was investigated through three-point bending and pulling tests with different loading rates. The cracking process of pervious concrete under reciprocal loading was also monitored by introducing acoustic emission technology, and the test results showed that the crack expansion pattern of pervious concrete was similar to the cumulative counting pattern of acoustic emission ringing, which both showed a three-stage form.
-
-
[1] 张贤超,尹健,池漪.透水混凝土性能研究综述[J].混凝土,2010(12):47-50. [2] 程娟,杨杨,陈卫忠.透水混凝土配合比设计的研究[J].混凝土,2006(10):81-84. [3] 张朝辉,杨江金,王沁芳,等.透水混凝土制备工艺研究[J].新型建筑材料,2008,35(9):1-4. [4] BRAKE N A, ALLAHDADI H, Adam F. Flexural strength and fracture size effects of pervious concrete[J]. Construction and Building Materials, 2016, 113: 536-543.
[5] ZHOU J, CHENG M, WANG Q, et al.Flexural fatigue behavior of polymer-modified pervious concrete with single sized aggregates[J].Construction and Building Materials,2016,124:897-905.
[6] BAŽANT Z P,JIRÁSEK M.R-curve modeling of rate and size effects in quasibrittle fracture[J].International Journal of Fracture,1993,62(4):355-373.
[7] BAŽANT Z P,PLANAS J.Fracture and size effect in concrete and other quasibrittle materials[M].Boca Raton:CRC Press,1998.
[8] ANDRES N,BRAKE.Prediction of size effect and non-linear crack growth in plain concrete under fatigue loading[J].Engineering Fracture Mechanics,2013,109:169-185.
[9] KOLLURU S V,O'NEIL E F,POPOVICS J S,et al.Crack propagation in flexural fatigue of concrete[J].Journal of Engineering Mechanics,2000,126(9):891-898.
[10] 吴瑾,陈徐东,唐煜,等.基于声发射的钢-连续纤维复合筋混凝土柱受压特性分析[J].无损检测,2021,43(11):18-22,52. [11] 苏怀智,张林海,佟剑杰.混凝土结构损伤声发射检测进展[J].无损检测,2015,37(1):90-95.
计量
- 文章访问数: 5
- HTML全文浏览量: 0
- PDF下载量: 2
下载:
