摘要
为探究加入纤维对水泥土疲劳性能的影响,采用电液伺服加载系统对玄武岩纤维水泥土试件开展单轴压缩疲劳试验。借助疲劳损伤实时监测系统及动态信号测试分析系统,从损伤参数A值的变化及试件轴向不可逆变形两方面分别描述了玄武岩纤维水泥土的疲劳损伤三阶段变化规律,分析结果发现两者变化规律基本对应;通过对比分析不同配比玄武岩纤维水泥土疲劳损伤各阶段的变化规律,发现玄武岩纤维对水泥土疲劳特性的改善主要是通过限制疲劳裂纹的形成和扩展,从而提高水泥土的疲劳寿命;水泥土的疲劳寿命与玄武岩纤维掺量在研究范围内近似呈正相关关系,其具体的关系式符合三参数二次函数模型。
In order to investigate the effect of fibers addition on the fatigue properties of soil cement, the uniaxial compression fatigue test of basalt fiber cement soil specimens was carried out by electro-hydraulic servo loading system. With the help of real time fatigue damage monitoring system and dynamic signal test and analysis system, the three-stage change law of the fatigue damage of basalt fiber cement soil are described from two aspects: the variation of damage parameter A and the axial irreversible deformation of specimen, the results show this two change laws basically correspond to each other. By comparing and analyzing the variation of different proportion of basalt fiber in each stage of cement-soil fatigue damage, we found that the improvement of fatigue characteristics of cement-soil by basalt fiber was mainly through limiting the formation and propagation of fatigue cracks to improve the fatigue life of cement-soil. The fatigue life of cement-soil is approximately positively correlated with the content of basalt fiber in the research range, the concrete relation accords with the three-parameter quadratic function model.
作者
陈峰
童生豪
CHEN Feng;TONG Sheng-hao(College of Engineering/Fujian Jiangxia University, Fuzhou 35108, China;College of Environment and Resources/Fuzhou University, Fuzhou 350116, China)
出处
《山东农业大学学报（自然科学版）》
北大核心
2019年第5期815-820,共6页
Journal of Shandong Agricultural University：Natural Science Edition
基金
国家自然科学基金(51578153)
福建省自然科学基金(2018J01631)
福建省省属高校专项科研项目(JK2016045)
