| 水泥土疲劳损伤特性的超声波速试验研究 |
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| 引用本文： | 张敏霞,徐平,简文彬. 水泥土疲劳损伤特性的超声波速试验研究[J]. 工业建筑, 2011, 0(Z1): 728-730,733 |
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| 作者姓名： | 张敏霞 徐平 简文彬 |
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| 作者单位： | 河南理工大学土木工程学院;福州大学环境与资源学院; |
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| 摘 要： | 对在单轴动荷载作用下水泥土超声波波速的变化规律进行试验研究,试验过程中发现穿透水泥土试件自由面的波速随着荷载作用次数的增加发生了明显的衰减。基于超声波速定义的水泥土损伤变量,并建立了水泥土疲劳累积损伤的演化方程。该方程表明水泥土的疲劳损伤在动荷载作用下发生了明显的3阶段变化,即波速的初始迅速衰减、稳定衰减与临近破坏的急速衰减3个阶段。最后提出在实际工程中运用超声波无损检测法是评价水泥土疲劳损伤与结构耐久性的一般方法。
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| 关 键 词： | 损伤力学 水泥土 动荷载 疲劳损伤 超声波速 |
EXPERIMENTAL STUDY ON THE ULTRASONIC WAVE VELOCITY OF THE CEMENTED SOIL FATIGUE LIFE UNDER DYNAMIC LOAD |
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| Zhang Minxia Xu Ping Jian Wenbin. EXPERIMENTAL STUDY ON THE ULTRASONIC WAVE VELOCITY OF THE CEMENTED SOIL FATIGUE LIFE UNDER DYNAMIC LOAD[J]. Industrial Construction, 2011, 0(Z1): 728-730,733 |
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| Authors: | Zhang Minxia Xu Ping Jian Wenbin |
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| Affiliation: | Zhang Minxia1 Xu Ping1 Jian Wenbin2(1The College of Civil Engineering of Henan Polytechnic University,Jiaozuo 454000,China,(2 College of Environment and Resources of Fuzhou University,Fuzhou 350002,China) |
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| Abstract: | The ultrasonic wave velocity of the cemented soil fatigue damage under dynamic load is studied in the paper.The results shows that the attenuation of the ultrasonic wave velocity through the cemented soil samples free surface occurs obviously as the cycles of the dynamic load increase,which can be divided into three phases obviously,showing the initial rapid decay,stability decay and rapid damage close to the destruction of the sample life.Based on the ultrasonic wave velocity,the damage variable is defined... |
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| Keywords: | damage mechanics cemented soil dynamic load fatigue damage ultrasonic wave velocity |
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