测试混凝土断裂时的声发射事件数；
The relationship between fracture properties of concrete and AE hits was analyzed.
研究了几种矿物掺合料对高强混凝土断裂脆性的影响。
In this article the effect is discussed that several mineral admixtures have on the fracture brittleness of the high strength concrete.
本文方法同样适用于其它混凝土断裂模型的断裂参数的计算。
The method is also valid to be used for fracture parameter computations of other fracture criterions of concrete.
岩土破损力学是不同于岩土断裂力学和岩土损伤力学的新理论。
Breakage mechanics is a new theory different from fracture mechanics and damage mechanics.
本文从填土断裂破坏的现象出发，介绍了断裂力学的基本概念。
According to the phenomena of the fracture of compacted soils, the fundamental concepts of fracture mechanics are introduced.
本文从填土断裂破坏的现象出发，介绍了断裂力学的基本概念。
According to the phenomena of the fracture of compacted soils, the fundamental concepts of fracture mechanics are introduced. It shows that these concepts can also be applied to the compacted soils.
通过试验得出复掺矿物掺合料是改善混凝土断裂脆性的有效途径之一。
The addition of mineral admixtures is one of the effective approaches, which can improve fracture brittleness of high compressive strength concrete.
李洪升、朱元林，冻土断裂力学及其应用，北京：海洋出版社，2002。
Li Hongsheng, Zhu Yuanlin, Fracture Mechanics of Frozen Soil and Its Application, China Ocean Press, 2002.
采用投影覆盖法结合激光三角测试技术，直接测定了混凝土断裂表面分维值。
The fractal dimension of fracture surface was measured directly by using projective covering method and laser triangulation technique.
本文最后研究了聚丙烯纤维的体积含量对大掺量粉煤灰混凝土断裂参数的影响。
Finally, the paper investigates how the volume content of polypropylene fibers affects the fracture parameters of high-volume fly ash concrete.
结果表明：混凝土断裂是一个复杂的不规则过程，存在明显的亚临界扩展现象。
It is shown that the fracture of concrete behaved complicatedly and irregularly, which underwent explicitly a subcritical crack growth prior to the unstable crack propagation.
提出集料在高强混凝土断裂过程的两种机理，并采用能量观点分析这两种机理；
The paper advances two mechanisms about effect of aggregate during fracture of high strength concrete and adopts the point of energy to analysis of the mechanisms.
混凝土断裂能G _ F是材料的一个基本性能，表示扩展单位裂缝面所需要的能量。
The fracture energy GF of concrete is one basic material characteristic, representing the energy necessary to create a unit area of fracture surface.
并以此为基础，通过引入局部断裂能的概念，推导出与尺寸无关的混凝土断裂能表达式。
Based on the explanation, a model for size-independent fracture energy is provided by introducing a concept of local fracture energy.
混凝土裂缝端部断裂过程区的粘聚力分布是导致混凝土断裂呈现非线性特性的重要原因。
Nonlinear fracture behaviors of concrete materials are mainly caused by the cohesive stress along the fracture process zone.
采用混凝土断裂能试验研究了使用磨细矿渣和硅灰配制的高强度高性能混凝土的断裂脆性。
Fracture energy of concrete was measured for studying the fracture brittleness of the high performance concrete mixed ground granulated blastfurnace slag (GGBFS) and silica fume.
再生混凝土断裂韧度随龄期的增加而提高，提高的幅度与天然骨料混凝土基本一致，其趋势在增加；
Along with the increase of age, its fracture toughness grows, and the elevated range is in accordance with the natural aggregate concrete basically;
介绍了对混凝土断裂面进行分形研究的重要性、分形理论及混凝土断裂面分析中几种主要的分数维测量方法；
The importance of study on the fracture surfaces, the fractal theory and the measurements of fractal dimensions are introduced.
研究表明，神经网络方法由于综合考虑了更多的混凝土断裂能影响因素，而且能够实现非线性关系，所以具有较高的预测精度。
The research indicates that Neural Network has high accuracy because it is able to realize nonlinear relations and because more factors influencing fracture energy are taken into account.
对混凝土断裂时的电磁发射现象进行了理论研究，研究表明：混凝土断裂电磁发射是由于裂纹尖端电荷随着裂纹的加速扩展运动而产生。
A new idea that the distribution movement of electric charge in the cr ack tip end being associated with concrete fracture propagation produce electromagnetic emission is brought up.
对混凝土断裂时的电磁发射现象进行了理论研究，研究表明：混凝土断裂电磁发射是由于裂纹尖端电荷随着裂纹的加速扩展运动而产生。
A new idea that the distribution movement of electric charge in the cr ack tip end being associated with concrete fracture propagation produce electromagnetic emission is brought up.
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