结合数字图像处理技术，提出了判断混凝土裂纹的综合算法。
Combining with digital image processing technology, the algorithm of judging concrete crack was proposed.
对于混凝土裂纹图像，算法能够找出裂纹的走向、长度、平均宽度和最大宽度。
The direction, length, average and maximum width of crack can be found out in any concrete crack image.
应用裂纹顶端应力场的精确解，详细讨论了混凝土裂纹顶端的微裂区，并将其与局部解所得的结果进行了比较；进而研究了因应力松驰引起的微裂区的改变。
The microcrack zone concrete is deeply analyzed by using the exact solution of crack tip stress field and is compared to the result from the local solution.
纤维可以使混凝土弯曲并出现头发丝细的裂纹，而不是直接裂出口子。
The fibers allow the concrete to bend and crack in narrow hair-width fractures rather than gaping splits.
出现裂纹以后，混凝土会从周围的空气中吸收水蒸气，变软进而“生长”，从而将裂缝填充起来。
When cracked, the concrete absorbs moisture from surrounding air, then becomes soft and "grows," filling in the crack.
本文研究了带裂纹混凝土梁的应力腐蚀断裂问题。
Stress corrosion cracking problem of concrete beams with crack is studied in this paper.
混凝土结构在硬化早期产生的各类缺陷，包括裂缝、裂纹、裂隙等，是导致工程耐久性破坏的主要内在诱因之一。
Early deficiencies of concrete building, including flaws, cracks, and fractures, have been thought one of principal intrinsic predisposing causes, which lead to structure durability inactivation.
检测或诊断裂纹深度是火灾后混凝土结构受损综合评判的重要依据。
To test or diagnose the depth of crack is the important basis of integrated judgment of damaged concrete structure after fire.
分析结果表明，非线性阶段CT尺度裂纹的扩展和变形对混凝土强度和变形有决定性影响。
It is concluded that the expansion and deformation of cracks in CT scale play decisive roles influencing the strength and deformation of concrete in nonlinear stage.
裂纹、裂缝是混凝土结构常见的缺陷之一。
The cracks are one of defects often occurred on the concrete structures.
现场检测表明，混凝土未出现裂纹，且抗渗性良好，达到了预期效果。
The detecting results show that concrete has no cracks and has excellent impermeability.
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.
多裂纹体的裂缝扩展研究为重力式碾压混凝土坝仿真破坏过程研究提供了条件。
Study on the propagation of cracks in multi-cracked body leads to a good method for studying the actual simulated gradual destroy process of roller compacted concrete dam.
桥面铺装防水混凝土表面不得有麻面、蜂窝和裂纹，施工缝处不得有裂缝。
No honeycombs, pitting surface and cracks may exist on the surface of the waterproofing concrete along the bridge deck pavement, there shall be no cracks at the construction joints.
根据混凝土材料裂纹的分形特性，分析了混凝土的断裂韧度与裂纹带高度之间的变化关系。
Based on the fractal characteristic of concrete material, the relation between fracture toughness and height of crack zone is analyzed.
在诸如装饰混凝土制品的替代物，砌体构件或其它的非结构性的应用中，添加钢纤维并不能起到控制裂纹的作用。
Many typical applications such as where the material is used as a replacement for natural stone, masonry units or other non-structural applications do not benefit from steel to control cracking.
本文介绍了混凝土非结构受力裂纹的类型、产生原因及防治措施，并结合具体的工程进行了分析。
This article briefly introduced the type, causation, prevention and cure measures of non-structure-load cracking in the concrete . furthermore analyzed project cases .
出现裂纹以后，混凝土会从周围的空气中吸收水蒸气，变软进而“生长”，从而将裂缝填充起来。
When cracked, the concrete absorbs moisture from surrounding air, then becomes soft and "grows, " filling in the crack.
为了模拟重力坝在强震作用下的破坏过程，利用扩展有限元框架下的分离裂纹模型描述混凝土中的裂纹扩展。
A discrete crack model based on the extended finite element method (XFEM) was used to describe the nonlinear fracture of concrete gravity DAMS during earthquakes.
在水泥厂工程大体积混凝土施工过程中，可以通过降低水泥水化热和冷却水冷却，控制混凝土内外温差等措施来控制大体积混凝土有害裂纹的产生。
In the mass concrete construction in cement plants, cracks in the concrete may be controlled by reducing the hydration heat and cooling with water to control the internal and external temperature.
压敏产生的原因是导电沥青混凝土试件的压缩邻近效应、微裂纹和石料间的剪切力使部分导电通路错位。
Piezoresistivity of ecac may involve proximity effect, microcrack and the staggered arrangements of conductive pass-ways due to shear strength of aggregates.
揭示了混凝土在准静载下裂纹扩展与电发射脉冲之间的关系。
The relationship between electric emission pluse and the propagation of cracks in concrete under quasi-static loading is exhibited.
数值模拟结果显示混凝土破坏过程实际上就是微裂纹萌生、扩展、贯通，直到宏观裂纹产生导致混凝土失稳断裂的过程。
The numerical simulation results show that the initiation, propagation and linking each other of crack in concrete samples at mesoscale level produce the macro-failure of concrete samples.
从整个试验所得的效果来看，将来应用电沉积技术来钝化甚至愈合混凝土的裂纹是一种行之有效的方法。
The results of whole experiment indicate that applying electro-deposition technology will be an effective method of blunting crack tip and healing crack.
水铣技术具有能把钢筋混凝土中的混凝土清除而又不损伤钢筋和产生裂纹。
Concrete can be cleared from the reinforced concrete while no cracks are caused to the steel bars inside by jet milling technology.
导电混凝土既能用于道路、机场跑道的融冰化雪，又能用于建筑采暖、结构的裂纹监测等方面。
Conductive concrete can apply for both deicing or melt snowing of road, airport runways and for heating, structural monitoring and so on.
导电混凝土既能用于道路、机场跑道的融冰化雪，又能用于建筑采暖、结构的裂纹监测等方面。
Conductive concrete can apply for both deicing or melt snowing of road, airport runways and for heating, structural monitoring and so on.
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