| 1. | The forming and distribution of the structural fractures are related to the local tectonics ( e . g . the rifting and the folding )
构造裂缝的形成和分布与局部构造作用(断层、褶皱作用)有关。 |
| 2. | The formation of daqu crackes could be divided into pre - existing crackes , gas - producing crackes , and the crackes formed during storage
大曲裂缝的形成有原生裂缝、气生裂缝和在贮存过程中形成的裂缝之分。 |
| 3. | If we could grasp the basic mechanical behavior of mass concrete and the mechanism of crack generation , crack can be avoided
只有充分掌握大体积混凝土的力学性能和裂缝的形成机理，才能更好地防止裂缝的产生。 |
| 4. | Usually , there are many cracks in dam body during construction period and operating period . how to simulate process of cracks " formation and development reasonably and effectively is a problem
拱坝在施工期和运行期经常会出现裂缝，如何合理、有效地模拟裂缝的形成和发展过程是一大难题。 |
| 5. | The paper makes use of a lot of data coming from practice to train neural net , then it calculates and predicts stress intensity factor , what ' s more , that simulates crack ' s forming
本文利用从实践中收集来的数据训练神经网络，对应力强度因子进行计算与预测，并且利用三维仿真程序模拟裂缝的形成。 |
| 6. | But thermal stress ca n ' t be calculated without damage . and then it provided in this article the equation of the elementary damage , material intensity , elasticity modulus and temperature evolvement of rupture energy . 6
微裂缝的形成与发展仍然是由温度应力造成的，但此温度应力应是考虑损伤行为的应力，据此，文中导出了反映初始损伤、材料强度、弹性模量以及断裂能的温度损伤演变方程。 |
| 7. | According to the dynamic evolvement rules of the stress , strain and fracture distribution or fatigue cracking mechanism , fatigue equation and axle load conversion of the steel bridge deck asphalt mixture surfacing are proposed
依据钢桥面沥青混合料铺装体系复合结构的应力场、应变场和损伤场在疲劳过程中的动态演变规律以及疲劳裂缝的形成机理，推导出钢桥面沥青铺装层疲劳性能方程和车辆轴载换算公式。 |
| 8. | 2 ) nonlinear fem was employed to simulate the whole process of changing internal force and deformation , the appearance and development of cracks , and to describe the failure mode and the ultimate strength capacity level . in addition , proven analysis model can provide more information so as to break the limits of test study
2 )通过密肋复合墙体非线性有限元分析，较为真实、简化地模拟墙体内力和变形发展的全过程，描述裂缝的形成和扩展以及墙体的破坏过程、破坏形态和极限承载力水平。 |
| 9. | The crack problem of hydraulic culvert and sluice engineering concrete is rather thoroughly studied in the present paper . concluded the shape of crack , analyzed the mechanism of cracking , and researched on the engineering measure for prevent from the cracking in this paper . mathematical model for kinds of engineering measures is calculated ; results from all kinds of measures are obtained
本文就水工涵闸工程混凝土的裂缝问题进行了详细的研究，总结了裂缝的形式，分析了裂缝的形成原因，对控制裂缝的工程措施进行了深入的研究，运用数学模型对种种工程措施进行计算，量化分析其效果。 |
| 10. | Through the research and analysis on the three aspects concerning the base interface of the pavement panel , crack accumulation , expansion in the pavement panel and interaction between spring plates on the road surface as well as its damage on the road fatigue , it is first brought forth that the process of fissures and breakage in the cement concrete pavement can be divided into three stages , i . e . stage of initial crack formation and damage in the bottom of the pavement slab , stage of accumulation , intensifying & expansion in ruptures from load during the time of use and stage of fissures & breakage in the pavement
通过对路面板底界面开裂、路面板中裂缝积聚、扩展和路面表面车板相互作用及其对路面疲劳破坏的影响等三个层面的研究和分析，首次提出水泥混凝土路面的开裂和破坏过程可以分为三个阶段，即路面板底初始损伤西南交通大学博士研究生学位论文第11页和早期裂缝的形成阶段、使用期间荷载作用对路面造成的开裂损伤累计、加剧和裂缝扩展阶段以及路面断裂破坏阶段。 |
