剖析了各种钢筋混凝土裂缝模型的特点和适用范围。
The characteristics and suitable scope of the cracking models of reinforced concrete were dissected.
两种不同频域方法的一致结果，证明了理想裂缝模型解的正确性。
The time-harmonic responses of the system are first calculated by using an integral formulation of an ideal crack model.
将粘弹塑性统一本构理论引入程序中，同时采用了已经比较成熟的破坏准则和裂缝模型。
In this program the author adopt the viscoelastic-plastic unified constitutive theory, at the same time adopting the Kupfer-Gerstle destroy rule and mixed crack model.
运用上述强度准则及有限元分离裂缝模型提出了拱坝开裂的计算方法，并给出了应用实例。
The calculated method of crack extension of arch DAMS is proposed using this strength criterion and finite element discrete crack model, and with some practical examples given.
将非线性广义有限元法应用到混凝土开裂问题的研究，采用弥散裂缝模型，研制了相应的程序。
Apply the nonlinear GFEM to study the concrete crack problem, develop the corresponding program using the smeared crack model.
应用联合有限-离散元法结合弥散式旋转裂缝模型分析了地震作用下混凝土重力坝动力破坏过程。
This paper uses the combined finite-discrete element method with smeared rotating crack model to analyze the seismic rupture process simulation of concrete gravity dam under the action of earthquake.
碳酸盐岩油气藏在数值模拟的过程中往往缺少准确定量的裂缝模型，尤其是裂缝孔隙度和渗透率模型。
During the Carbonate gas reservoir's numerical simulation process, it is often short of exact and quantitative fracture model, especially porosity and permeability models.
其二描述直管的横向裂缝，建立了估算裂缝自由面远场效应、并与一维定型波模型匹配的简化裂缝模型。
The other is simplified crack model, which is used to describe the traverse crack, estimate approximately the free face farther field effect and match with the 1-D fixed shape wave.
在建立裂缝模型的基础上，分析了影响裂缝发育和开启程度的因素，进而提出了勘探裂缝圈闭的方法与技术。
Based on establishing fracture model, the authors analyze the factors influencing the growth of fractures and their openness, and then propose the method and technology for exploring fracture traps.
采用虚拟裂缝模型结合线弹性断裂力学的方法，分析了RPC（活性粉末混凝土）及纤维增强RPC的断裂特性；
The fracture properties of RPC(Reactive Powder Concrete) and fibre RPC are analyzed by the Fictitious Crack Model(FCM) and the linear elastic fracture mechanics.
国外将损伤力学理论引入到水力裂缝模型中，使裂缝模拟更加接近实际，从而推进了水力裂缝动态行为的理论研究。
The continuous damage mechanics theory was applied in hydraulic fracture models and finally could make the results of fracture simulation meet actual conditions in recent years.
为进行连续介质到非连续介质转化的数值模拟，实现结构破坏过程的仿真分析，将固定和旋转的弥散裂缝模型与变形体离散元方法结合应用于混凝土、岩石等准脆性材料的受拉开裂过程分析。
Fixed and rotating smeared-crack models based on a deformable distinct element method were developed to analyze the fracture of quasi-brittle materials such as concrete and rock under tension.
第一个预测模型沿着地震断层，即地壳中的裂缝，寻找所谓的地震缝隙。
The first prediction model looks along earthquake faults, those cracks in the Earth's crust, to find what are known as seismic gaps.
模型中包括射孔孔眼、套管、水泥环、油层、微环隙和横向裂缝。
The model consists of perforation, wellbore, cement casing, oil layer, micro-annulus and transverse fracture.
结果表明，裂缝不可渗透的边界模型在一定条件下可以合理使用。
It is observed that the crack impermeable model can be used under some condition.
针对材料性能的随机性和裂缝分布的随机性，引入了随机性模型，采用蒙特卡罗法来模拟其随机性。
Aiming at the randomicity of concrete crack, the author adopt the randomicity finite element model and Monte-Carlomethod to simulate the randomicity of material character and crack distribution.
提出了定向射孔水力压裂裂缝的延伸轨迹计算模型和步骤，编制了裂缝延伸的模拟软件。
The models and computation procedures for determining fracture propagation path were provided, and the software for simulation of fracture propagation was developed.
裂缝预测结果受地质模型、几何框架模型、岩石的力学性质和区域背景应力的影响。
The results of fracture prediction would be affected by geologic model, geometric framework model, rock mechanics properties and regional stress background.
模型研究表明，利用本方法能够较精确地获得地下裂缝性地层的各向异性参数。
Modeling research shows that the method may be used to know the anisotropic parameters of fractured formation.
该模型也同样适用裂缝自然闭合的情况。
The condition of natural fracture closure was adaptable in the model.
在分析试验结果的基础上，提出了确定裂缝闭合弯矩(或应力)的力学模型和计算公式。
Based on the test results, the calculation model and the method for predicting crack closing moments (or stresses) are presented.
并且该模型对裂缝系统的相对渗透率不作取对角线的假定。
Relative permeability curve in fracture system without simplifying assumption is adopted in the model.
根据地震相干体，预测出裂缝的分布，引入等效介质理论，建立了地质模型。
According to seismic coherent body, this paper predicts distribution of fractures, USES equivalent medium theory, and establishes geologic model.
对以刚度均减和裂缝概念为基础建立的两种模型进行效果和优劣比较。
Models based on uniform reduction of stiffness and smeared crack concept are both employed to compare the (efficiency) and (relative) advantages of each model.
文中通过一系列模型坝的实验，研究了裂缝形成的条件。
A series of model tests have been carried out for studying the conditions favouring the development of such cracks.
本文采用三维有限元模型分析了荷载作用下自上而下裂缝尖端的应力强度因子，并与二维平面应变模型分析的结果进行比较。
In this thesis, the stress intensity factors of top-down cracks caused by loading are calculated using three dimensional finite element model and compared to the results of plane strain model.
通过力学计算设计的室内模型能较好地模拟荷载型反射裂缝和评价不同混合料的抗反射裂缝能力；
The model designed through finite element analysis can simulate the reflective cracking caused by load and evaluate the reflective cracking resistance of different asphalt mixtures.
在研究裂缝失稳机理及特征的基础上，应用突变理论，建立了裂缝的突变模型，并得出裂缝稳定性的判据。
Based on analyzing the mechanism of destabilization of crack in dam, the mutation model is established by use of catastrophe theory, and the criterion of the stability of crack is given.
建立了桥面裂缝之上防水层张力的计算模型，有效地计算出桥面混凝土一定宽度裂缝上防水层须具备的最小延伸率和拉伸强度。
Established the calculation model of waterproof layer tensile above bridge crack, compute a minimum extension and strength the waterproofing layer must have hi a certain width crack.
基于选定的路面力学模型，采用断裂力学中的疲劳裂缝扩展理论对路面反射裂缝的扩展规律进行分析。
Based on the pavement mechanics models, fatigue cracking theory of fracture mechanics was used to investigate the rule of reflection cracking.
应用推荐