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首页> 外文会议>Long Time Effects and Seepage Behavior of Dams >ORIGINAL RESEARCH OF THREE DIMENSION NUMERICAL VALUE ANALYSIS METHOD ON CONCRETE MECHANICS PERFORMANCE
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ORIGINAL RESEARCH OF THREE DIMENSION NUMERICAL VALUE ANALYSIS METHOD ON CONCRETE MECHANICS PERFORMANCE

机译：混凝土力学性能的三维数值分析方法初探

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摘要

Under the three dimensional coordinate system, through transformed X, Y, Z coordinate to obtain three kind of spheriform aggregates, according to the aggregate grading theoretical to calculate the aggregate pellet number in the three dimensional numerical concretes specimen, used the Monte Carlo methods to create stochastic position of the aggregate pellet in specimen, established the three dimensional sphere stochastic aggregate model of concretes; Defines the aggregate and the mortar matrix material parameter separately to the three dimensional concretes specimen with this construction relations, carrying on the finite element grid separately, carrying on the loading test to the numerical concretes specimen based on this, obtained the concretes uniaxial stretch and the uniaxial compression stress-strain relations, and drew the peak stress nephogram and the stress-strain curve of step by step loaded condition separately. The research indicated that in the existing production method of stochastic aggregate and material parametric model, existing many problems, such as the aggregate position fast search mathematics algorithm, the numerical contact surface model of each material region and how to achieve it by the computer, the description method of material damage dehiscence crack, the highly effective fast algorithm of the material numerical simulation, the break criterion which can respond the concretes actual spoilage process and so on many actual problem which remains unresolved, these questions will be the hot spot later.
机译：在三维坐标系下，通过变换X，Y，Z坐标得到三种球状骨料，根据骨料分级理论，计算出三维数值混凝土试件中的骨料粒数，采用蒙特卡洛法建立骨料颗粒在试样中的随机位置，建立了混凝土的三维球形随机骨料模型。以此构造关系分别对三维混凝土试件定义骨料和砂浆基质材料参数，分别进行有限元网格，在此基础上对数值混凝土试件进行载荷试验，得到混凝土的单轴拉伸及单轴压缩应力-应变关系，并分别绘制了峰值应力波形图和逐步加载条件下的应力-应变曲线。研究表明，在现有的随机骨料和材料参数模型的生产方法中，存在许多问题，例如骨料位置快速搜索数学算法，各个材料区域的数值接触面模型以及如何通过计算机来实现，材料损伤开裂裂纹的描述方法，材料数值模拟的高效快速算法，能够响应混凝土实际变质过程的破坏准则等许多尚未解决的实际问题，这些问题将成为以后的热点。

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