英语翻译混凝土是土木工程中广泛应用的一种建筑材料,目前己经逐渐被应用到核电站安全壳、海洋平台、高拱坝等复杂结构中.对于这

英语翻译
混凝土是土木工程中广泛应用的一种建筑材料,目前己经逐渐被应用到核电站安全壳、海洋平台、高拱坝等复杂结构中.对于这些复杂结构,正确的分析和合理的设计又必须依赖于混凝土多轴受力状态下的本构关系和破坏准则.从目前来看,材料力学试验和细观数值分析是两条重要途径,而混凝土多轴受力试验无论是加载设备还是测试技术均是相当复杂的.因此,随着高性能计算机以及数值算法的迅速发展,相对更为廉价的细观数值分析有望弥补或替代部分材料试验.本文主要是借助软件FLAC3D对不同边界条件下,分别对带有单边和双边缺口的混凝土四点剪切梁的破坏过程进行了来进行数值模拟,得到试件表面变形过程中局部的位移分布和演化以及应变分布及其演化过程图象,并与其混凝土断裂损伤实验进行简要地分析对比.
针对工程中常用的C35混凝土,生成了相应的数值试样,对它们进行了单轴载荷下的数值模拟.根据得到的应力一应变曲线和裂纹演化图,分析了混凝土Ⅱ型裂纹的断裂过程.结果表明,四点剪切加载条件下,混凝土断裂存在3种基本的断裂形式,同时混凝土的断裂存在明显的尺寸效应.随着试件厚度不同混凝土表现出不同的断裂形式.
总之,本论文为混凝土力学性能的数值模拟提供了新的研究途径,是进行混凝土在多轴受力情况下的值模拟的基础性工作.

Concrete is widely applied in civil engineering of a kind of building materials, at present already gradually being applied to secure nuclear power station, offshore, high arch dam in such complex structures. For these complex structure, the correct analysis and reasonable design and must rely on concrete under multiaxial loading states the constitutive relation and failure criteria. Judging from the current, material mechanics test and mesoscopic numerical analysis are two important ways, and concrete multiaxial stress test whether loading equipment or test technology are quite complex. Therefore, with numerical algorithm of high performance computer and the rapid development of more cheap relative mesoscopic numerical analysis are expected to compensate for or substitute partly material experiment. This paper is mainly using software to different boundary conditions FLAC3D respectively, with unilateral and bilateral gap of the concrete shear beams the damage process of four to simulate the specimens, get the surface deformation process local displacement distribution and evolution of strain distribution and its evolution process and its concrete image, and fracture damage experiment contrast analyzed briefly.