钢纤维混凝土浇筑过程中纤维运动的数值模拟

发布时间：2018-03-17 18:35

本文选题：钢纤维混凝土　切入点：纤维分布　出处：《天津大学学报(自然科学与工程技术版)》2017年06期 　论文类型：期刊论文

【摘要】：纤维混凝土构件内纤维的分布形态对其受力性能有着直接的影响,因此,研究自密实混凝土浇筑过程中纤维的运动以及得到其在构件内部最终的分布形态具有十分重要的意义.本文利用ANSYS CFX软件中的流体计算模块及拉格朗日粒子追踪功能,通过MATLAB自编程序调用和完善ANSYS CFX强大的流体计算能力,得到一种模拟自密实钢纤维混凝土浇筑过程中纤维运动的新方法.将单根钢纤维简化为两个距离固定(为纤维长度)的球形粒子,ANSYS CFX模拟粒子在整个浇筑过程中的运动,MATLAB自编程序控制粒子之间的固定配对并保证每对粒子在计算过程中保持相对距离不变.通过数值模拟浇筑一根1,200mm×150mm×150mm的梁来验证计算的精确性.将模拟结果与实验结果进行对比,证明了模拟方法的适用有效性.这种新方法可用于各种掺量刚性纤维自密实混凝土的浇筑流动模拟.
[Abstract]:The distribution of fibers in fiber reinforced concrete members has a direct effect on their mechanical properties. It is very important to study the movement of fiber in the process of self-compacting concrete pouring and to obtain its final distribution in the component. In this paper, the fluid calculation module in ANSYS CFX and the Lagrangian particle tracing function are used. The powerful fluid computing ability of ANSYS CFX is called and perfected by MATLAB program. A new method for simulating the fiber movement during the pouring process of self-compacting steel fiber concrete is presented. The single steel fiber is simplified as a spherical particle with two distances fixed (fiber length). During the whole pouring process, the single steel fiber is simplified as a spherical particle with fixed distance (for fiber length). The MATLAB program controls the fixed pairing between particles and ensures that the relative distance of each pair of particles remains constant in the course of calculation. The accuracy of the calculation is verified by the numerical simulation of a beam of 1ton 200mm 脳 150mm 脳 150mm. The results of the experiment were compared. The new method can be used to simulate the pouring flow of various kinds of rigid fiber self-compacting concrete.
【作者单位】：天津大学建筑工程学院;滨海土木工程结构与安全教育部重点实验室(天津大学);
【基金】：国家自然科学基金资助项目(51227006)~~
【分类号】：TU755

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