自密实混凝土中钢纤维分布和取向的数值模拟方法

发布时间：2018-04-13 07:03

本文选题：钢纤维自密实混凝土 + 钢纤维的分布　；参考：《混凝土》2017年04期

【摘要】：钢纤维自密实混凝土结合了钢纤维混凝土与自密实混凝土两者的优点,被认为拥有非常好的工程应用前景。由于钢纤维自密实混凝土具有良好的流动性和免振捣等特点,其浇筑过程将直接决定钢纤维的最终分布和取向状态,这必然会影响钢纤维混凝土构件的力学性能。通过对钢纤维进行一定的简化处理,应用计算流体力学软件ANSYS CFX结合MATLAB自编程序提出了一种新的模拟钢纤维自密实混凝土浇筑过程的方法。利用该方法对一根钢纤维自密实混凝土梁的浇筑过程进行模拟,统计了钢纤维的最终分布状态,通过对比试验结果和计算结果,验证了数值模拟方法的有效性。并运用该数值模拟方法总结钢纤维分布和取向规律,对试验研究以及工程应用有一定的指导意义。
[Abstract]:Steel fiber self-compacting concrete combines the advantages of steel fiber concrete and self-compacting concrete and is considered to have a very good engineering application prospect.Because steel fiber self-compacting concrete has the characteristics of good fluidity and free from vibration, its pouring process will directly determine the final distribution and orientation of steel fiber, which will inevitably affect the mechanical properties of steel fiber reinforced concrete members.A new method to simulate the pouring process of steel fiber self-compacting concrete is proposed by using the computational fluid dynamics software ANSYS CFX and the MATLAB self-compiled program through the simplified treatment of steel fiber.By using this method, the pouring process of a steel fiber self-compacting concrete beam is simulated, and the final distribution of steel fiber is calculated. The validity of the numerical simulation method is verified by comparing the experimental results with the calculated results.The numerical simulation method is used to summarize the distribution and orientation of steel fibers, which is of certain guiding significance to the experimental research and engineering application.
【作者单位】：天津大学建筑工程学院;天津大学滨海土木工程结构与安全教育部重点实验室;
【基金】：国家级重点基金资助项目(51227006)
【分类号】：TU528

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