考虑纤维取向的自密实混凝土梁抗弯性能分析  

Numerical Analysis of Flexural Behavior of Self-compacting Concrete Considering the Orientation of Steel Fiber

作　　者：毕继红[1,2] 王雪冬 赵云 霍琳颖 王照耀 Bi Jihong;Wang Xuedong;Zhao Yun;Huo Linying;Wang Zhaoyao(School of Civil Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Coast Civil Structure Safety,Tianjin 300072,China)

机构地区：[1]天津大学建筑工程学院,天津300072 [2]滨海土木工程结构与安全教育部重点实验室,天津300072

出　　处：《石家庄铁道大学学报（自然科学版）》2021年第3期1-7,59,共8页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家自然科学基金(51227006)。

摘　　要：为了探究自密实混凝土中钢纤维取向分布对梁抗弯性能的影响,考虑纤维在梁中的取向分布,提出了一种能够模拟钢纤维自密实混凝土梁力学性能的数值模拟方法。首先,结合流体动力学软件CFX和Matlab编程,对钢纤维自密实混凝土梁的浇筑过程进行模拟;然后,基于混凝土梁浇筑模拟得到的钢纤维取向,并考虑钢纤维的粘结滑移作用,采用有限元软件FINAL对钢纤维自密实混凝土梁进行数值计算。通过与三点弯曲试验结果进行对比,对提出的数值模拟方法进行验证,同时采用该方法进行了参数化分析。In order to explore the influence of orientation distribution of steel fiber on the flexural behavior of steel fiber reinforced self-compacting concrete,the paper presented an numerical approach to simulate the mechanical properties of steel fiber reinforced self-compacting concrete.Firstly,the pouring process of steel fiber reinforced self compacting concrete was simulated by CFX and Matlab.Then,based on the orientation distribution of steel fibers obtained from the pouring simulation of self-compacting concrete and considering the bond-slip behavior between matrix and fibers,FINAL was used to simulate the mechanical properties of steel fiber reinforced self-compacting concrete.Compared with the results of three-point bending tests,the proposed numerical simulation method was verified,and the parametric analysis was carried out by using this method.

关 键 词：钢纤维自密实混凝土 取向系数 抗弯性能 高斯分布 

分 类 号：TU528.572[建筑科学—建筑技术科学]