钢纤维活性粉末混凝土三点弯曲试验数值模拟  

Numerical simulation of three-point bending test of steel fiber active powder concrete

作　　者：王晓飞[1] 张晓虎 周海龙[1] Wang Xiaofei;Zhang Xiaohu;Zhou Hailong(College of Water Conservancy and Civil Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China;School of Civil Engineering,Guizhou University of Engineering Science,Bijie 551700,China)

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,内蒙古呼和浩特010018 [2]贵州工程技术应用学院土木建筑工程学院,贵州毕节551700

出　　处：《山西建筑》2021年第11期103-106,共4页Shanxi Architecture

摘　　要：运用Matlab软件编程,实现了钢纤维体积含量为1%的活性粉末混凝土棱柱体试件(40 mm×40 mm×160 mm)数值建模过程并储存钢纤维端点坐标值。对棱柱体试件进行六面体单元网格划分(六面体单元边长设定为2 mm)并记录六面体单元节点坐标值。由Matlab软件编程对棱柱体试件域内由钢纤维端点及六面体单元节点形成的点云进行四面体单元网格划分及网格质量优化,形成钢纤维RPC棱柱体数值试件。把数值试件导入LS-DYNA软件,钢纤维设定为杆单元,RPC基质选用Solid164单元,钢纤维杆单元与RPC基质单元均满足各向同性线弹性本构模型,通过对棱柱体试件三点弯曲试验进行数值模拟,发现数值模拟结果与试验结果一致性较好,说明该数值模拟方法合理可行。The numerical modeling process of steel fiber active powder concrete(1%)prism specimen(40 mm×40 mm×160 mm)is realized by using Matlab software and the endpoints coordinate values of steel fiber is stored.Hexahedral element meshing for prism specimen(the hexahedral element edge length is set to 2 mm)and record the hexahedral units node coordinate values.The tetrahedral element mesh generation and mesh quality optimization of point clouds formed by steel fiber endpoints and hexahedron element nodes in prism specimen domain are carried out by using Matlab software,and forming a steel fiber prism numerical specimen.Importing the numerical specimen into LS-DYNA software,steel fiber is set to rod unit,RPC matrix selected Solid164 unit,both the steel fiber rod unit and the RPC matrix unit meet the linear elastic constitutive model.By comparison numerical simulation results of three-point bending test with test results,it is found that the numerical simulation results are in good consistency with the test results,which prove that the numerical simulation method is feasible.

关 键 词：钢纤维 活性粉末混凝土 三点弯曲 数值模拟 

分 类 号：TU528[建筑科学—建筑技术科学]