钢纤维自密实混凝土梁抗弯性能的数值模拟方法  

Numerical Simulation Method for Flexural Behavior of Steel Fiber Reinforced Self-compacting Concrete Beams

作　　者：毕继红[1,2] 姬君浩 关健[1] 赵云 霍琳颖 BI Jihong;JI Junhao;GUAN Jian;ZHAO Yun;HUO Linying(School of Civil Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Coast Civil Structure Safety,Ministry of Education,Tianjin University,Tianjin 300072,China)

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

出　　处：《材料科学与工程学报》2020年第3期455-459,F0003,共6页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(51227006)。

摘　　要：钢纤维自密实混凝土梁的抗弯性能与钢纤维的取向有密切关系,而基于钢纤维取向对其抗弯性能进行的数值模拟研究较少。借助Moldex3D软件模拟并分析了浇筑完成后钢纤维的取向概率,在此基础上由Final-v11有限元软件建立钢纤维自密实混凝土梁模型并进行数值计算,通过与试验对比结构的荷载位移曲线、裂缝开展过程等方面,验证了该数值模拟方法的有效性。由变参数研究表明,当浇注位置由梁端向跨中移动时,梁的开裂荷载几乎不变,极限荷载和抗弯刚度的减小幅度不断增大。Orientation of steel fiber has an important effect on the flexural behavior of steel fiber reinforced self-compacting concrete beams.However,there are few numerical simulation studies in this area.Orientation probability of steel fiber after pouring was simulated and analyzed by Moldex3D software.On this basis,a model of steel fiber reinforced self-compacting concrete beam was built and calculated by Final-v11 finite element software.Through comparison with experimental data in terms of the cracking process and load displacement curve,this numerical simulation method was verified.It can be concluded from the parametric analysis that when the pouring position moves from the end of the beam to the middle,the initial cracking load is almost constant,while the ultimate load and bending stiffness decrease rapidly.

关 键 词：钢纤维自密实混凝土 钢纤维取向 数值模拟 抗弯性能 

分 类 号：TU528[建筑科学—建筑技术科学]