混杂纤维RAC梁开裂弯矩和抗裂性能有限元分析  

Finite element analysis of cracking moment and crack resistance of mixed fiber RAC beams

作　　者：田思思 裴长春[1] TIAN Sisi;PEI Changchun(College of Engineering,Yanbian University,Yanji 133002,Jilin,China)

机构地区：[1]延边大学工学院,吉林延吉133002

出　　处：《工程建设》2023年第5期11-16,共6页Engineering Construction

摘　　要：为研究不同混杂纤维掺量对再生混凝土(RAC)梁抗裂性能的影响,本文通过有限元分析软件ANSYS对6根RAC梁的开裂荷载、屈服荷载、开裂状态和屈服状态下的挠度以及开裂应力、屈服应力进行分析,并根据6组混杂废弃纺织纤维RAC梁的试验数据和《水工混凝土结构设计规范》推算混杂废弃纺织纤维RAC梁开裂弯矩的理论计算公式。结果表明:1)掺入适当比例的废弃纺织纤维与玄武岩纤维可有效降低RAC梁的跨中挠度,增强RAC梁的刚度;2)推算出的理论公式计算值与试验值吻合良好。In order to study the effect of different mixed fiber content on the crack resistance of recycled concrete(RAC)beams,the cracking load,yield load,cracking state of six RAC beams,as well as deflection in the yield state,cracking stress and yield stress are analyzed by finite element analysis software ANSYS;according to the test data of 6 groups of mixed waste textile fiber RAC beams and The Code for the Design of Hydraulic Concrete Structures,the theoretical calculation formula of cracking moment of RAC beams mixed with waste textile fibers is estimated.The results show that:1)The incorporation of appropriate proportions of waste textile fiber and basalt fiber can effectively reduce the midspan deflection of RAC beam and enhance the stiffness of RAC beam;2)The calculated value of the theoretical formula is in good agreement with the experimental value.

关 键 词：抗裂性能 废弃纺织纤维 跨中挠度 开裂弯矩 

分 类 号：TU528[建筑科学—建筑技术科学]