钢筋混凝土轴拉构件裂缝宽度有限元计算方法研究  

Finite Element Method for Calculating Crack Width of Reinforced Concrete Axial Members

作　　者：刘勇 郑志强 LIU Yong;ZHENG Zhiqiang(Hubei Energy Group Lushui Hydropower Co.,Ltd,Enshi 445800,China)

机构地区：[1]湖北能源集团溇水水电有限公司,湖北恩施445800

出　　处：《人民珠江》2018年第11期111-117,共7页Pearl River

摘　　要：以大型通用有限元软件ABAQUS为平台,建立了钢筋混凝土轴拉构件荷载作用下裂缝宽度的一种有限元计算方法。采用损伤塑性模型,考虑混凝土软化特性,对3组不同配筋率的轴拉试件进行非线性分析。数值分析结果表明,试件开裂位置、开裂荷载以及开裂处钢筋应力值均与试验实测结果较为接近。同时,通过裂缝宽度计算方法所得各级荷载作用下的裂缝宽度值与试验实测值吻合度也较好。表明提出的基于有限元的裂缝宽度计算方法具有一定的可行性和精确度,可以为实际工程中的裂缝宽度计算提供一定依据。In this paper,a large finite element software ABAQUS is used as a platform to establish a finite element calculation method for the crack width under load of reinforced concrete axial tension members.Using the damage plasticity model,taking into account the softening characteristics of concrete,nonlinear analysis of three sets of axial pull specimens with different reinforcement ratios.At the same time,the crack width under various loads obtained by the calculation method of crack width mentioned in this paper agrees well with the actual measured values.It shows that the finite element-based crack width calculation method proposed in this paper has certain feasibility and accuracy,and can provide a certain basis for the analysis and design of practical projects.

关 键 词：钢筋混凝土构件 裂缝宽度 损伤塑性 混凝土软化 

分 类 号：TV39[水利工程—水工结构工程]