摘要
结合Griffith强度准则,借助Abaqus有限元分析软件,通过二维、三维有限元模型的计算分析,对混凝土劈裂抗拉强度试验中,圆柱体和立方体试件加载点附近应力集中程度做出评价,建议采用平台圆柱体试件,并提出建议相对平台宽度和立方体试件的建议相对垫条宽度。并在考虑试件三维应力分布规律后,提出两种试件的劈裂抗拉强度的修正计算公式。
Combining with Griffith strength criterion, using the finite element analysis program-Abaqus,through the calculation of 2D and 3D finite element model, the degree of the stress concentration near the loadpoint of the cylinder specimen and the cube specimen in a concrete splitting tensile strength test wasevaluated. The platform cylinder specimen and the relative platform width of it, and relative strap width of thecube specimen were suggested. Considering the three dimensional stress distribution, the formulas to calculatethe splitting tensile strength of the two kinds of specimen were proposed.
出处
《结构工程师》
北大核心
2016年第3期45-49,共5页
Structural Engineers
关键词
劈裂试验
应力集中
平台圆柱体
相对平台宽度
相对垫条宽度
建议公式
splitting test, stress concentration, platform cylinder, relative platform width, relative strapwidth, recommended formulas
