MESOSCALE MODELLING OF CONCRETE UNDER SPLIT TENSION
In the present paper,a mesoscale model is adopted to model the concrete behaviour under split tension.The concrete material is assumed to consist of coarse aggregates,mortar matrix,and interfacial transition zone (ITZ).In the mesh generation process,random coarse aggregate particles are generated from a certain aggregate size distribution and then placed into the mortar matrix with ITZ between the coarse aggregate edge and the mortar matrix.Different aggragate shapes,i.e.,circular,oval,and polygons,are modelled to analyse the the gravel and crushed stone aggregates,respectively.Numerical simulation is used to model the dynamic damage response of a typical cube concrete specimen under split tension.Velocity boundary is added as a dynamic loading.Computational results obtained agree well with the normal experimental results.On the macroscale level,reasonable tensile stress-strain relationships obtained; on the mesoscale level,the stress wave distribution and the crack pattern are affected by the aggregate distribution.
Mesoscale model concrete split tension interfacial transition zone (ITZ)
Xiaoqing Zhou Yong Xia
College of Civil Engineering, Shenzhen University, Shenzhen 528060, P.R.China Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, P.R
国际会议
The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)
武汉
英文
971-976
2012-11-17（万方平台首次上网日期，不代表论文的发表时间）