MULTI-SCALE NUMERICAL MODEL FOR SIMULATING CONCRETE MATERIAL BASED ON FRACTAL THEORY  

作　　者：Qiang Xu Jianyun Chen Jing Li Mingming Wang 

机构地区：[1]School of Civil and Hydraulic Eng., Dalian University of Technology [2]State Key Lab. of Coastal and Ofshore Eng., Dalian University of Technology

出　　处：《Acta Mechanica Solida Sinica》2013年第4期344-352,共9页固体力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51109029,51178081,51138001 and51009020);the China Postdoctoral Science Foundation(No.20110491535)

摘　　要：A new multi-scale numerical model is presented using the fractal theory and adopting FEM to simulate the failure of concrete.The relation between the fractal box dimension in large scale and the damage to concrete in small scale is deduced.And the evolutionary process of elastic modulus and strength in small scale is given.Consequently,the multi-scale numerical model is proposed to describe the constitutive relation of concrete between small scale and large scale.A two-dimensional static analysis of a concrete block is performed by using this model and the calculation result is discussed.The propagation of cracks of the concrete block is also studied.A new multi-scale numerical model is presented using the fractal theory and adopting FEM to simulate the failure of concrete.The relation between the fractal box dimension in large scale and the damage to concrete in small scale is deduced.And the evolutionary process of elastic modulus and strength in small scale is given.Consequently,the multi-scale numerical model is proposed to describe the constitutive relation of concrete between small scale and large scale.A two-dimensional static analysis of a concrete block is performed by using this model and the calculation result is discussed.The propagation of cracks of the concrete block is also studied.

关 键 词：fractal theory concrete material fractal box dimension DAMAGE multi-scale constitutive relation 

分 类 号：TU528[建筑科学—建筑技术科学]