%0 Journal Article
%T Experimental Study of Concrete Meso-Damage Evolution Mechanism Based on Uniaxial Compression CT Method<br>单轴压缩条件下混凝土细观损伤演化机理的CT试验研究
%A TIAN Wei
%A DANG Fa-ning
%A CHEN Hou-qun
%A <br>田威
%A 党发宁
%A 陈厚群
%J 实验力学
%D 2011
%I 
%X Concrete is a heterogeneous material and may be considered as a three-phase composite consisting of aggregate, mortar and interface between aggregate and mortar from a mesoscopic view. The variation characteristics of CT average number were analyzed by CT scan images of meso-damage process, based on CT testing of concrete meso-damage evolution under unaxial compression. Concrete damage process may be divided into several stages, and the method of extracting the damage variable was proposed. Considering the experimentally obtained macro stress-strain curve, the relation between the damage variable and macro strain was obtained by data fitting. A new equation of damage evolution damage and a damage constitutive model were established. Through comparing and analyzing, the obtained theory results coincide well with the experimental results. So the concrete meso damage-fracture mechanism was deeply investigated.
%K concrete
%K meso-damage
%K Computerized tomography
%K damage variable
%K constitutive model<br>混凝土
%K 细观损伤
%K CT
%K 损伤变量
%K 本构模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=49067A0A0D864088C06A84AACB51A5B2&aid=29FA679B61699A526FE1C79A343547ED&yid=9377ED8094509821&vid=96C778EE049EE47D&iid=CA4FD0336C81A37A&sid=318E4CC20AED4940&eid=BFE7933E5EEA150D&journal_id=1001-4888&journal_name=实验力学&referenced_num=0&reference_num=9