随机力学参量对混凝土细观损伤演化的影响  

Influence of Stochastic Mechanical Parameters on Meso-damage Evolution of Concrete

作　　者：丰茂东[1,2] 李建波[1] 林皋[1] 刘智光[1] 

机构地区：[1]大连理工大学建设工程学部,辽宁大连116024 [2]大连都市发展设计有限公司,辽宁大连116012

出　　处：《建筑科学与工程学报》2010年第4期1-6,共6页Journal of Architecture and Civil Engineering

基　　金：国家自然科学基金项目(50679006);国家自然科学基金项目(50809013);教育部高等学校博士学科点专项科研基金项目(200801411099);水沙科学与水利水电工程国家重点实验室开放基金项目(2010-C-03)

摘　　要：基于随机骨料细观数值模型和弹脆性损伤破坏本构模型,研究了弹性模量、拉压强度等随机参量及其组合形式对试件宏观拉压强度的影响。结果表明:以弹性模量和强度的乘积作为一个综合随机参量,并以相关系数来反映它们之间的关系,较之传统独立考虑弹性模量和强度的随机分布,可获得更为合理的试件拉压损伤破坏全曲线,并与试验曲线有较好的吻合性。Based on the mesoscopic random aggregate model and brittle-damage constitutive model,the influences of random parameters,such as elastic modulus,tension-compression strength and their combinations on the macro tension-compression strength of specimen were studied.Results show that separately considering the random distribution of elastic modulus and strength,more reasonable tension-compression damage curve of specimen is obtained by utilizing the product of the strength and elastic modulus as integrated random parameter of the meso-element.Furthermore,the correlation coefficient is introduced to reflect the relationship between the strength and elastic modulus,the obtained numerical result shows a good coincidence with the experiment result.

关 键 词：混凝土 综合随机参量 细观数值模拟 细观损伤 相关系数 

分 类 号：TU528.041[建筑科学—建筑技术科学]