随机力学参量对混凝土细观损伤演化的影响.pdfVIP

学兔兔 第27卷 第4期 建筑科学与工程学报 Vo1．27 NO．4 2010年 12月 J ournal of Architectureand Civil Engineering Dec．2O10 文章编号：1 673—2049(201O)04—0001 06 随机力学参量对混凝土细观 损伤演化的影响 丰茂东 。，李建波 ，林 皋 ，刘智光 (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) 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。 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 中图分类号：TU528．O41 文献标志码：A Influence of Stochastic Mechanical Parameters on Meso—damage Evolution of Concrete FENG Mao—dong ～，LI Jian～bo ，LIN Gao ，LIU Zhi—guang (1．Faculty of Infrastructure Engineering，Dalian University of Technology，Dalian 116024，Liaoning，China； 2．Dalian Urban Development Design Co．，Ltd，Dalian 116012，Liaoning，China) Abstract：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．