混凝土Ⅰ-Ⅱ复合型裂缝断裂损伤区分析  

Analysis of Damage and Fracture Zone of Ⅰ-ⅡConcrete Mixed Mode Cracks

作　　者：韩金启 王向东[1] 王玉琳[1] 

机构地区：[1]河海大学力学与材料学院

出　　处：《大连交通大学学报》2015年第6期62-66,共5页Journal of Dalian Jiaotong University

基　　金：国家自然科学基金资助项目(50878077);"十一五"国家科技支撑计划资助项目(2008BAB29B03)

摘　　要：将损伤理论引入混凝土的断裂分析中,采用Loland模型推导出混凝土I-Ⅱ复合型裂缝缝端损伤区临界区域的公式,并基于复合裂缝断裂判据推导出I-Ⅱ复合型裂缝的缝端微裂纹区临界区域的公式,并引用相关文献中的混凝土参数作为实例,求出其最小断裂半径以及对应的最小损伤半径.通过实例说明了混凝土损伤断裂的过程.Introducing damage theory into fracture tip of Ⅰ-Ⅱ mixed mode cracks is derived, and th mixed mode cracks is derived based on composite analysis the critical damage area formula of concrete crack e critical fracture area formula of concrete crack tip of Ⅰ-Ⅱ fracture fracture criterion. Based on the parameters of the concrete in related literature as an example, the minimum damage radius are found, process of concrete damage and fracture is presented through the example the description of the

关 键 词：混凝土 断裂 损伤 复合型裂缝 临界状态 

分 类 号：TU528[建筑科学—建筑技术科学]