混凝土损伤破坏的协同问题  

Oretic analysis of damage evolvement of concrete based on synergetics

作　　者：臧晓光[1] 潘永战[1,2] 王国艳[1,3] 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]河南科技大学建筑工程学院,河南洛阳471003 [3]辽宁工程技术大学力学与工程科学系,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2009年第4期585-588,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(50874046;50804026);山东省自然科学重点基金资助项目(Z2007F10);教育部博士点基金资助项目(200804290002);青岛市科技计划基金资助项目(07-2-J-16-jch)

摘　　要：针对混凝土的力学性能在很大程度上取决于初始损伤的问题,而现有的损伤力学研究观点和理论都是基于某种假定(或简化)对混凝土损伤演化进行研究,很难从本质上对混凝土损伤演化过程进行描述。尝试从系统的观点出发,采用热力学和协同学的基本理论和方法研究受载条件下的混凝土损伤演化问题。应用协同学的绝热消去法得到了材料考虑初始损伤条件下的非线性力学模型,研究破坏过程中的相变问题,并加以深入分析,获得了材料受载破坏过程中裂纹的平均取向规律,揭示了破坏过程中的声发射现象和体征规律,并应用数值模拟验证了理论分析的正确性。通过研究,有望得到混凝土损伤演化过程、本构关系等更本质的描述,为进一步研究损伤演化问题指明了方向。Analyze the synergetic damage of concrete by the mechod ot thermodynamics and synergetics based on the characteristics of original damage consist in such brittle materials. Structural defects in rock and concrete and its influence on material damage under loads is summarized and auctorial opinions are put forward about these questions. The controlled action, coactions and synergetic characteristics of structural defects to the process of material damage are analyzed. Synergetics effects of phase transition and acoustic emission of material damage process are studied. The evolvement equation and mechanics model are established and the damage process is described truly based on synergetics analysis. At last show the prospect of damage mechanics and destroy mechanics and point out that the main direction is to found the synergetic damage theory of concrete and study the effect mechanism of structural defects towards the damage process.

关 键 词：混凝土 初始损伤 协同演化 结构缺陷 

分 类 号：TU528.1[建筑科学—建筑技术科学]