混凝土的连续损伤模型和弥散裂缝模型  

Continuum Damage Mechanics Model and Smeared-crack Model for Concrete

作　　者：吴建营[1] 李杰[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《同济大学学报（自然科学版）》2004年第11期1428-1432,共5页Journal of Tongji University:Natural Science

摘　　要：将经典的混凝土弥散裂缝模型应用到所建议的一类基于能量的弹塑性损伤本构模型的统一理论框架中 ,并推导了剪切模量和剪力保持因子与受剪损伤变量的关系式 .模型可以直接应用于多维应力状态下 ,避免了弥散裂缝模型中存在的参数经验取值问题 .最后 ,通过一个钢筋混凝土单向板的数值算例 ,验证了模型的有效性 .The classical smeared crack model and the energy-based elastoplastic damage model proposed by the authors are briefly introduced in this paper.It is then illustrated that the smeared crack model can be put into the unified frameworks of the proposed model.The relations of the shear module and the shear retention factor to the shear damage variable are also derived.One numerical simulation of a reinforced concrete slab which demonstrates the efficiency of the presented model concludes this paper.

关 键 词：混凝土 弥散裂缝模型 连续损伤模型 损伤变量 

分 类 号：TU311[建筑科学—结构工程] O32[理学—一般力学与力学基础]