作　　者： ; ; (朱劲松）;

机构地区： 同济大学土木工程学院

出　　处： 《建筑材料学报》 2005年第6期609-614,共6页

摘　　要： 探讨了混凝土材料的疲劳损伤特性与损伤混凝土本构行为模拟的简化手段.以系统的普通混凝土单轴、双轴与三轴疲劳试验结果为基础,在我国《混凝土结构设计规范》(GB 50010-2002)给出的单轴混凝土本构关系中引入损伤变量,建立了混凝土的等效单轴疲劳损伤本构关系.对试验结果的模拟分析表明,所建立的模型能有效模拟混凝土在高周疲劳过程中的强度和刚度衰减规律,为疲劳荷载作用下钢筋混凝土结构的承载力计算与剩余寿命评估提供了便利的手段. The fatigue behavior and the post-damaged equivalent constitutive law of plain concrete were discussed. The uniaxial constitutive law of plain concrete in the Code for Design of Concrete Structures of China（GB 50010-2002 ） was modified by introducing the damage variable to model the constitutive law of damaged materials based on systematic experimental study of plain concrete under uniaxial, biaxial and triaxial fatigue loading. The capacity of the present model to simulate the attenuation laws of deformation modulus and the residual strength of concrete under uniaxial cyclic compression was assessed by a simulation example. A convenient method was obtained to analyse the load capacity and residual life of reinforced concrete structures under fatigue loading from the present study.

关 键 词： 混凝土 疲劳 损伤 本构关系

领　　域： [建筑科学]