软化指数对混凝土断裂过程区尺度的影响  

Influence of Tensile Strain Softening Index on Size of Fracture Process Zone

作　　者：张彦龙[1] 段树金[1] 安蕊梅[1] 

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043

出　　处：《石家庄铁道大学学报（自然科学版）》2014年第2期19-22,共4页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：河北省高等学校科学技术研究重点项目(ZH2012040)

摘　　要：应用Muskhelishvil应力函数全场解,根据幂指数函数描述的混凝土拉应变软化模型导出断裂过程区(FPZ)过程值及临界值的解析表达式,分析了在最大拉应变强度理论下软化指数对FPZ过程值及临界值的影响。结果表明:混凝土FPZ过程值及临界值都随着软化指数的增加而增加,不同泊松比下变化规律相近。The developing size and critical size of concrete fracture process zone （ FPZ） is obtained by use of a power exponent function considering the effect of the tensile strain softening based on the stress function of Muskhelishvil .The influences of tensile strain softening index on the developing size and critical size of FPZ are studied .The results show that the developing size and critical size of FPZ increase with the increasing tensile strain softening index and the law is very identical with different Poisson＇s ratios.

关 键 词：混凝土 断裂力学 断裂过程区 软化指数 

分 类 号：TU528.1[建筑科学—建筑技术科学]