研究承水压混凝土结构的损伤与渗透问题有利于地下工程结构的安全运营,譬如山岭隧道、城市地下结构等。从构成材料损伤理论框架的三个主要方面(场变量的定义、损伤演化方程、本构行为关系)系统地阐述混凝土的损伤机理,并宏细观地分析了混凝土损伤的基本特性。分析了水压下的混凝土渗透行为特性,并针对渗透对混凝土结构的破坏机理进行阐述。剖析混凝土渗流与混凝土损伤之间的耦合机理,建立了渗流-损伤耦合模型。
Researches on damage and penetration of concrete structure subj ected to hydraulic pressure can profit safe operation of underground proj ect,exemplified by tunnel and subway structure,etc..This review presents a sys-tematic description on concrete damage mechanism from three main aspects,i.e.definition,evolution equation and constitutive model,that constitute the framework of damage theory,and macroscopic and mesoscopic analyses over the basic characteristics of concrete damage.The penetrability of concrete subj ected to hydraulic pressure and breakage mechanism caused by penetration are discussed,and the coupled relationship between penetration and damage is also analyzed and the corresponding coupling model can be built.
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