摘要
多孔多相的饱和混凝土中,孔隙自由水对混凝土的力学特性有显著的影响。该文基于损伤力学基本原理建立了单轴压缩条件下水饱和混凝土的弹塑性损伤本构模型,并结合太沙基"有效应力原理",认为材料的损伤是由本体有效应力和结构有效应力引起的,根据应力平衡条件得出了两种有效应力下的应力关系方程,并在此基础上建立了水饱和混凝土的单轴压缩损伤演化方程。
In multi-phase porous saturated concrete, pore water in the saturated concrete has a remarkableinfluence on the mechanical property of concrete. Based on the basic principles of damage mechanics, an elasto-plastic damage constitutive model for water-saturated concrete under uniaxial compression is established. Combined with the Terzaghi＇s effective stress principle, it is found that the effective stresses of the body and structure lead to the damage of material. According to the stress equilibrium condition, the two kinds of effective stress relationship are attained. And on this basis, the damage evolution equation of water-saturated concrete under uniaxial compression is established.
出处
《工程力学》
EI
CSCD
北大核心
2011年第11期59-63,88,共6页
Engineering Mechanics
基金
国家自然科学基金项目(10872133)
上海市浦江人才计划项目(09PJ1407700)
关键词
水饱和混凝土
单轴压缩
本构模型
有效应力
演化方程
water-satrated concrete
uniaxial compression
constitutive model
effective stress
evolutionequation
