摘要
本文对普通混凝土经冻融后在三向压荷载作用下的变形和强度特性进行了试验研究。试件尺寸为100mm×100mm×100mm。试验过程中测得了混凝土在常态和经过25次、50次、75次三个级别的冻融循环后在三轴压作用下的应力～应变关系曲线和三轴强度,分析了主应力σ1、σ2和σ3及其应变随冻融循环次数和主应力比的变化规律,观察了试件的破坏形态,建立了相应的破坏准则。
Experimental study on the strength and deformation of concrete under triaxial compression after freezing-thawing cycles is carried out.The dimension of the concrete specimens is 100mm×100mm×100mm.The stress-strain curves and triaxial compressive strength of concrete under triaxial compression loading freezing-thawing cycles of 0,25,50,75 times are obtained respectively.The effect of the number of freezing-thawing cycles and the principal stress ratio on the principal compressive strength σ_1?σ_2?σ_3 and corresponding situation are analyzed.The failure patterns of concrete specimens are described.The failure criterion of concrete under triaxial compression freezing-thawing cycles is proposed.
出处
《混凝土》
CAS
CSCD
北大核心
2005年第2期3-7,共5页
Concrete
关键词
混凝土
冻融循环
三轴受压
破坏准则
concrete
freezing-thawing cycles
triaxial compression
failure criterion
