摘要
通过不同砂率砂浆试样的单轴受压应力-应变全曲线试验,分析砂率对砂浆试样应力-应变全曲线形状和砂浆试样破坏形态、抗压强度、峰值及极限应变的影响。结果表明:砂浆试样应力-应变全曲线由上升段和下降段组成,根据下降段曲线斜率符号的不同,下降段曲线又分为I类行为和II类行为;不同砂率试样的破坏形态存在差异,随着砂率的提高,破坏形态按劈裂破坏、多个共轭斜面的剪切破坏、单斜截面剪切破坏的规律变化。采用3次多项式,拟合了砂浆试样抗压强度与砂率之间的函数关系;采用2次多项式和乘幂方程式分别对曲线上升段和下降段拟合,拟合结果与试验点吻合较好。
The complete stress-strain curves of mortar sample with different sand content percentages were tested and investigated.An analysis was made of the influence of varying SP on the complete stress-strain curve,failure mode of Mortar sample,compressive strength,peak strain,ultimate strain and etc.The test results show that the stress-strain curves of mortar sample are made up of the rise and fall sections.According to the slope of descending curve of the different symbols,it is further divided into I and II category of acts.Different SP are different of failure mode,With the increase in the SP,from splitting damage,conjugate damage to shear failure of a single diagonal section.Using three polynomial,the Fitting a function of the compressive strength of mortar samples with SP;with two polynomial fitting of the curve ascending and using exponentiation of equation fitting of the curve descending curve,and descending ascending curve fitting,fitting results in good agreement with the experimental.
出处
《混凝土》
CAS
CSCD
北大核心
2010年第7期110-112,共3页
Concrete
基金
山东省自然科学基金(Y2008F16)
国家大学生创新性试验计划项目(091043430)
关键词
砂浆试样
单轴受压
应力-应变全曲线
砂率
mortar sample
uniaxial loading
complete stress-strain curve
sand ratio
