摘要
为了分析塑性混凝土应力应变关系,共设计8组配合比48个试件,进行了了单轴抗压试验,得到了塑性混凝土典型的应力应变曲线。通过将其与常规混凝土应力应变关系曲线进行对比,并从应变、应力、曲线切线斜率、裂缝4个方面进行分析,得到了塑性混凝土全过程的应力应变特性。研究发现,塑性混凝土应力应变曲线上升段规律符合Boltzmann模型,下降段规律符合Logistic模型,其拟合程度超过95%。结合上升段和下降段的数学模型,通过研究给出了模型参数的物理意义,可反映出塑性混凝土应力应变的基本特性。研究成果对塑性混凝土弹性模量测试、设计、施工等工作具有参考意义。
For the relationship of the stress-strain of plastic concrete ,the authors design eight mix proportion and forty-eight specimens to take the single-axle compressive test ,then we obtain the typical stress-strain curves .Through comparing with the stress-strain curves of ordinary concrete and analyzing four aspects ：strain ,stress ,tangent slope and crack ,we get the whole process about stress-strain characteristics of plastic concrete .At the same time ,we study the regularity of stress-strain curves and find that the rising is in line with the Boltzmann model ,the declining is better with the Logistic model ,and the fitting degree is over ninety-five percent .Based on the mathematic model and through the study of the physical meaning of the model parame-ters ,they can reflect the basic characteristics of stress and strain .The results have reference significance to the test of elastic modulus of plastic concrete ,design ,construction and others .
出处
《南水北调与水利科技》
CAS
CSCD
北大核心
2014年第2期67-70,132,共5页
South-to-North Water Transfers and Water Science & Technology
基金
中央级公益性科研院所基本科研业务费专项资金项目(HKY-JBYW-2013-10)
