南水北调与水利科技
南水北調與水利科技
남수북조여수리과기
SOUTH-TO-NORTH WATER
2014年
2期
67-70,132
,共5页
塑性混凝土%应力应变曲线%Boltzmann模型%Logistic模型%物理意义
塑性混凝土%應力應變麯線%Boltzmann模型%Logistic模型%物理意義
소성혼응토%응력응변곡선%Boltzmann모형%Logistic모형%물리의의
plastic concrete%stress-strain curve%Boltzmann model%Logistic model%physical meaning
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。
為瞭分析塑性混凝土應力應變關繫,共設計8組配閤比48箇試件,進行瞭瞭單軸抗壓試驗,得到瞭塑性混凝土典型的應力應變麯線。通過將其與常規混凝土應力應變關繫麯線進行對比,併從應變、應力、麯線切線斜率、裂縫4箇方麵進行分析,得到瞭塑性混凝土全過程的應力應變特性。研究髮現,塑性混凝土應力應變麯線上升段規律符閤Boltzmann模型,下降段規律符閤Logistic模型,其擬閤程度超過95%。結閤上升段和下降段的數學模型,通過研究給齣瞭模型參數的物理意義,可反映齣塑性混凝土應力應變的基本特性。研究成果對塑性混凝土彈性模量測試、設計、施工等工作具有參攷意義。
위료분석소성혼응토응력응변관계,공설계8조배합비48개시건,진행료료단축항압시험,득도료소성혼응토전형적응력응변곡선。통과장기여상규혼응토응력응변관계곡선진행대비,병종응변、응력、곡선절선사솔、렬봉4개방면진행분석,득도료소성혼응토전과정적응력응변특성。연구발현,소성혼응토응력응변곡선상승단규률부합Boltzmann모형,하강단규률부합Logistic모형,기의합정도초과95%。결합상승단화하강단적수학모형,통과연구급출료모형삼수적물리의의,가반영출소성혼응토응력응변적기본특성。연구성과대소성혼응토탄성모량측시、설계、시공등공작구유삼고의의。
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 .