CAJ | 학술논문

为了分析塑性混凝土的应力应变关系，设计了2组配合比浇筑18个圆柱体试件进行三轴试验，得到了试件的工程应力应变曲线。通过分析工程应力应变曲线的特性修正了工程应力应变曲线，并分析了不同配合比下塑性混凝土峰值应力、割线模量与围压的相关关系。结果表明：围压作用下的应力应变曲线在弹性阶段后表现出明显的应变硬化特征，随着应力的不断增加，应变增大，待应变增加到10－3左右后，应力基本保持不变，即没有峰值应力，并且应力应变曲线几乎没有下降段；通过面积修正法对试验数据进行修正，修正后的应力应变曲线比较符合实际；提出了三轴作用下应力应变曲线修正后上升段曲线的本构关系模型，拟合程度达到99．5％。
위료분석소성혼응토적응력응변관계，설계료2조배합비요축18개원주체시건진행삼축시험，득도료시건적공정응력응변곡선。통과분석공정응력응변곡선적특성수정료공정응력응변곡선，병분석료불동배합비하소성혼응토봉치응력、할선모량여위압적상관관계。결과표명：위압작용하적응력응변곡선재탄성계단후표현출명현적응변경화특정，수착응력적불단증가，응변증대，대응변증가도10－3좌우후，응력기본보지불변，즉몰유봉치응력，병차응력응변곡선궤호몰유하강단；통과면적수정법대시험수거진행수정，수정후적응력응변곡선비교부합실제；제출료삼축작용하응력응변곡선수정후상승단곡선적본구관계모형，의합정도체도99．5％。
For the relationship of the stress-strain of plastic concrete,we casted eighteen specimens to do the compressive strength test un-der triaxial,and then got the engineering stress-strain curves of the specimens. Through the analysis of the characteristics of engineering stress-strain curves,we analyzed the engineering characteristics of the stress-strain curves. The results show that the curves which in the elastic stage have strain hardening characteristics under triaxial,and no peak stress and the decline;we correct the date by area,the results of stress-strain curves after correcting accord with actual. At last,we put forward the constitutive model of the rising and the fitting degree reaches 99. 5%.