摘要
为了研究高强再生混凝土单轴及常规三轴应力状态下的受压应力-应变全曲线特征,通过RMT-201完成43个Φ50 mm×100 mm圆柱体试验,分析了不同围压、不同再生粗骨料取代率对高强再生混凝土强度、峰值应变以及全曲线的影响,提出了高强再生混凝土应力-应变曲线本构方程.试验结果表明:高强再生混凝土试件破坏形态与普通混凝土类似,但再生骨料与普通骨料最后破坏形态差异较大;随着侧压力增大,再生混凝土峰值应力、峰值应变呈线性增长;单轴及常规三轴应力状态下,高强再生混凝土受压应力-应变全曲线形状与普通高强混凝土相似,但峰值应变具有较大增长.随着侧压力的增长,高强再生混凝土上升段变陡,下降段变得越来越平缓.
In order to investigate the stress-strain curves of high performance recycled concrete under uniaxial and conventional triaxial compression,the experiments of 43 cylinder with Φ50 mm×100 mm were conducted according to RMT-201.The effects of lateral pressure and recycled aggregate replacement ratio strength,strain peak and stress-strain curve were discussed to establish the constitutive equations.Test results show that the failure mode of high performance recycled concrete are similar to that of ordinary concrete,while the final failure mode of recycled aggregate is quite different with that of natural aggregate.As the lateral pressure increases,the peak stress and peak strain increase linearly.The shape of high performance compressive stress-stain curves under uniaxial and conventional triaxial compression is similar to that of ordinary concrete with great increase of peak strain.With the increase of lateral pressure,the ascending stage becomes more steep with more gentle decline of descending stage.
出处
《江苏大学学报（自然科学版）》
EI
CAS
北大核心
2011年第5期597-601,共5页
Journal of Jiangsu University：Natural Science Edition
基金
东南大学博士生国内访学基金资助项目(BSFX2009-03)
关键词
再生混凝土
高强
常规三轴
应力-应变全曲线
本构方程
recycled concrete
high-performance
conventional triaxial
stress-strain curve
constitutive equation
