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三轴应力下再生粗骨料塑性混凝土的力学性能和破坏准则
Mechanical Properties and Failure Criteria of Recycled Plastic Concrete under Triaxial Stresses
投稿时间:2019-04-25  修订日期:2019-06-10
DOI:103969/j.issn1007 9629202002031
中文关键词:  再生塑性混凝土  应力应变  强度  破坏准则
英文关键词:recycled plastic concrete  stress strain  strength  failure criteria
基金项目:河南省自然科学基金资助项目(182300410254);水利部堤防与病害防治工程技术研究中心开放课题资助项目(2016A06)
        
作者单位
王四巍
WANG Siwei
华北水利水电大学岩土工程与水工结构研究院,河南郑州450046
Research Institute of Geotechnical Engineering and Hydraulic Structure, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
孙逢涛
SUN Fengtao
华北水利水电大学岩土工程与水工结构研究院,河南郑州450046
Research Institute of Geotechnical Engineering and Hydraulic Structure, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
吴华
WU Hua
中国兵器工业北方勘察设计研究院有限公司厦门分院,福建厦门361009
Xiamen Branch,China North Industries Norengeo Ltd., Xiamen 361009, China
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中文摘要:
      通过单轴、侧压相等和侧压不等三轴压缩试验,研究了再生粗骨料塑性混凝土(RPC)的应力应变强度特征,与原生粗骨料塑性混凝土(PC)性能进行了对比,并建立了基于空间八面体的强度破坏准则.结果表明:再生粗骨料塑性混凝土强度与围压的关系符合库伦破坏准则,其黏聚力低于原生粗骨料塑性混凝土,内摩擦角相差不大;再生粗骨料塑性混凝土应力应变曲线由单轴下应变软化转变为三轴下塑化,且侧压越大,理想塑化越明显;在3种试验下,试件均出现了最大体应变,且随着侧压的增加而增大;再生塑性混凝土抗裂性能高于原生粗骨料塑性混凝土,且随侧压增大而增强.
英文摘要:
      Compared with plastic concrete(PC), behavior of stress strain strength of recycled plastic concretes(RPC) was studied by uniaxial, conventional triaxial and true triaxial compression tests. The strength failure criterion based on spatial octahedron stress was established. The results show that the Coulomb failure criteria is applicable for recycled plastic concretes, while the cohesion is less than that of plastic concretes, the internal friction is similar. Failure modes change from strain softening under uniaxial stresses to strain plasticizing under triaxial stresses, and it is more ideally plasticizing with the more lateral pressures. The maximum volumetric strain occurs in the three kinds of tests, and it becomes higher with the lateral pressure. The crack resistance of recycled plastic concrete is higher than that of plastic concretes, and increases with lateral pressures.
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