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利用大连理工大学海岸和近海工程国家重点实验室最新研制和改造的大型混凝土静、动三轴试验系统 ,进行了 6 4块普通混凝土试块在 4种常定侧应力等级和 4个数量级加载速率的混凝土双轴压试验 .系统地探讨了有侧应力作用时 ,混凝土在不同加载速率下的受压变形和强度特性 .在此基础上 ,建立了以应变和八面体应力空间表示的有恒定侧压混凝土在不同加载速率下的破坏准则 ,为地震区的混凝土结构、海上混凝土采油平台和核防御壳等结构受动态双轴压组合荷载作用的分析奠定了可靠的基础 .
Based on the large-scale static and dynamic triaxial test system newly developed and modified by the State Key Laboratory of Coastal and Offshore Engineering of Dalian University of Technology, 64 ordinary concrete test blocks were tested under four kinds of constant stress levels and four orders of magnitude loading rate , The compression and deformation of concrete under different loading rates are systematically investigated in this paper.On the basis of this, a method is proposed to calculate the compressive deformation and strength of concrete with constant stress and octahedral stress, The failure criterion of compressive concrete under different loading rates has laid a solid foundation for the analysis of combined dynamic loading under dynamic biaxial compression in concrete structures, offshore concrete platforms and nuclear defensive shells in the earthquake area.