单向恒定侧压下混凝土动态抗压特性试验研究

利用大连理工大学自行研制、改造的大型液压伺服混凝土静动三轴试验系统对立方体试件进行一向恒定侧压的动态压缩试验。完成了四个侧向恒定压力等级的试验，应变速率变化范围为10-5~10-2 s-1。探讨了不同应变速率以及不同恒定侧压条件下混凝土强度与变形的变化规律。以试验数据为基础，在八面体应力空间中建立了适用于单向恒定侧压条件下混凝土双轴动态破坏的强度公式，为大坝、海上采油平台等大型混凝土结构的抗震安全分析提供了参考。

Experimental study on dynamic properties of concrete with one-dimensional confining pressure

Dynamic compressive tests on cubic specimens were carried out on the servo-hydraulic static-dynamic testing machine designed and manufactured at the Dalian University of Technology,China.The confining pressure was kept constant at four levels and the strain rate varied from 10-5 s-1 to 10-2 s-1.Variation of strength and deformation of concrete with strain rate and confining pressure was investigated systematically.Based on the tests results a strength formula was proposed for the dynamic failure of concrete with one-dimensional confining pressure,which will contribute to the seismic analysis of large-scale concrete structures such as dams,the offshore concrete oil platforms etc.