Mechanical Properties of Saturated Concrete Depending on the Strain Rate
Mechanical Properties of Saturated Concrete Depending on the Strain Rate
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DOI：
10.1016/j.proeng.2014.12.204
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
T. Kaji;C. Fujiyama
中科院分区：
文献类型：
--
作者：
T. Kaji;C. Fujiyama
本研究探讨混凝土中凝结水对混凝土结构断裂机制的影响。本文研究的重点是高应变率下混凝土孔隙内的水压力。首先，进行了不同应变率下含不同类型微孔结构的饱和圆柱试件的单轴压缩试验。饱和混凝土，特别是低水灰比的混凝土，抗压强度随应变率的增加而增加。其次，在不同应变率下进行了有、无钢筋矩形梁试件的弯曲试验。随着应变速率的增加，素混凝土和钢筋混凝土的抗拉强度增加。这些结果表明，混凝土结构的动态响应的影响，与含水量和微孔结构的材料的应变率相关性。
This study investigates the influence of condensed water in concrete on the fracture mechanism of a concrete structure. The focus of this study is water pressure in concrete pores under loading with a high strain rate. First, uniaxial compression tests of saturated cylinder specimens containing various types of micro pore structures were conducted with different strain rates. The saturated concretes, especially those of low water-cement ratios, increased compression strength with increasing strain rate. Second, bending tests of rectangular beam specimens with and without rebar were conducted with different strain rates. As the strain rate increased, plain concretes and reinforced concretes showed an increase in tensile strength. These results suggest that dynamic responses of concrete structures are influenced by the strain rate dependency of material that is correlated with water content and micro pore structure.