Experimental Study on Stress-Strain Curve of Concrete Considering Localized Failure in Compression
Experimental Study on Stress-Strain Curve of Concrete Considering Localized Failure in Compression
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DOI：
10.3151/jact.2.395
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发表时间：
2004
影响因子：
2
通讯作者：
Ken Watanabe;J. Niwa;H. Yokota;M. Iwanami
中科院分区：
文献类型：
--
作者：
Ken Watanabe;J. Niwa;H. Yokota;M. Iwanami
破坏局部化是影响混凝土受压应力-应变曲线的重要因素之一。混凝土的应力-应变曲线强烈地依赖于混凝土试件的高宽比，因此，唯一的应力-应变曲线不足以表示混凝土的软化行为。为了克服破坏局部化的问题，进行了一系列混凝土试件的单轴压缩试验。根据测量的能量分布，假设失效样本由2个或3个区域组成。在此基础上，建立了与各区域试验曲线相匹配的混凝土抗压强度包络线方程。将2个或3个考虑了各区域范围的公式组合起来，可以表示与高宽比无关的试件的实验应力-应变曲线。
One of the important factors for compressive stress-strain curves of concrete is the localization of failure. The stress-strain curve of concrete strongly depends on the aspect ratio of the concrete specimen; therefore, a unique stress-strain curve is not adequate to express the softening behavior of concrete. To overcome the problem related to the localization of failure, a series of uniaxial compressive tests of concrete specimens was conducted. From the measured energy distribution, the failed specimen was assumed to be composed of 2 or 3 zones. Then, an equation for an envelope curve involving a characteristic of compressive strength of concrete was formulated so as to match the experimental curve of each zone. Combining 2 or 3 proposed equations considering the extent of each zone could express the experimental stress-strain curve of the specimen regardless of the aspect ratio.