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为了对混凝土结构进行合理和精确的分析,常常需要包括峰值以后部分的混凝土全应力应变曲线。由于素混凝土的单轴拉伸试验难做,所以有价值的资料不多,且仅有的资料还常常互相矛盾。在本次研究中,找出了一种方法,此法能得到一个可靠的包括峰值之后软化过程的素混凝土受拉的荷载——变形曲线。为了描述这个软化曲线的特征,本次试验测定了试件不同位置的应变,不同标距长度上的伸长量,并用放大镜测定了裂缝宽度。为了得到骨料大小,水灰比及骨料体积含量对全应力应变曲线影响的资料,使用了七种不同的配合比。本文还得出了描述混凝土受拉全过程曲线的公式。
In order to analyze the concrete structure reasonably and accurately, it is often necessary to include the full stress-strain curve of concrete after the peak value. Since uniaxial tensile testing of plain concrete is difficult to do, there is not much information available and the only information often contradictory. In this study, a method was found that gave a reliable load-deformation curve of a concrete-filled concrete including the post-peak softening process. In order to describe the characteristics of this softening curve, this test measures the strain at different locations of the specimen, the elongation at different gauge lengths, and the crack width with a magnifying glass. In order to obtain the aggregate size, water-cement ratio and aggregate volume content of the total stress-strain curve of the information, the use of seven different mix. The paper also draws a formula describing the whole process of concrete tension.