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本文通过试件的中心受拉试验,测定了砼的受拉应力-变形全曲线。部分试件还进行了反复荷载试验。试验中仔细观察了试件表面裂缝的开始和发展及其断离的全过程。文中给出峰值应变、弹性模量、波桑比、开裂时的应力和变形等主要性能指标,并提出了建议的应力-变形全曲线方程。
In this paper, the tensile stress-deformation curve of the crucible is measured by the center tensile test of the test piece. Some specimens were also subjected to repeated load tests. In the test, the beginning and development of the surface cracks of the test piece and the whole process of the break-off were carefully observed. The main performance indexes such as peak strain, elastic modulus, Poisson ratio, stress at cracking and deformation are given in this paper, and the proposed stress-deformation full-curve equation is proposed.