新-老混凝土本构关系试验研究

Experimental Research on the Stress-Strain Curves of New-Old Concrete

通过老混凝土、新-老混凝土、高性能快速修补混凝土的全过程受压试验,测得了它们的应力-应变全曲线,并进行了比较.试验结果表明:这三种混凝土的变形能力是基本一致的.提出了上述3种混凝土的应力-应变全曲线的统一数学表达式,且理论曲线与试验曲线吻合较好.

The fullrange compression tests of old concrete, newold concrete and highperformance rapid repair concrete(HPRRC) prisms were completed. The complete stressstrain curves of HPRRC with PFAC, old concrete, newold concrete were obtained and compared. The essential consistent displacement of stressstrain curves of the three types of concrete were verified with experimental results. At same time the unified numerical expressions of the stressstrain curve of the three types of concrete are put forward, theoretical curves from calculation are in good agreement with experimental curves.