Study on static and dynamic stress–strain relationship of cement mortar material

Abstract

Stress–strain relationship of concrete materials proposed in the International Code (CEB-FIP1990) and the Chinese Code (GB50010-2002) of concrete structure design is used to describe the static deformation characteristics of cement mortar material. The model parameters are studied via the experimental data, and they show that the stress–strain relationship proposed by the two codes can well describe the deformation characteristic of cement mortar materials by adjustment of material parameters. Based on stress–strain relationship of cement mortar materials, herein, a uniaxial dynamic strength criterion is proposed to obtain the uniaxial dynamic stress–strain relationship. The dynamic experimental result of cement mortar materials in our previous reports confirms that the dynamic stress–strain relationship is able to describe the uniaxial dynamic mechanical characteristics of cement mortar materials. In addition, the dynamic stress–strain relationship is verified with dynamic experimental results of cement mortar materials in the literatures.