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Steel and Composite Structures
  Volume 36, Number 6, September25 2020, pages 703-710

Strain rate effect of steel-concrete composite panel indented by a hemispherical rigid body
Weiyi Zhao, Lin Wang, Guotao Yang, Ziguo Wang, Zepeng Gao and Quanquan Guo

    This paper presents numerical and theoretical investigations on the strain rate in steel-concrete composite (SC) panels under low-velocity impact of a hemispherical rigid body. Finite element analyses were performed on five specimens with different loading rates. The impact energy was kept constant to eliminate its influence by simultaneously altering the velocity and mass of the projectile. Results show that the strain rate in most parts of the specimens was low and its influence on bearing capacity and energy dissipation was limited in an average sense of space and time. Therefore, the strain rate effect can be ignored for the analyses of global deformation. However, the strain rate effect should be considered in local contact problems. Equations of the local strain and strain rate were theoretically derived.
Key Words
    steel-concrete composite panel; finite element analysis; low-velocity impact; strain rate; theoretical method
Weiyi Zhao, Guotao Yang, Ziguo Wang and Zepeng Gao: Department of Civil Engineering, Qingdao University of Technology, Qingdao 266033, Shandong, China
2Beihang School, Beihang University, Beijing 100191, China
Lin Wan: Beihang School, Beihang University, Beijing 100191, China
Quanquan Guo: School of Transportation Science and Engineering, Beihang University, Beijing 100191, China

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