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Strain rate effect of steel-concrete composite panel indented by a hemispherical rigid body

  • Zhao, Weiyi (Department of Civil Engineering, Qingdao University of Technology) ;
  • Wang, Lin (Beihang School, Beihang University) ;
  • Yang, Guotao (Department of Civil Engineering, Qingdao University of Technology) ;
  • Wang, Ziguo (Department of Civil Engineering, Qingdao University of Technology) ;
  • Gao, Zepeng (Department of Civil Engineering, Qingdao University of Technology) ;
  • Guo, Quanquan (School of Transportation Science and Engineering, Beihang University)
  • Received : 2019.12.12
  • Accepted : 2020.09.11
  • Published : 2020.09.25

Abstract

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.

Keywords

Acknowledgement

This work was supported by National Natural Science Foundation of China [grant numbers 52008219 and 51808308]. The supports are gratefully acknowledged.

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