“…In addition, the geometry of the impactor head also plays an important role and may considerably affect the impact response of RC beams. In the previous impact tests, the impactor heads had various geometries including flat (Anil et al, 2016; Chen and May, 2009; Pham et al, 2018; Saatci and Vecchio, 2009; Yan et al, 2018; Yilmaz et al, 2014), wedge (Zhan et al, 2015), hemispherical (Adhikary et al, 2015; Chen and May, 2009; Fujikake et al, 2009; Zhao et al, 2017) and curved surface with different curvature radius (Kishi and Mikami, 2012; Kishi et al, 2002; Tachibana et al, 2010) as shown in Figure 5. The effects of various geometries of an impactor head on the impact behavior of RC beams have been investigated in the previous study (Li et al, 2019a).…”