“…No degradation is observed in Haimson and Kim (1971), Royer-Carfagni and Salvatore (2000), Cattaneo and Labuz (2001), Xiao et al (2009Xiao et al ( , 2010, Fuenkajorn and Phueakphum (2010), Wang et al (2013Wang et al ( , 2015 and Ma et al (2013), as reported in Fig. 2.…”