Geotechnical and kinematic parameters affecting the coefficients of restitution for rock fall analysis

Asteriou, P; Saroglou, H; Tsiambaos, G

dc.contributor.author	Asteriou, P	en
dc.contributor.author	Saroglou, H	en
dc.contributor.author	Tsiambaos, G	en
dc.date.accessioned	2014-03-01T02:09:16Z
dc.date.available	2014-03-01T02:09:16Z
dc.date.issued	2012	en
dc.identifier.issn	13651609	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29787
dc.subject	Coefficient of restitution	en
dc.subject	Field test	en
dc.subject	Laboratory test	en
dc.subject	Rockfall analysis	en
dc.subject	Trajectory modeling	en
dc.subject.other	Coefficient of restitution	en
dc.subject.other	Field test	en
dc.subject.other	Laboratory test	en
dc.subject.other	Rockfalls	en
dc.subject.other	Trajectory modeling	en
dc.subject.other	Hammers	en
dc.subject.other	Hardness	en
dc.subject.other	Rock bursts	en
dc.subject.other	Kinematics	en
dc.subject.other	correlation	en
dc.subject.other	field method	en
dc.subject.other	geotechnical property	en
dc.subject.other	kinematics	en
dc.subject.other	laboratory method	en
dc.subject.other	numerical model	en
dc.subject.other	parameterization	en
dc.subject.other	rock mass response	en
dc.subject.other	rockfall	en
dc.subject.other	testing method	en
dc.title	Geotechnical and kinematic parameters affecting the coefficients of restitution for rock fall analysis	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ijrmms.2012.05.029	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ijrmms.2012.05.029	en
heal.publicationDate	2012	en
heal.abstract	This paper presents the results of laboratory and field tests regarding the determination of the parameters that influence the trajectory of falling blocks in rockfalls. Coefficients of restitution are considered to be critical parameters in rockfall modeling, but various definitions exist and there is no agreement on which one is more appropriate. In this research, the lamped-mass analysis method was used and coefficients of restitution were calculated using the kinematic definitions. The laboratory testing was performed using a number of common rocks found in Greece. The rock materials tested were characterized by different Schmidt hammer rebound hardness values while the mass of the falling blocks as well as the impact angle and the velocity were altered during the tests in order to estimate the effect of each parameter on the coefficients of restitution. The kinematic coefficient of restitution was compared to the normal coefficient of restitution and was found to be more appropriate when used in correlations. Impact angle was found to significantly affect the trajectory. Finally, a correlation between Schmidt hammer rebound hardness and kinematic coefficient of restitution is proposed whilst a method for estimating the normal coefficient of restitution is suggested including the impacts' angle effect. © 2012 Elsevier Ltd.	en
heal.publisher	ELSEVIER	en
heal.journalName	International Journal of Rock Mechanics and Mining Sciences	en
dc.identifier.doi	10.1016/j.ijrmms.2012.05.029	en
dc.identifier.volume	54	en
dc.identifier.spage	103	en
dc.identifier.epage	113	en