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NHESS | Articles | Volume 18, issue 11
Nat. Hazards Earth Syst. Sci., 18, 3045-3061, 2018
https://doi.org/10.5194/nhess-18-3045-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Nat. Hazards Earth Syst. Sci., 18, 3045-3061, 2018
https://doi.org/10.5194/nhess-18-3045-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 19 Nov 2018

Research article | 19 Nov 2018

Effects of the impact angle on the coefficient of restitution in rockfall analysis based on a medium-scale laboratory test

Yanhai Wang et al.
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Cited articles  
Agliardi, F. and Crosta, G. B.: High resolution three-dimensional numerical modelling of rockfalls, Int. J. Rock Mech. Min. Sci., 40, 455–471, 2003. 
Andrew, M. and Oldrich, H.: Theory and calibration of the Pierre 2 stochastic rock fall dynamics simulation program, Can. Geotech. J., 54, 18–30, 2017. 
Asteriou, P. and Tsiambaos, G.: Effect of impact velocity, block mass and hardness on the coefficients of restitution for rockfall analysis, Int. J. Rock Mech. Min. Sci., 106, 41–50, 2018. 
Asteriou, P., Saroglou, H., and Tsiambaos, G.: Geotechnical and kinematic parameters affecting the coefficients of restitution for rock fall analysis, Int. J. Rock Mech. Min. Sci., 54, 103–113, 2012. 
Azzoni, A., Drigo, E., Giani, G., Rossi, P., and Zaninetti, A.: In situ observation of rockfall analysis, in: Proceedings of the 6th international symposium on landslides, Christchurch, 307–314, 1992. 
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General laws regarding the effect of the impact angle on the coefficients of restitution occur regardless of the test scales and conditions. Increasing the impact angle results in a reduction of Rn, Rv and RE and causes an increase in Rt. The rotation plays an important role in the effect of the impact angle. A higher percentage of kinetic energy converted to rotational energy always induces a higher Rn and a lower Rt. The percentage can be associated with the impact angle and the rock sizes.
General laws regarding the effect of the impact angle on the coefficients of restitution occur...
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