An analytical method for the impact force of a cubic rock boulder colliding onto a rigid barrier

Gang Luo, Yongjie Zhao, Weigang Shen () and Maolin Wu
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Gang Luo: Southwest Jiaotong University
Yongjie Zhao: Southwest Jiaotong University
Weigang Shen: Southwest Jiaotong University
Maolin Wu: Southwest Jiaotong University

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2022, vol. 112, issue 1, No 26, 603-618

Abstract: Abstract Rigid barriers can be destroyed by the impact of rock boulders in rockfalls, landslides and debris flows. An estimation for the maximum magnitude of the impact force is significant for the barrier design. Hence, a reliable and simple calculation method of the impact force of a known large boulder is urgently needed in practices. This study proposes a surface-surface calculation method, which considers the impact velocity, density and size of the rock boulder as well as the constitutive relation of rock, to estimate the maximum impact force. This method can take the elastic and plastic deformation and the fragmentation of the rock boulder into account. The experimental results meeting the surface-surface collision are used to verify the rationality of the model. The corresponding results can provide some new insights to the barrier design.

Keywords: Impact force; Rock boulder; Rigid barrier; Analytical method (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1007/s11069-021-05196-5

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