柔性落石防护系统丝束环形网拉–弯刚度协调模型

doi:10.13722/j.cnki.jrme.2022.0294

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Abstract Wire-ring nets，consisted of discrete wire bundles，are commonly used for flexible protection system in the field of rockfall disaster protection. The wire-ring nets? numerical models in existing research simplify the discrete wire-bundle section into a circular section with equivalent area，which can?t realize the equivalent tensile-bending stiffness of the ring section and is still difficult to accurately predict the failure of wire-ring nets. In this paper，a tensile-bending coordinated model was hereby established by introducing the tensile，bending stiffness correction factors and tensile-bending stiffness coordinated factor of the ring?s discrete wire-bundle section. The tensile tests of single rings and ring chains were carried out to determine the model parameters，and the failure mechanism of the wire-rings in contact area was revealed. The nets impact tests were further carried out，and the key indexes such as impact displacement，impact forces and ultimate bearing energy were analyzed，with relative error 3.0%，6.6% and 5.9% respectively. Compared to the existing area equivalent model，the ultimate capacity prediction accuracy of the new model can be increased by 20.4% in average. The tensile-bending coordinated model can predict the loading stiffness and failure accurately，which improves the design accuracy of flexible rockfall protection system.

Key words： protection engineering flexible rockfall protection wire-ring net；tensile-bending stiffness failure mechanism ultimate bearing capacity

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	Articles by authors
	JIN Yuntao1
	2
	YU Zhixiang1
	2
	3
	GUO Liping1
	2
	LUO Liru1
	2
	ZHANG Lijun1
	2
	LIAO Linxu1
	2

Cite this article:

JIN Yuntao1,2,YU Zhixiang1, et al. Tensile-bending stiffness coordinated model for wire-ring nets in flexible rockfall protection system[J]. , 2023, 42(3): 698-707.

URL:

http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0294 OR http://rockmech.whrsm.ac.cn/EN/Y2023/V42/I3/698

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