Preprints
https://doi.org/10.5194/nhess-2018-76
https://doi.org/10.5194/nhess-2018-76

  11 Jun 2018

11 Jun 2018

Review status: this discussion paper is a preprint. It has been under review for the journal Natural Hazards and Earth System Sciences (NHESS). The manuscript was not accepted for further review after discussion.

Study on Mechanical Properties and Dissipation Capacity of Ring Net in Passive Rockfall Barriers

Chengqing Liu1,2, Shuai Tian3, Chengjie Xu1, and Jingjin Yang1 Chengqing Liu et al.
  • 1School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
  • 2Key Laboratory of High-speed Railway Engineering Ministry of Education, Chengdu 610031, China
  • 3China Design Group Co., LTD., Nanjing, 210014, China

Abstract. Passive rockfall barriers are used to mitigate the danger of falling rock and debris on steep slopes. The barriers consist of different flexible components including steel beams, cables, braking elements and wire nets. The engineering design of the net is especially important because it is one of the primary energy consuming components of the system. Nets consisting of interwoven wire rings are widespread but can fail in practice. In this paper we investigate the energy dissipation capacity of a single ring under application of two point, four point and six point tensile loading. The correctness of the theoretical results is verified by experiments. A numerical model of the ring net for application in modelling flexible barriers is then presented. We examine different support boundary conditions and rockfall impact angles on barrier response. We find the release of boundary conditions can increase the overall flexibility of the ring net. As the impact angle increases, the impact energy of the rock on the ring net will experience a gradual decline. The derived energy dissipation formulas provide a theoretical basis for engineering rockfall barriers.

Chengqing Liu et al.

 
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Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Chengqing Liu et al.

Chengqing Liu et al.

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Short summary
we investigate the energy dissipation capacity of a single ring under different amount of tensile loading. A numerical model of the ring net for application in modelling flexible barriers is then presented.We find the release of boundary conditions can increase the overall flexibility of the ring net. As the impact angle increases, the impact energy of the rock will experience a gradual decline. The derived energy dissipation formulas provide a theoretical basis for engineering barriers.
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