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Finite Element Modelling and Parametric Analyses of a Long-span Pocket-type Rockfall Interceptive Cable-Net Structure

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Abstract

The paper presents finite element (FE) modelling and simulation of a newly developed rockfall protective cable-net structure in Japan, named the Long-span Pocket-type Rock-net (LPR). A reference case LPR was taken and its element-level laboratory tests and structure-level full-scale field tests conducted in the past were utilized for the calibration and verification of the numerical model exercised on the platform of the code LS-DYNA. The ultimate goal of this research is to shade lights to the targeted design guideline of LPRs. Therefore, deliberately, a simplified (equivalent) but yet rigorous approach has been adopted without going into interface-level detailing. Moreover, a number of confusions unaddressed by the state-of-the-art literatures regarding the effects of the changes in various impact load characteristic-parameters resulting into the same specified kinetic energy have been investigated using the FE model. Furthermore, an investigation on the performance of the existing energy dissipator installed in LPR and the scope of its future modification is discussed.

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Acknowledgements

We would like to acknowledge Daiichi Consultants Co., Kochi, Loyal Consultants Co., Kochi, Nihon Protect Co., Matsuyama and Besafe Consultants Co., Niigata Japan for the experimental results on LPR used in this paper. The first author would also like to express his gratitude to Associate Professor Dr. Nelson Lam from the University of Melbourne, Australia and Dr. Axel Volkwein from WSL, Switzerland for their kind email responses, useful suggestions and encouragements at times.

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Authors and Affiliations

  1. Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, 790-8577, Matsuyama, Japan

    Shanker Dhakal

  2. Department of Civil and Environmental Engineering, Ehime University, Matsuyama, Japan

    Netra Prakash Bhandary, Ryuichi Yatabe & Naoki Kinoshita

Authors
  1. Shanker Dhakal
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  2. Netra Prakash Bhandary
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  3. Ryuichi Yatabe
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  4. Naoki Kinoshita
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Corresponding author

Correspondence to Shanker Dhakal .

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Editors and Affiliations

  1. Geological Survey of Italy, ISPRA - Italian Institute for Environmen, Rome, Italy

    Claudio Margottini

  2. ICL - International Consortium on Landsl, Florence, Italy

    Paolo Canuti

  3. Kyoto University Uji-Campus, Uji, Kyoto, Japan

    Kyoji Sassa

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Dhakal, S., Bhandary, N.P., Yatabe, R., Kinoshita, N. (2013). Finite Element Modelling and Parametric Analyses of a Long-span Pocket-type Rockfall Interceptive Cable-Net Structure. In: Margottini, C., Canuti, P., Sassa, K. (eds) Landslide Science and Practice. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-31319-6_76

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