Numerical Modelling of a Low-Energy Rockfall Barrier: New Insight into the Bullet Effect

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• 作者：A. Mentani ; A. Giacomini ; O. Buzzi ; L. Govoni…
• 关键词：Low ; energy rockfall barrier ; Double twist hexagonal mesh ; Full ; scale testing ; Dynamic non ; linear FE analysis ; Bullet effect
• 刊名：Rock Mechanics and Rock Engineering
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：49
• 期：4
• 页码：1247-1262
• 全文大小：5,198 KB
• 参考文献：Abaqus (2011) Abaqus Analysis User’s Manual. Version 6.11. Dassault Systémes Simulia Corp, Providence, RI
  Austroads (2010) Guide to Road Design Part 3: Geometric Design No. AGRD03/10, 295 pages
  Bertrand D, Nicot F, Gotteland P, Lambert S (2008) Discrete element method (DEM) numerical modeling of double-twisted hexagonal mesh. Can Geotech J 45(8):1104–1111. doi:10.​1139/​T08-036 CrossRef
  Bertrand D, Trad A, Limam A, Silvani C (2012) Full-scale dynamic analysis of an innovative rockfall fence under impact using the Discrete Element Method: from the local scale to the structure scale. Rock Mech Rock Eng 45(5):885–900. doi:10.​1007/​s00603-012-0222-5
  Bigot C, Berger F, Lambert S (2010) Treenet: an innovative type of rockfall protection fence on forested slopes specially designed for low energy events. In: Interpraevent 2010, International Symposium in Pacific Rim, Taipei (TWN), pp 366–371
  Boetticher A, Volkwein A, Wendeler C (2010) Numerical modelling of new rockfall interception nets. EGU Gen Assem 12(EGU2010-13754):2010
  Bourrier F, Bigot C, Bertrand D, Lambert S, Berger F (2010) A numerical model for the design of low energy rockfall protection nets. In: 3rd Euro mediterranean symposium on advances in geomaterials and structures (AGS2010), pp 407–412
  Bourrier F, Lambert S, Baroth J (2014) A reliability-based approach for the design of rockfall protection fences. Rock Mech Rock Eng 48(1):247–259. doi:10.​1007/​s00603-013-0540-2 CrossRef
  Buzzi O, Spadari M, Giacomini A, Fityus S, Sloan SW (2013) Experimental testing of rockfall barriers designed for the low range of impact energy. Rock Mech Rock Eng 46(4):701–712. doi:10.​1007/​s00603-012-0295-1 CrossRef
  Buzzi O, Leonarduzzi E, Krummenacher B, Volkwein A, Giacomini A (2015) Performance of high strength rockfall mesh: effect of block size and mesh geometry. Rock Mech Rock 48(3):1221–1231. doi:10.​1007/​s00603-014-0640-7 CrossRef
  Cantarelli G, Giani GP, Gottardi G, Govoni L (2008) Modelling rockfall protection fences. 1st World landslide forum, Tokyo, vol 18–21. ICL, Tokyo, pp 103–108
  Castro-Fresno D, del Coz Diaz JJ, Lopez LA, Garcia Nieto PJ (2008) Evaluation of the resistant capacity of cable nets using the finite element method and experimental validation. Eng Geol 100:1–10. doi:10.​1016/​j.​enggeo.​2008.​02.​007 CrossRef
  Cazzani A, Mongiovì L, Frenez T (2002) Dynamic finite element analysis of interceptive devices for falling rocks. Int J Rock Mech Min Sci 39(3):303–321. doi:10.​1016/​S1365-1609(02)00037-0 CrossRef
  de Miranda S, Gentilini C, Gottardi G, Govoni L, Mentani A, Ubertini F (2015) Virtual testing of existing semi-rigid rockfall protection barriers. Eng Struct 85:83–94. doi:10.​1016/​j.​engstruct.​2014.​12.​022 CrossRef
  Descoeudres F (1997) Aspects geomecaniques des instabilites de falaises rocheuses et des chutes de blocs. Societe Suisse de mecanique des sols et des roches 135:3–11
  Dhakal S, Bhandary NP, Yatabe R, Kinoshita N (2011) Experimental, numerical and analytical modelling of a newly developed rockfall protective cable-net structure. Nat Hazards Earth Syst Sci 11:3197–3212. doi:10.​5194/​nhess-11-3197-2011 CrossRef
  DISTART (2006) Certificato n. 571/06/01. Technical Report. University of Bologna
  EOTA (2008) Guideline for European technical approval of falling rock protection kits (ETAG 027), Brussels
  Escallon JP, Wendeler C, Chatzi E, Bartelt P (2014) Parameter identification of rockfall protection barrier components through an inverse formulation. Eng Struct 77:1–16. doi:10.​1016/​j.​engstruct.​2014.​07.​019 CrossRef
  Gentilini C, Govoni L, de Miranda S, Gottardi G, Ubertini F (2012) Three-dimensional numerical modelling of falling rock protection barriers. Comput Geotech 44:58–72. doi:10.​1016/​j.​compgeo.​2012.​03.​011 CrossRef
  Gentilini C, Gottardi L, Govoni L, Mentani A, Ubertini F (2013) Design of falling rock protection barriers using numerical models. Eng Struct 50:96–106. doi:10.​1016/​j.​engstruct.​2012.​07.​008 CrossRef
  Gottardi G, Govoni L (2010) Full-scale modelling of falling rock protection barriers. Rock Mech Rock Eng 43:261–274. doi:10.​1007/​s00603-009-0046-0 CrossRef
  Govoni L, de Miranda S, Gentilini C, Gottardi G, Ubertini F (2011) Modelling of falling rock protection barriers. Int J Phys Modell Geotech 11(4):126–137CrossRef
  Grassl H, Volkwein A, Bartelt P (2003) Experimental and numerical modelling of higly flexible rockfall protection barriers. In: Proceedings of 12th Panamerican conference on soil mechanics and geotechnical engineering. Cambridge, pp 2589–2594
  Hambleton J, Buzzi O, Giacomini A, Spadari M, Sloan SW (2013) Perforation of flexible rockfall barriers by normal block impact. Rock Mech Rock Eng 46(3):515–526. doi:10.​1007/​s00603-012-0343-x CrossRef
  Hearn G, Barrett RK, Henson HH (1995) Testing and modelling of two rockfall barriers. Transp Res Rec 1504:1–11
  Kane WF, Duffy JD (1993) Brugg low energy wire rope rockfall net field tests. Technical Research Report 93-01. Department of Civil Engineering, The University of the Pacific
  Lambert S, Bertrand D, Berger F, Bigot C (2009) Low energy rock-fall protection fences in forested areas: experiments and numerical modelling. In: International conference on structures under shock and impact (SUSI Congress 2009), pp 133–138
  Muraishi H, Samizo M, Sugiyama T (2005) Development of a flexible low energy rockfall protection fence. Q Rep RTRI 46(3):161–166CrossRef
  Peila D, Pelizza S, Sassudelli F (1998) Evaluation of rockfall restraining nets by full scale tests. Rock Mech Rock Eng 31(1):1–24CrossRef
  Peila D, Oggeri C, Baratono P (2006) Barriere paramassi a rete. Interventi e dimensionamento. Quaderni di studio e di documentazione—26. Associazione Georisorse ed Ambiente, Torino (in Italian)
  Sasiharan N, Muhunthan B, Badger TC, Shu S, Carradine DM (2006) Numerical analysis of the performance of wire mesh and cable net rockfall protection systems. Eng Geol 88:121–132. doi:10.​1016/​j.​enggeo.​2006.​09.​005 CrossRef
  Spadari M, Giacomini A, Buzzi O, Fityus S, Giani GP (2012a) In situ rockfall testing in New South Wales, Australia. Int J Rock Mech Min Sci 49:84–93. doi:10.​1016/​j.​ijrmms.​2011.​11.​013 CrossRef
  Spadari M, Giacomini A, Buzzi O, Hambleton J (2012b) Prediction of the bullet effect for rockfall barriers: a scaling approach. Rock Mech Rock Eng 45(2):131–144. doi:10.​1007/​s00603-011-0203-0 CrossRef
  Spadari M, Kardani M, De Carteret R, Giacomini A, Buzzi O, Fityus S, Sloan SW (2013) Statistical evaluation of rockfall energy ranges for different geological settings of New South Wales, Australia. Eng Geol 158:57–65. doi:10.​1016/​j.​enggeo.​2013.​03.​007 CrossRef
  Thoeni K, Lambert C, Giacomini A, Sloan SW (2013) Discrete modelling of hexagonal wire meshes with a stochastically distorted contact model. Comp Geotech 49:158–169. doi:10.​1016/​j.​compgeo.​2012.​10.​014 CrossRef
  Van Tran P, Maegawa K, Fukada S (2013) Experiments and dynamic finite element analysis of a wire-rope rockfall protective fence. Rock Mech Rock Eng 46:1183–1198. doi:10.​1007/​s00603-012-0340-0 CrossRef
  Volkwein A, Roth A, Gerber W, Vogel A (2009) Flexible rockfall barriers subjected to extreme loads. Struct Eng Int 19(3):327–332. doi:10.​2749/​1016866097889579​00 CrossRef
  Volkwein A, Schellenberg K, Labiouse V, Agliardi F, Berger F, Bourrier F, Dorren LKA, Gerber W, Jaboyedoff M (2011) Rockfall characterization and structural protection—a review. Nat Hazards Earth Syst Sci 11:2617–2651. doi:10.​5194/​nhess-11-2617-2011 CrossRef
  
• 作者单位：A. Mentani (1)
  A. Giacomini (2)
  O. Buzzi (2)
  L. Govoni (1)
  G. Gottardi (1)
  S. Fityus (2)
  
  1. DICAM-Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy
  2. Priority Research Centre for Geotechnical and Materials Modelling, The University of Newcastle, Callaghan, Australia
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geophysics and Geodesy
  Civil Engineering
  
• 出版者：Springer Wien
• ISSN：1434-453X

文摘

This paper investigates the dynamic response of low energy, semi-rigid rockfall barriers. The study is based on a FE model that reproduces the geometry, components and connections of the existing systems that were previously tested at The University of Newcastle. The mechanical behaviour of the relevant barrier components was calibrated from simple mechanical tests and the response of the assembled system, i.e. 2 m high, 15 m long rockfall barrier, was validated against of full-scale tests results. Following a satisfactory validation of the model, further dynamic non-linear analyses were conducted to investigate the dependence of the full system performance to the size of impacting blocks. Interestingly, the total failure energy was found to evolve non-monotonically with block size because of dynamic effects that seem to prevail for impact speeds in the range of 15–20 m/s. The study also highlights the complex effects of adding intermediate longitudinal cables to the system. An improvement of the barrier performance is observed for the large blocks but the bullet effect is exacerbated for small blocks.