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| Titel |
Experimental, numerical and analytical modelling of a newly developed rockfall protective cable-net structure |
| VerfasserIn |
S. Dhakal, N. P. Bhandary, R. Yatabe, N. Kinoshita |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 12 ; Nr. 11, no. 12 (2011-12-07), S.3197-3212 |
| Datensatznummer |
250009826
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| Publikation (Nr.) |
 copernicus.org/nhess-11-3197-2011.pdf |
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| Zusammenfassung |
| An innovative configuration of pocket-type rockfall protective cable-net
structure, known as Long-span Pocket-type Rock-net (LPR), has been developed
in Japan. The global performance of the proposed system was initially
checked by the experimental (full-scale) modelling. Given the various
limitations of the physical experiments, particularly for the parametric
study to have a detailed understanding of the newly developed system, a
reliable and simplified method of numerical modelling is felt necessary.
Again, given the sophistication involved with the method of numerical
simulation, a yet simplified modelling approach may prove more effective. On
top of this background, this paper presents a three-tier modelling of a
design of LPR. After physical modelling, which has revealed that the
displacement response may be taken more vital for LPR performance, Finite
Element based numerical modelling is presented. The programme LS-DYNA is used
and the models are calibrated and verified with the element- and
structure-level experiments. Finally, a simple analytical modelling
consisting of the equivalently linear and elastic, lumped-mass, single-degree-of-freedom system,
capable of predicting the global displacement response, is proposed based on
the basic principles of conservation of linear momentum and energy. The
model is back-calculated and modified from the analyses of the verified
numerical model. |
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