Damage Mechanisms of a Reinforced Concrete Rock-Shed Slab Impacted by Blocks
Publication: Journal of Structural Engineering
Volume 133, Issue 10
Abstract
In mountainous areas, accidental rock falls are common hazards, which can cause a lot of damage. The passive protection systems of roads are usually rock-shed galleries composed of reinforced concrete elements. In this paper, a new type of structure is presented. The main innovation, compared to conventional solutions, is to dissipate the impact energy directly into the reinforced concrete slab or into fuse supports, and no longer into a cushion layer. The dynamic phenomena, taking place during the impact of a block onto the slab, are analyzed by means of experiments on a one-third-scale model (slab of ) of a real structure. The results made it possible to validate the operating and repair principles of the structurally dissipation rock-shed and revealed that the slab is damaged by three main mechanisms: punching, bending, and surface level breaking below of the impacted zone. These three damage modes are analyzed by means of data resulting from the various experimental tests.
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Acknowledgments
The writers wish to thank the Tonello I.C. Office, designer of the Structurally Dissipating Rock-sheds, and the Léon Grosse Company for its support in the building of the slab. Sincere thanks are also extended to the Cete-Lyon Laboratory for its cooperation in strain gauges preparation and to “Setra” for its financial assistance.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 133 • Issue 10 • October 2007
Pages: 1426 - 1433
Copyright
© 2007 ASCE.
History
Received: Jun 29, 2005
Accepted: Apr 4, 2007
Published online: Oct 1, 2007
Published in print: Oct 2007
Notes
Note. Associate Editor: Abhinav Gupta
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