Vulnerability of simple reinforced concrete buildings to damage by rockfalls |
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Authors: | Olga Mavrouli Jordi Corominas |
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Institution: | (1) Technical University of Catalonia, Campus Nord, Jordi Girona 1-3, D2, 08034 Barcelona, Spain |
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Abstract: | A procedure is presented for investigating the response of reinforced concrete buildings to rockfall impact. The method considers
a single rock hit on the basement columns, and it includes four steps: (a) calculation of the probability of a rock impact
on a member of the load-bearing system, taking into account the block size and the design of the structure; (b) evaluation
of the response of one or more structural elements to the hit based on element capacity; (c) in the case of structural element
failure, assessment of the robustness of the whole structural system, calculating the potential for progressive collapse;
and (d) calculation of a damage index (DI), which is the ratio of structural elements that fail to the total number of structural
elements. The proposed method is applied to a reinforced concrete building for a range of rockfall paths and intensities.
The analysis has been carried out for a 2-m-diameter block and velocities < 3.5 m/s. The possible damage range is found to
be highly variable, with DI values ranging from 0.01 to 1 depending on the impact location and block velocity. |
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