How sensitive are site effects and building response to extreme cold temperature? The case of the Grenoble’s (France) City Hall building
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In this paper, a simple analysis is done to explain the observed increase of resonance frequency of City-Hall building in Grenoble (France), a 12-story reinforced concrete building. This period corresponds also to the observed variation of the resonance frequency of the Grenoble’s sedimentary basin. The postulated hypothesis is that the frequency increase reflects the stiffness increase of the soil–structure system related to the cold period that hit Western Europe in 2012. To explore this hypothesis we have processed continuous recording during the early 2012 recorded at the roof level and at a close free-field accelerometric station. The variation of site effect is monitored by the horizontal-to-vertical spectral ratio of seismic noise, and the variation of apparent and system frequencies of the building by the random decrement technique. Apparent frequency is computed by deconvolution method between roof and basement. The maximum freezing penetration is 0.75 m and the horizontal relative motion stiffness of the foundation is strongly sensitive to the modification of the upper soil layer. The results suggest a variation (<1 %) larger than twice the standard deviation of the natural wandering of resonance frequency observed at City-Hall building for normal weather conditions, and question on the development of realistic models developed for the detection of damage and for the physical interpretation of such frequency variations observed in actual buildings.
KeywordsSoil–structure interaction Resonance frequency Random decrement technique Temperature effect Grenoble’s City-Hall building
This work has been supported by a grant from Labex OSUG@2020 (Investissements d’avenir – ANR10 LABX56) and by French Research National Agency (ANR) through RISKNAT program (Project URBASIS ANR-09-RISK-009). Data are provided by the French Accelerometric Network (http://www.rap.resif.fr) supported by a public grant overseen by the French national research agency (ANR) as part of the “Investissements d’Avenir” program (Reference: ANR-11-EQPX-0040) and the French Ministry of ecology, sustainable development and energy.
- Carslaw HS, Jaeger JC (1959) Conduction of heat in solids. Clarendon Press, OxfordGoogle Scholar
- Cole H (1973) On-line failure detection and damping measurement of aerospace structures by random decrement signatures. Technical Report NASA CR-2205Google Scholar
- Dunand F, Ait Meziane Y, Guéguen P, Chatelain JL, Guillier B, Ben Salem R, Hadid M, Hellel M, Kiboua A, Laouami N, Machane D, Mezouer N, Nour A, Oubaiche EH, Remas A (2004) Utilisation du bruit de fond pour l’analyse des dommages des bâtiments de Boumerdes suite au séisme du 21 mai 2003. Mém Serv Géol Alg 12:177–191Google Scholar
- Dunand F, Guéguen P, Bard PY, Rodgers J, Celebi M (2006) Comparison of the dynamic parameters extracted from weak, moderate and strong motion recorded in buildings. In: Proceedings of the first European conference on earthquake engineering and seismology 2006; Geneva, Switzerland, paper 1021Google Scholar
- Luco JE (1980) Soil–structure interaction and identification of structural models. In: Proceedings of the 2nd ASCE conference on civil engineering and nuclear power, vol 2, pp 1–31Google Scholar
- Nasser F, Li Z, Martin N, Guéguen P (2013) Automatic parameter setting of Random Decrement Technique for the estimation of building modal parameters. In: Proceedings of surveillance 7 international conference, Chartres (France), October 29–30, 2013Google Scholar
- Régnier J, Michel C, Bertrand E, Guéguen P (2013) Contribution of ambient vibration recordings (free-field and buildings) for post-seismic analysis: the case of the Mw 7.3 Martinique (French lesser Antilles) earthquake, November 29, 2007. Soil Dyn Earthq Eng 50:162–167. doi: 10.1016/j.soildyn.2013.03.007 CrossRefGoogle Scholar
- Stewart JP, Fenves GL (1998) System identification for evaluating soil–structure interaction effects in buildings from strong motion recordings. Earthq Eng Struct Dyn 27:869–885. doi: 10.1002/(SICI)1096-9845(199808)27:8<869:AID-EQE762>3.0.CO;2-9 CrossRefGoogle Scholar
- Yang ZJ, Dutta U, Xu G, Hazirbaba K (2010) Effects of permafrost and seasonally frozen ground on the seismic response of transportation infrastructure sites. Technical report # INE/AUTC 11.03, Alaska Department of Transportation ResearchGoogle Scholar