2026-04-13T03:07:53Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/3713782025-07-17T08:03:08Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Cabrera Velez, Esteban author González Drigo, José Ramón author Luzi, Guido author Vargas Alzate, Yeudy Felipe author Pujades Beneit, Lluís author 2018 Ambient vibration testing has become a useful tool to assess the operational conditions of any existing structure, and allows the engineers to maintain a continuous monitoring in order to check its structural health conditions. In this paper an experimental survey performed by means of an original interferometric technique applied on a real building damaged after the Mw 5.1, may 11th 2011, Lorca earthquake (southeast Spain) is presented and discussed. This interferometric technique, based on real aperture radar (RAR), allows an easy, non-invasive and contactless procedure to evaluate the dynamic response of a building excited by ambient vibration noise. Contemporaneously, a 3D computational model of the monitored structure has been developed and an equivalent non-linear static analysis has been performed. The capacity spectrum method and a specific fragility model were used in order to obtain a global damage index of the structure. A specific post process of the RAR output combined with the numerical analysis of the modelled structure should help to establish the damage condition of the building in the aforementioned specific post-earthquake scenario, in order to estimate the occupancy conditions. The results of the computational assessment are consistent with the observed damage and with the results of the experimental RAR survey. The consistency of the results allows considering the interferometric RAR technique as an interesting alternative, or, in any case, a complementary non-invasive prospecting tool to assess the structural health conditions in a post-earthquake scenario. This research has been partially funded by the Ministry of Economy and Competitiveness (Ministerio de Economía y Competitividad-MINECO) of the Spanish Government and by the European Regional Development Fund (FEDER) of the European Union (UE) through projects referenced as CGL2011-23621 and CGL2015-65913-P (MINECO/FEDER, UE). Mr. Esteban Cabrera, sponsored by the University of Azuay (UDA), obtained a scholarship from the Ministry of Higher Education, Science and Technology, SENESCYT, Government of Ecuador, for doctoral studies in the Earthquake Engineering program of the UPC-Barcelona Tech. Postprint (published version) Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Sismologia Àrees temàtiques de la UPC::Enginyeria civil::Materials i estructures Buildings -- Earthquake effects Ambient vibration Capacity spectrum Damage index Non-invasive Real aperture radar Edificis -- Efecte dels terratrèmols Real aperture radar: an interferometric technique to assess earthquake damaged structures