Chile is one of the most seismic countries in the world, the structures built in this country will be subjected to several large-scale earthquakes during their lifetime. Therefore, the main structural criterion in Chile is the seismic design. In February 27, 2010 Chile was struck by an earthquake of Mw 8.8 (a) (Now on it will be called 27F). In this event, great damage was observed in some industrial structures built with precast concrete, mostly on the ones which were funded in soils type III according to NCh 2369 Of2003. Moreover, the precast structures that included concrete cladding panels suffered from important damage especially on the connection with the main structure [1]. The general practice considered the cladding panels as non-structural elements; thus, they were frequently included in the structural models only as a permanent load. However, with the experience of the 2010 earthquake, we can see that these panels modify the response of the system, and their interaction with the main structure shall be carefully considered. A precast concrete warehouse built in Quilicura, Santiago de Chile was studied in this report. The dimensions of the building are 168 meters by 110 meters with a total area of 18480 m2. The warehouse is located at 400 km of the epicenter of the 27F earthquake and is placed in a type III soil according to NCh2369. The effects of the earthquake on the structure are analyzed by the design spectrum from the NCh2369 Of2003 (from now on “code spectrum”) and by the records in the nearest seismic station with similar soil characteristic, located in Maipu, Santiago, at 25 km distance of the warehouse (“site spectrum”). Spectral and non-linear analysis are performed to investigate the cause of the damages.
Il Cile è uno dei paesi più sismici del mondo, le strutture costruite in questo paese saranno soggette a numerosi terremoti su larga scala durante la loro vita. Pertanto, il principale criterio strutturale in Cile è la progettazione sismica. Il 27 febbraio 2010 il Cile è stato colpito da un terremoto di Mw 8,8 (a) (ora verrà chiamato 27F). In questo caso, è stato osservato un grande danno in alcune strutture industriali costruite con calcestruzzo prefabbricato, principalmente su quelle che sono state in terreni di tipo III secondo NCh 2369 del 2003. Inoltre, le strutture prefabbricate che includevano pannelli di rivestimento in calcestruzzo hanno subito danni importanti soprattutto per quanto riguarda il collegamento con la struttura principale [1]. La pratica generale ha considerato i pannelli di rivestimento come elementi non strutturali; pertanto, venivano spesso inclusi nei modelli strutturali solo come carico permanente. Tuttavia, con l'esperienza del terremoto del 2010, possiamo vedere che questi pannelli modificano la risposta del sistema e la loro interazione con la struttura principale deve essere attentamente considerata. In questo rapporto è stato studiato un magazzino di calcestruzzo prefabbricato con panelli esteriori costruito a Quilicura, Santiago del Cile. Le dimensioni dell'edificio sono 168 metri per 110 metri con una superficie totale di 18480 m2. Il magazzino si trova a 400 km dall'epicentro del terremoto del 27F ed è collocato in un terreno di tipo III secondo NCh2369. Gli effetti del terremoto sulla struttura sono analizzati dallo spettro progettuale del NCh2369 Of2003 (da ora in poi "spettro del codice") e dai record nella stazione sismica più vicina con caratteristiche del suolo simili, situata a Maipu, Santiago, a 25 km distanza del magazzino ("spettro del sito"). Vengono eseguite analisi spettrali e non lineari per indagare sulla causa del danno.
Non-linear analysis of an industrial reinforced concrete structure damaged during 2010 Chile earthquake
DELGADO ROMERO, DANIELA PAZ;MANCINI DE BARBIERI, FRANCO HUMBERTO
2018/2019
Abstract
Chile is one of the most seismic countries in the world, the structures built in this country will be subjected to several large-scale earthquakes during their lifetime. Therefore, the main structural criterion in Chile is the seismic design. In February 27, 2010 Chile was struck by an earthquake of Mw 8.8 (a) (Now on it will be called 27F). In this event, great damage was observed in some industrial structures built with precast concrete, mostly on the ones which were funded in soils type III according to NCh 2369 Of2003. Moreover, the precast structures that included concrete cladding panels suffered from important damage especially on the connection with the main structure [1]. The general practice considered the cladding panels as non-structural elements; thus, they were frequently included in the structural models only as a permanent load. However, with the experience of the 2010 earthquake, we can see that these panels modify the response of the system, and their interaction with the main structure shall be carefully considered. A precast concrete warehouse built in Quilicura, Santiago de Chile was studied in this report. The dimensions of the building are 168 meters by 110 meters with a total area of 18480 m2. The warehouse is located at 400 km of the epicenter of the 27F earthquake and is placed in a type III soil according to NCh2369. The effects of the earthquake on the structure are analyzed by the design spectrum from the NCh2369 Of2003 (from now on “code spectrum”) and by the records in the nearest seismic station with similar soil characteristic, located in Maipu, Santiago, at 25 km distance of the warehouse (“site spectrum”). Spectral and non-linear analysis are performed to investigate the cause of the damages.| File | Dimensione | Formato | |
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https://hdl.handle.net/10589/150547