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Análisis de los efectos de la irregularidad en planta y esbeltez en el comportamiento sísmico de edificios

Authors: Trujillo Tamayo, Santiago Fernando;

Análisis de los efectos de la irregularidad en planta y esbeltez en el comportamiento sísmico de edificios

Abstract

Los eventos sísmicos producen efectos devastadores en la población, traduciéndose en pérdidas económicas y humanas que son atribuidos al colapso parcial o total de las obras civiles. Desde hace varias décadas se han plasmado gradualmente requisitos sismorresistentes en las normativas con el objeto de estimar la demanda sísmica, resistencia de la estructura y limitación del daño. La configuración geométrica e irregularidades tanto en planta como en altura afecta el comportamiento sísmico de la estructura, por ello se presenta los criterios de la Norma Europea, Norma Ecuatoriana de la Construcción, Reglamento Colombiano de Construcción Sismo Resistente y norma de Estados Unidos que penalizan las irregularidades mediante un coeficiente traduciéndose en un incremento de hasta un 25 por ciento en las fuerza sísmicas de diseño. La torsión es uno de los problemas que más daño genera en las edificaciones, generalmente causadas por una distribución irregular de los elementos resistentes al sismo, se definen dos edificaciones como casos de estudio que según los criterios del ASCE 7-10 (2010) y NSR-10 (2010) son consideradas como irregular torsional e irregular torsional extrema. Las edificaciones denominadas tipo A y B son analizadas cumpliendo los requisitos del Eurocódigo 8 (2004) empleando el software ETABS, se establece un análisis lineal elástico y diseño de los elementos estructurales para luego evaluar el desempeño sísmico mediante un análisis no lineal en el dominio del tiempo utilizando una selección de acelerogramas registrados del sismo de L’Aquila, Loma Prieta y un acelerograma artificial denominado RG160. Las edificaciones se someten sismos de diferente magnitud que corresponden a periodos de retorno de 100, 475 y 2500 años.

Seismic events produce devastating effects on the population, inducing economic and human losses that are attributed to the partial or total collapse of civil works. For several decades, seismic resistance requirements have been gradually reflected in regulations in order to estimate seismic demand, resistance of the structure and limitation of damage. The geometric configuration and irregularities both in plan and height affect the seismic behavior of the structure, for this reason the criteria of the European Standard, Ecuadorian Construction Norm, Colombian Construction Regulations and the United States Standard that penalize the irregularities through a coefficient inducing an increase of up to 25 percent in the design seismic forces. Torsion is one of the problems that cause the most damage to buildings, generally caused by an irregular distribution of the elements resistant to the earthquake. Two buildings are defined as case studies that according to the criteria of ASCE 7-10 (2010) and NSR -10 (2010) are considered as torsional irregular and extreme torsional irregular. The buildings named type A and B are analyzed in compliance with the requirements of Eurocode 8 (2004) using the ETABS software, an elastic linear analysis and design of the structural elements is established to then evaluate the seismic performance through a nonlinear analysis in the domain of the time using a selection of registered accelerograms of the L'Aquila, Loma Prieta earthquake and an artificial accelerogram called RG160. The buildings undergo earthquakes of different magnitudes that correspond to return periods of 100, 475 and 2500 years.

Country
Spain
Keywords

:Enginyeria civil [Àrees temàtiques de la UPC], irregularidad, Enginyeria sísmica, Earthquake engineering, torsión, Buildings -- Earthquake effects, planta, Edificis -- Efecte dels terratrèmols, Àrees temàtiques de la UPC::Enginyeria civil

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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