Seismic Assessment of Steel Moment Frames with Irregularity in Mass and Stiffness

Irregularity, consider to be one of the main reasons of buildings collapse in recent earthquakes. Irregularity also affects the seismic behavior and maximum capacity of structures. The effect of mass and stiffness irregularity was evaluated in this research using static and dynamic analysis. Three f...

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Autores principales:	Elahe Chabokan, Iman Faridmehr
Formato:	article
Lenguaje:	EN
Publicado:	Pouyan Press 2018
Materias:	irregular structure stiffness response spectrum analysis time history analysis Computer engineering. Computer hardware TK7885-7895
Acceso en línea:	https://doaj.org/article/65df7758a1c54282b7c4f38b8acbb093
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id	oai:doaj.org-article:65df7758a1c54282b7c4f38b8acbb093
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spelling	oai:doaj.org-article:65df7758a1c54282b7c4f38b8acbb0932021-11-11T11:51:42ZSeismic Assessment of Steel Moment Frames with Irregularity in Mass and Stiffness2588-695910.22115/cepm.2018.141604.1039https://doaj.org/article/65df7758a1c54282b7c4f38b8acbb0932018-10-01T00:00:00Zhttp://www.jcepm.com/article_82852_a4315e616bce9368f5c1ff787e67a687.pdfhttps://doaj.org/toc/2588-6959Irregularity, consider to be one of the main reasons of buildings collapse in recent earthquakes. Irregularity also affects the seismic behavior and maximum capacity of structures. The effect of mass and stiffness irregularity was evaluated in this research using static and dynamic analysis. Three frames with 5, 10 and 15 stories with a 20% and 50% increase in mass of the middle stories and a 20% and 50% decrease in the ground level and middle stories were investigated separately. Maximum drift, first mode period, mass participation coefficient, and base shear force were evaluated using a developed program in MATLAB and SAP2000 based on finite element method. The results showed that changes in mass and stiffness causes a maximum increase of shear force by 14% and 5% in short and tall frames respectively. Maximum drift and the longest period in short frame occurred when the stiffness of ground level was decreased by 50 percent. In addition, such irregularity causes around 85% increase in mass participation coefficient in both short and tall frames.Elahe ChabokanIman FaridmehrPouyan Pressarticleirregular structurestiffnessresponse spectrum analysistime history analysisComputer engineering. Computer hardwareTK7885-7895ENComputational Engineering and Physical Modeling, Vol 1, Iss 4, Pp 71-89 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	irregular structure stiffness response spectrum analysis time history analysis Computer engineering. Computer hardware TK7885-7895
spellingShingle	irregular structure stiffness response spectrum analysis time history analysis Computer engineering. Computer hardware TK7885-7895 Elahe Chabokan Iman Faridmehr Seismic Assessment of Steel Moment Frames with Irregularity in Mass and Stiffness
description	Irregularity, consider to be one of the main reasons of buildings collapse in recent earthquakes. Irregularity also affects the seismic behavior and maximum capacity of structures. The effect of mass and stiffness irregularity was evaluated in this research using static and dynamic analysis. Three frames with 5, 10 and 15 stories with a 20% and 50% increase in mass of the middle stories and a 20% and 50% decrease in the ground level and middle stories were investigated separately. Maximum drift, first mode period, mass participation coefficient, and base shear force were evaluated using a developed program in MATLAB and SAP2000 based on finite element method. The results showed that changes in mass and stiffness causes a maximum increase of shear force by 14% and 5% in short and tall frames respectively. Maximum drift and the longest period in short frame occurred when the stiffness of ground level was decreased by 50 percent. In addition, such irregularity causes around 85% increase in mass participation coefficient in both short and tall frames.
format	article
author	Elahe Chabokan Iman Faridmehr
author_facet	Elahe Chabokan Iman Faridmehr
author_sort	Elahe Chabokan
title	Seismic Assessment of Steel Moment Frames with Irregularity in Mass and Stiffness
title_short	Seismic Assessment of Steel Moment Frames with Irregularity in Mass and Stiffness
title_full	Seismic Assessment of Steel Moment Frames with Irregularity in Mass and Stiffness
title_fullStr	Seismic Assessment of Steel Moment Frames with Irregularity in Mass and Stiffness
title_full_unstemmed	Seismic Assessment of Steel Moment Frames with Irregularity in Mass and Stiffness
title_sort	seismic assessment of steel moment frames with irregularity in mass and stiffness
publisher	Pouyan Press
publishDate	2018
url	https://doaj.org/article/65df7758a1c54282b7c4f38b8acbb093
work_keys_str_mv	AT elahechabokan seismicassessmentofsteelmomentframeswithirregularityinmassandstiffness AT imanfaridmehr seismicassessmentofsteelmomentframeswithirregularityinmassandstiffness
_version_	1718439130957873152

Seismic Assessment of Steel Moment Frames with Irregularity in Mass and Stiffness

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