Investigation of ground motion vertical and horizontal component effects on the IDA curves for the regular and irregular steel moment frames

The effect of seismic vertical components on the seismic behavior of structural systems can be considerable. The vertical component of ground motion records can cause the brittle collapse of columns resulting in global collapse of structures. This effect is more crucial for near fault ground motions...

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Autores principales:	mehrdad talebzade zaviyeh, hamid saberi, vahid saberi, amin moshtagh
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2019
Materias:	seismic vertical component steel moment frame incremental dynamic analysis vertical irregularity seismic behavior Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/65e3e4ed389e44d1ac09ca65c86930b9
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id	oai:doaj.org-article:65e3e4ed389e44d1ac09ca65c86930b9
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spelling	oai:doaj.org-article:65e3e4ed389e44d1ac09ca65c86930b92021-11-08T15:52:34ZInvestigation of ground motion vertical and horizontal component effects on the IDA curves for the regular and irregular steel moment frames2476-39772538-261610.22065/jsce.2018.96337.1302https://doaj.org/article/65e3e4ed389e44d1ac09ca65c86930b92019-06-01T00:00:00Zhttps://www.jsce.ir/article_54782_24e63aa1b2d43b28ac2dc15cee31b8d1.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616The effect of seismic vertical components on the seismic behavior of structural systems can be considerable. The vertical component of ground motion records can cause the brittle collapse of columns resulting in global collapse of structures. This effect is more crucial for near fault ground motions with larger vertical accelerations. Nevertheless, the effect of seismic vertical excitations is neglected in time-history analysis procedures on common structural systems. This may results in unconservative results in dynamic analyses. Therefore, it is very important to evaluate the damaging effects of vertical component of seismic excitations. In this paper, the effect of vertical excitations on the seismic response of steel moment frames with regular and irregular configurations along the height. Incremental dynamic analysis is employed to consider the effect of seismic excitations with various intensities. In IDA analysis, the seismic loads are applied to the structures with increasing intensities. In this paper, the seismic loads are applied to the structures in two manners, once considering only the horizontal component and secondly considering vertical and horizontal components simultaneously. The IDA curves are compared for two cases to find the effect of vertical excitations on global seismic demands. Also, the evaluations are made separately for regular and irregular frames to find the effect of vertical irregularity. The observed results revealed that the vertical components may increase the nonlinear displacements, especially for large intensities. The investigations demonstrate that the increase of column axial forces causes brittle buckling of columns and expedites the formation of plastic hinges leading to global collapse of structure. In irregular frames with soft stories, the buckling of slender columns is more crucial than regular structures. Therefore, it is suggested that the vertical components are considered for analyzing steel moment frame structures against near fault ground motionsmehrdad talebzade zaviyehhamid saberivahid saberiamin moshtaghIranian Society of Structrual Engineering (ISSE)articleseismic vertical componentsteel moment frameincremental dynamic analysisvertical irregularityseismic behaviorBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 6, Iss شماره ویژه 1, Pp 113-126 (2019)
institution	DOAJ
collection	DOAJ
language	FA
topic	seismic vertical component steel moment frame incremental dynamic analysis vertical irregularity seismic behavior Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	seismic vertical component steel moment frame incremental dynamic analysis vertical irregularity seismic behavior Bridge engineering TG1-470 Building construction TH1-9745 mehrdad talebzade zaviyeh hamid saberi vahid saberi amin moshtagh Investigation of ground motion vertical and horizontal component effects on the IDA curves for the regular and irregular steel moment frames
description	The effect of seismic vertical components on the seismic behavior of structural systems can be considerable. The vertical component of ground motion records can cause the brittle collapse of columns resulting in global collapse of structures. This effect is more crucial for near fault ground motions with larger vertical accelerations. Nevertheless, the effect of seismic vertical excitations is neglected in time-history analysis procedures on common structural systems. This may results in unconservative results in dynamic analyses. Therefore, it is very important to evaluate the damaging effects of vertical component of seismic excitations. In this paper, the effect of vertical excitations on the seismic response of steel moment frames with regular and irregular configurations along the height. Incremental dynamic analysis is employed to consider the effect of seismic excitations with various intensities. In IDA analysis, the seismic loads are applied to the structures with increasing intensities. In this paper, the seismic loads are applied to the structures in two manners, once considering only the horizontal component and secondly considering vertical and horizontal components simultaneously. The IDA curves are compared for two cases to find the effect of vertical excitations on global seismic demands. Also, the evaluations are made separately for regular and irregular frames to find the effect of vertical irregularity. The observed results revealed that the vertical components may increase the nonlinear displacements, especially for large intensities. The investigations demonstrate that the increase of column axial forces causes brittle buckling of columns and expedites the formation of plastic hinges leading to global collapse of structure. In irregular frames with soft stories, the buckling of slender columns is more crucial than regular structures. Therefore, it is suggested that the vertical components are considered for analyzing steel moment frame structures against near fault ground motions
format	article
author	mehrdad talebzade zaviyeh hamid saberi vahid saberi amin moshtagh
author_facet	mehrdad talebzade zaviyeh hamid saberi vahid saberi amin moshtagh
author_sort	mehrdad talebzade zaviyeh
title	Investigation of ground motion vertical and horizontal component effects on the IDA curves for the regular and irregular steel moment frames
title_short	Investigation of ground motion vertical and horizontal component effects on the IDA curves for the regular and irregular steel moment frames
title_full	Investigation of ground motion vertical and horizontal component effects on the IDA curves for the regular and irregular steel moment frames
title_fullStr	Investigation of ground motion vertical and horizontal component effects on the IDA curves for the regular and irregular steel moment frames
title_full_unstemmed	Investigation of ground motion vertical and horizontal component effects on the IDA curves for the regular and irregular steel moment frames
title_sort	investigation of ground motion vertical and horizontal component effects on the ida curves for the regular and irregular steel moment frames
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2019
url	https://doaj.org/article/65e3e4ed389e44d1ac09ca65c86930b9
work_keys_str_mv	AT mehrdadtalebzadezaviyeh investigationofgroundmotionverticalandhorizontalcomponenteffectsontheidacurvesfortheregularandirregularsteelmomentframes AT hamidsaberi investigationofgroundmotionverticalandhorizontalcomponenteffectsontheidacurvesfortheregularandirregularsteelmomentframes AT vahidsaberi investigationofgroundmotionverticalandhorizontalcomponenteffectsontheidacurvesfortheregularandirregularsteelmomentframes AT aminmoshtagh investigationofgroundmotionverticalandhorizontalcomponenteffectsontheidacurvesfortheregularandirregularsteelmomentframes
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Investigation of ground motion vertical and horizontal component effects on the IDA curves for the regular and irregular steel moment frames

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