Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM

In most of the structural blast-resistant designs and analysis single degree of freedom (SDOF) method is used. Generally, for this method flexural response of the structural members is considered but in axial loaded members, secondary moments (P-δ effects) are also very important. In the case of col...

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Autores principales:	Mohammad Esmaeil Nia Omran, Somayeh Mollaei
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2017
Materias:	sdof method axial force blast loads rc column ls-dyna software Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/51a86b2e10394bd8add1b6fba325eaf3
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spelling	oai:doaj.org-article:51a86b2e10394bd8add1b6fba325eaf32021-11-08T15:46:44ZEstimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM2476-39772538-261610.22065/jsce.2017.75048.1063https://doaj.org/article/51a86b2e10394bd8add1b6fba325eaf32017-11-01T00:00:00Zhttps://www.jsce.ir/article_45955_17bd83ee52d4c574e5d865adefcf58f2.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616In most of the structural blast-resistant designs and analysis single degree of freedom (SDOF) method is used. Generally, for this method flexural response of the structural members is considered but in axial loaded members, secondary moments (P-δ effects) are also very important. In the case of columns of building structures, which mostly bear significant axial loads, ignoring P-δ effects under lateral blast loading can be very risky. This paper describes a simple way for taking into account P-δ effects and also the effects of high strain rates (which is very important in severe dynamic loading) in SDOF analysis of reinforced concrete columns under simultaneous axial load and lateral blast loading. The resulting responses are compared with explicit finite element analysis using LS-DYNA hydro-code. Proposed SDOF equation of motion is numerically calculated and secondary moment and high strain rate effects are included within the calculation procedure. Secondary moments due to P-δ effects have been considered as equivalent lateral load and strain effects are introduced to the model by dynamic increasing factors for concrete and steel materials. Based on the main results, estimated response of RC column under blast loading using SDOF method has acceptable accuracy compared to LS-DYNA analysis results.Mohammad Esmaeil Nia OmranSomayeh MollaeiIranian Society of Structrual Engineering (ISSE)articlesdof methodaxial forceblast loadsrc columnls-dyna softwareBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 4, Iss 3, Pp 81-90 (2017)
institution	DOAJ
collection	DOAJ
language	FA
topic	sdof method axial force blast loads rc column ls-dyna software Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	sdof method axial force blast loads rc column ls-dyna software Bridge engineering TG1-470 Building construction TH1-9745 Mohammad Esmaeil Nia Omran Somayeh Mollaei Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM
description	In most of the structural blast-resistant designs and analysis single degree of freedom (SDOF) method is used. Generally, for this method flexural response of the structural members is considered but in axial loaded members, secondary moments (P-δ effects) are also very important. In the case of columns of building structures, which mostly bear significant axial loads, ignoring P-δ effects under lateral blast loading can be very risky. This paper describes a simple way for taking into account P-δ effects and also the effects of high strain rates (which is very important in severe dynamic loading) in SDOF analysis of reinforced concrete columns under simultaneous axial load and lateral blast loading. The resulting responses are compared with explicit finite element analysis using LS-DYNA hydro-code. Proposed SDOF equation of motion is numerically calculated and secondary moment and high strain rate effects are included within the calculation procedure. Secondary moments due to P-δ effects have been considered as equivalent lateral load and strain effects are introduced to the model by dynamic increasing factors for concrete and steel materials. Based on the main results, estimated response of RC column under blast loading using SDOF method has acceptable accuracy compared to LS-DYNA analysis results.
format	article
author	Mohammad Esmaeil Nia Omran Somayeh Mollaei
author_facet	Mohammad Esmaeil Nia Omran Somayeh Mollaei
author_sort	Mohammad Esmaeil Nia Omran
title	Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM
title_short	Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM
title_full	Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM
title_fullStr	Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM
title_full_unstemmed	Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM
title_sort	estimation of rc columns’ response under the effect of lateral blast loading by sdof method and comparison with fem
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2017
url	https://doaj.org/article/51a86b2e10394bd8add1b6fba325eaf3
work_keys_str_mv	AT mohammadesmaeilniaomran estimationofrccolumnsresponseundertheeffectoflateralblastloadingbysdofmethodandcomparisonwithfem AT somayehmollaei estimationofrccolumnsresponseundertheeffectoflateralblastloadingbysdofmethodandcomparisonwithfem
_version_	1718441659898789888

Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM

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