An analytical study on the effect of beams' impact on the stories of structure with attitude towards progressive collapse

By reviewing previous studies in the field of roof’s collapse, an efficient analytical method is required to simulate the impact mechanism and failure procedure. Hence, the purpose of present study is mainly to analyze the beams' impact. Consequently, upper and lower beams are considered to sur...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Ghasem Gorji Bandpey, Gholamreza Abdollahzadeh Darzi, Ali Rahmani Firozjaee
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2021
Materias:	steel structure beams’ impact concentrated mass kinetic and potential energy plastic hinge capacity displacement diagram secondary impact progressive collapse Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/a5c8ac0b7b894bfd80eca31934e16fbe
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:a5c8ac0b7b894bfd80eca31934e16fbe
record_format	dspace
spelling	oai:doaj.org-article:a5c8ac0b7b894bfd80eca31934e16fbe2021-11-08T15:54:19ZAn analytical study on the effect of beams' impact on the stories of structure with attitude towards progressive collapse2476-39772538-261610.22065/jsce.2019.159652.1727https://doaj.org/article/a5c8ac0b7b894bfd80eca31934e16fbe2021-03-01T00:00:00Zhttps://www.jsce.ir/article_85101_f3068b6775614110ca9fd4127fba0984.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616By reviewing previous studies in the field of roof’s collapse, an efficient analytical method is required to simulate the impact mechanism and failure procedure. Hence, the purpose of present study is mainly to analyze the beams' impact. Consequently, upper and lower beams are considered to survey the collision effects of upper beam’s equivalent concentrated mass to the lower beam’s midspan in a way that an initial impact caused by mass is taken into account. At first, the maximum bending moment at the midspan is calculated by assuming linear behavior and employing the relations which involves the kinetic energy of concentrated mass and potential energy of the lower beam. Then, studying a conventional steel frame demonstrates that the bending moment is about eight times greater than the bending moment capacity of lower beam, therefore it would lead to formation of a plastic hinge at the midspan. In continue, the mentioned relations are solved by using the equations of motion including inertial effect. The results are used to calculate velocity in different sections of lower beam. Subsequently, the equilibrium equation is employed in the middle of lower beam and a virtual hinge at an arbitrary section which is tending in a wave form to supports is considered. Due to mentioned assumptions by investigating hinge formation behavior, the time of hinge tendency to the supports is calculated. Additionally, displacement values along the lower beam are obtained. Finally, the diagrams and tables are represented by using the obtained equations and compared with the lower beam's displacement capacity. The results demonstrate that the lower beams will collapse due to the collision of concentrated mass of upper beam and progressive collapse occurs in lower stories. Finally, for more accuracy of present study, the effect of secondary impact of upper beam on the lower beam is considered.Ghasem Gorji BandpeyGholamreza Abdollahzadeh DarziAli Rahmani FirozjaeeIranian Society of Structrual Engineering (ISSE)articlesteel structurebeams’ impactconcentrated masskinetic and potential energyplastic hingecapacity displacement diagramsecondary impactprogressive collapseBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 8, Iss 1, Pp 173-192 (2021)
institution	DOAJ
collection	DOAJ
language	FA
topic	steel structure beams’ impact concentrated mass kinetic and potential energy plastic hinge capacity displacement diagram secondary impact progressive collapse Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	steel structure beams’ impact concentrated mass kinetic and potential energy plastic hinge capacity displacement diagram secondary impact progressive collapse Bridge engineering TG1-470 Building construction TH1-9745 Ghasem Gorji Bandpey Gholamreza Abdollahzadeh Darzi Ali Rahmani Firozjaee An analytical study on the effect of beams' impact on the stories of structure with attitude towards progressive collapse
description	By reviewing previous studies in the field of roof’s collapse, an efficient analytical method is required to simulate the impact mechanism and failure procedure. Hence, the purpose of present study is mainly to analyze the beams' impact. Consequently, upper and lower beams are considered to survey the collision effects of upper beam’s equivalent concentrated mass to the lower beam’s midspan in a way that an initial impact caused by mass is taken into account. At first, the maximum bending moment at the midspan is calculated by assuming linear behavior and employing the relations which involves the kinetic energy of concentrated mass and potential energy of the lower beam. Then, studying a conventional steel frame demonstrates that the bending moment is about eight times greater than the bending moment capacity of lower beam, therefore it would lead to formation of a plastic hinge at the midspan. In continue, the mentioned relations are solved by using the equations of motion including inertial effect. The results are used to calculate velocity in different sections of lower beam. Subsequently, the equilibrium equation is employed in the middle of lower beam and a virtual hinge at an arbitrary section which is tending in a wave form to supports is considered. Due to mentioned assumptions by investigating hinge formation behavior, the time of hinge tendency to the supports is calculated. Additionally, displacement values along the lower beam are obtained. Finally, the diagrams and tables are represented by using the obtained equations and compared with the lower beam's displacement capacity. The results demonstrate that the lower beams will collapse due to the collision of concentrated mass of upper beam and progressive collapse occurs in lower stories. Finally, for more accuracy of present study, the effect of secondary impact of upper beam on the lower beam is considered.
format	article
author	Ghasem Gorji Bandpey Gholamreza Abdollahzadeh Darzi Ali Rahmani Firozjaee
author_facet	Ghasem Gorji Bandpey Gholamreza Abdollahzadeh Darzi Ali Rahmani Firozjaee
author_sort	Ghasem Gorji Bandpey
title	An analytical study on the effect of beams' impact on the stories of structure with attitude towards progressive collapse
title_short	An analytical study on the effect of beams' impact on the stories of structure with attitude towards progressive collapse
title_full	An analytical study on the effect of beams' impact on the stories of structure with attitude towards progressive collapse
title_fullStr	An analytical study on the effect of beams' impact on the stories of structure with attitude towards progressive collapse
title_full_unstemmed	An analytical study on the effect of beams' impact on the stories of structure with attitude towards progressive collapse
title_sort	analytical study on the effect of beams' impact on the stories of structure with attitude towards progressive collapse
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2021
url	https://doaj.org/article/a5c8ac0b7b894bfd80eca31934e16fbe
work_keys_str_mv	AT ghasemgorjibandpey ananalyticalstudyontheeffectofbeamsimpactonthestoriesofstructurewithattitudetowardsprogressivecollapse AT gholamrezaabdollahzadehdarzi ananalyticalstudyontheeffectofbeamsimpactonthestoriesofstructurewithattitudetowardsprogressivecollapse AT alirahmanifirozjaee ananalyticalstudyontheeffectofbeamsimpactonthestoriesofstructurewithattitudetowardsprogressivecollapse AT ghasemgorjibandpey analyticalstudyontheeffectofbeamsimpactonthestoriesofstructurewithattitudetowardsprogressivecollapse AT gholamrezaabdollahzadehdarzi analyticalstudyontheeffectofbeamsimpactonthestoriesofstructurewithattitudetowardsprogressivecollapse AT alirahmanifirozjaee analyticalstudyontheeffectofbeamsimpactonthestoriesofstructurewithattitudetowardsprogressivecollapse
_version_	1718441595203747840

An analytical study on the effect of beams' impact on the stories of structure with attitude towards progressive collapse

Ejemplares similares