Connections rigidity effect on probability of fracture in steel moment frames
Connections in steel moment frames are idealized in full pinned and full rigid conditions. Because with this assumption, in spite of real behavior of connection, real story drifts are less anticipated and maybe frame is designed without performance of bracing. There are several methods for modeling...
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Iranian Society of Structrual Engineering (ISSE)
2017
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oai:doaj.org-article:340e8979255f4dc68047cb196991d0bd2021-11-08T15:46:36ZConnections rigidity effect on probability of fracture in steel moment frames2476-39772538-261610.22065/jsce.2017.72237.1039https://doaj.org/article/340e8979255f4dc68047cb196991d0bd2017-08-01T00:00:00Zhttps://www.jsce.ir/article_44836_72de926e2b93579e1bd0b8b9b0694a79.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Connections in steel moment frames are idealized in full pinned and full rigid conditions. Because with this assumption, in spite of real behavior of connection, real story drifts are less anticipated and maybe frame is designed without performance of bracing. There are several methods for modeling actual behavior of semi rigid connections. In this method a connection with certain rigidity is modeled by a rotational spring with corresponding stiffness. This stiffness is achieved by certain formula. In other words, each percent of rigidity corresponds to one rotational spring stiffness. In this research in order to evaluate the real behavior of connection in analysis and designing process and fracture probability one frame including four stories and one bay with three types of connection has been modeled and designed in ETABS. Each model has an individual rigidity which is equal to 10, 75 and 90 percent. With respect to maximum drift and different PGA in roof, probabilities of low, medium, high and complete fracture were calculated. For this purpose, with applying different PGA to modeled frames, amounts of drift in the roof are achieved. Then these values are compared with given values in American code. Finally, investigation showed that when rigidity in frame connections increases, the probability of frame fracture decreases. In other words, fully rigid assumption of connection in analysis process leads to decreasing in real probability of fracture in frames which is a noticeable risk in building designing processes.Gholamreza AbdollahzadehEhsan ShabanzadehIranian Society of Structrual Engineering (ISSE)articlesteel moment frameconnection rigiditydriftpgafailure probabilityBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 4, Iss 2, Pp 139-147 (2017) |
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steel moment frame connection rigidity drift pga failure probability Bridge engineering TG1-470 Building construction TH1-9745 |
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steel moment frame connection rigidity drift pga failure probability Bridge engineering TG1-470 Building construction TH1-9745 Gholamreza Abdollahzadeh Ehsan Shabanzadeh Connections rigidity effect on probability of fracture in steel moment frames |
| description |
Connections in steel moment frames are idealized in full pinned and full rigid conditions. Because with this assumption, in spite of real behavior of connection, real story drifts are less anticipated and maybe frame is designed without performance of bracing. There are several methods for modeling actual behavior of semi rigid connections. In this method a connection with certain rigidity is modeled by a rotational spring with corresponding stiffness. This stiffness is achieved by certain formula. In other words, each percent of rigidity corresponds to one rotational spring stiffness. In this research in order to evaluate the real behavior of connection in analysis and designing process and fracture probability one frame including four stories and one bay with three types of connection has been modeled and designed in ETABS. Each model has an individual rigidity which is equal to 10, 75 and 90 percent. With respect to maximum drift and different PGA in roof, probabilities of low, medium, high and complete fracture were calculated. For this purpose, with applying different PGA to modeled frames, amounts of drift in the roof are achieved. Then these values are compared with given values in American code. Finally, investigation showed that when rigidity in frame connections increases, the probability of frame fracture decreases. In other words, fully rigid assumption of connection in analysis process leads to decreasing in real probability of fracture in frames which is a noticeable risk in building designing processes. |
| format |
article |
| author |
Gholamreza Abdollahzadeh Ehsan Shabanzadeh |
| author_facet |
Gholamreza Abdollahzadeh Ehsan Shabanzadeh |
| author_sort |
Gholamreza Abdollahzadeh |
| title |
Connections rigidity effect on probability of fracture in steel moment frames |
| title_short |
Connections rigidity effect on probability of fracture in steel moment frames |
| title_full |
Connections rigidity effect on probability of fracture in steel moment frames |
| title_fullStr |
Connections rigidity effect on probability of fracture in steel moment frames |
| title_full_unstemmed |
Connections rigidity effect on probability of fracture in steel moment frames |
| title_sort |
connections rigidity effect on probability of fracture in steel moment frames |
| publisher |
Iranian Society of Structrual Engineering (ISSE) |
| publishDate |
2017 |
| url |
https://doaj.org/article/340e8979255f4dc68047cb196991d0bd |
| work_keys_str_mv |
AT gholamrezaabdollahzadeh connectionsrigidityeffectonprobabilityoffractureinsteelmomentframes AT ehsanshabanzadeh connectionsrigidityeffectonprobabilityoffractureinsteelmomentframes |
| _version_ |
1718441647977529344 |