Performance of extended end-plate bolted connections subjected to static and blast-like loads

Abstract In this study, numerical models were developed to predict the behavior of steel extended end-plate moment connections subjected to static and blast-like loading. Two types of extended end-plate connections were considered, stiffened, and unstiffened, with pretensioned bolts. The models were...

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Autores principales:	Ahmed A. Osman, Sherif A. Mourad
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Extended end-plate connection Finite element analysis Pretensioned bolts Blast load Pressure-impulse diagram Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/266e61346d2f4df5b77c04bace4d555e
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spelling	oai:doaj.org-article:266e61346d2f4df5b77c04bace4d555e2021-11-14T12:16:09ZPerformance of extended end-plate bolted connections subjected to static and blast-like loads10.1186/s44147-021-00001-31110-19032536-9512https://doaj.org/article/266e61346d2f4df5b77c04bace4d555e2021-09-01T00:00:00Zhttps://doi.org/10.1186/s44147-021-00001-3https://doaj.org/toc/1110-1903https://doaj.org/toc/2536-9512Abstract In this study, numerical models were developed to predict the behavior of steel extended end-plate moment connections subjected to static and blast-like loading. Two types of extended end-plate connections were considered, stiffened, and unstiffened, with pretensioned bolts. The models were verified by comparing the results with published experimental data. The models were used to compute the moment-rotation curves for the connection under static loading, and then under different blast durations. The pressure impulse diagram and the energy dissipation for the connection under dynamic loading were determined. The failure modes were examined, and the numerical results were compared with the simplified models presented in codes and standards. Improvement in the performance of the connection by adding one or two stiffeners was demonstrated. For the configuration studied, introducing a stiffener increased plastic dissipation energy for blast loading by 45% compared to the unstiffened connection, whereas under static loading, the plastic energy dissipation for stiffened connection, SC2, was higher than the unstiffened connection by 30%. A conservative estimate for the dynamic increase factor (DIF) was found to be 1.2 for steel yield stress and 1.05 for bolt failure.Ahmed A. OsmanSherif A. MouradSpringerOpenarticleExtended end-plate connectionFinite element analysisPretensioned boltsBlast loadPressure-impulse diagramEngineering (General). Civil engineering (General)TA1-2040ENJournal of Engineering and Applied Science, Vol 68, Iss 1, Pp 1-25 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Extended end-plate connection Finite element analysis Pretensioned bolts Blast load Pressure-impulse diagram Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Extended end-plate connection Finite element analysis Pretensioned bolts Blast load Pressure-impulse diagram Engineering (General). Civil engineering (General) TA1-2040 Ahmed A. Osman Sherif A. Mourad Performance of extended end-plate bolted connections subjected to static and blast-like loads
description	Abstract In this study, numerical models were developed to predict the behavior of steel extended end-plate moment connections subjected to static and blast-like loading. Two types of extended end-plate connections were considered, stiffened, and unstiffened, with pretensioned bolts. The models were verified by comparing the results with published experimental data. The models were used to compute the moment-rotation curves for the connection under static loading, and then under different blast durations. The pressure impulse diagram and the energy dissipation for the connection under dynamic loading were determined. The failure modes were examined, and the numerical results were compared with the simplified models presented in codes and standards. Improvement in the performance of the connection by adding one or two stiffeners was demonstrated. For the configuration studied, introducing a stiffener increased plastic dissipation energy for blast loading by 45% compared to the unstiffened connection, whereas under static loading, the plastic energy dissipation for stiffened connection, SC2, was higher than the unstiffened connection by 30%. A conservative estimate for the dynamic increase factor (DIF) was found to be 1.2 for steel yield stress and 1.05 for bolt failure.
format	article
author	Ahmed A. Osman Sherif A. Mourad
author_facet	Ahmed A. Osman Sherif A. Mourad
author_sort	Ahmed A. Osman
title	Performance of extended end-plate bolted connections subjected to static and blast-like loads
title_short	Performance of extended end-plate bolted connections subjected to static and blast-like loads
title_full	Performance of extended end-plate bolted connections subjected to static and blast-like loads
title_fullStr	Performance of extended end-plate bolted connections subjected to static and blast-like loads
title_full_unstemmed	Performance of extended end-plate bolted connections subjected to static and blast-like loads
title_sort	performance of extended end-plate bolted connections subjected to static and blast-like loads
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/266e61346d2f4df5b77c04bace4d555e
work_keys_str_mv	AT ahmedaosman performanceofextendedendplateboltedconnectionssubjectedtostaticandblastlikeloads AT sherifamourad performanceofextendedendplateboltedconnectionssubjectedtostaticandblastlikeloads
_version_	1718429335718723584

Performance of extended end-plate bolted connections subjected to static and blast-like loads

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