A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Extraction of Bolt Shear Forces in Bolted Connections Using Finite Element Method
https://orcid.org/http://orcid.org/0000-0002-6138-3223
https://orcid.org/http://orcid.org/0000-0002-0804-0803
The CSA S16 and the AISC 360 standards, and various bolt shear studies, are consistent in their assumption that a uniform distribution of applied force exists for short-bolted connections. However, a recent study at McGill University on conventionally constructed braced frames (CCBFs) reported that the shear force was distributed nonuniformly between the bolt group even though the connections were short. Based on this finding, a better understanding of the bolt force distribution and the unbuttoning phenomenon is needed, as they are key to accurately estimating the bolt group's shear strength. This was achieved by using the finite element (FE) method to prepare the tools needed to identify the failure mode occurring in a bolted connection, and to extract the bolt shear forces in a bolted connection. The behaviour of single-bolted connections subjected to shear loading was first studied using FE models to understand the components of shear resistance. Another goal of this study was to compare multiple extraction methods to obtain the bolt shear force and to determine the most accurate method. It was found that the total force in a bolted connection is being transferred in different mechanisms. These mechanisms included pure shear on the bolt, mechanical interlock between the bolt and plate, and friction between the plates. It was also found that using the contact method provides the most accurate estimate of the bolt shear force for a single-bolted connection. The behaviour of multi-bolted connections subjected to shear loading was also studied to assess how the extraction methods used for single-bolted connections could be applied. In addition, failure indicators to capture net section fracture and bolt shear fracture in FE models of the multi-bolted connections were investigated. It was shown that the equivalent plastic strain (PEEQ) could accurately predict the initial onset of net section fracture. In contrast, comparing the bolt's demand and capacity curve can accurately predict the bolt shear fracture. Moreover, it was shown that extracting the bolt forces from FE models is a complex procedure with various methods available.
Extraction of Bolt Shear Forces in Bolted Connections Using Finite Element Method
https://orcid.org/http://orcid.org/0000-0002-6138-3223
https://orcid.org/http://orcid.org/0000-0002-0804-0803
The CSA S16 and the AISC 360 standards, and various bolt shear studies, are consistent in their assumption that a uniform distribution of applied force exists for short-bolted connections. However, a recent study at McGill University on conventionally constructed braced frames (CCBFs) reported that the shear force was distributed nonuniformly between the bolt group even though the connections were short. Based on this finding, a better understanding of the bolt force distribution and the unbuttoning phenomenon is needed, as they are key to accurately estimating the bolt group's shear strength. This was achieved by using the finite element (FE) method to prepare the tools needed to identify the failure mode occurring in a bolted connection, and to extract the bolt shear forces in a bolted connection. The behaviour of single-bolted connections subjected to shear loading was first studied using FE models to understand the components of shear resistance. Another goal of this study was to compare multiple extraction methods to obtain the bolt shear force and to determine the most accurate method. It was found that the total force in a bolted connection is being transferred in different mechanisms. These mechanisms included pure shear on the bolt, mechanical interlock between the bolt and plate, and friction between the plates. It was also found that using the contact method provides the most accurate estimate of the bolt shear force for a single-bolted connection. The behaviour of multi-bolted connections subjected to shear loading was also studied to assess how the extraction methods used for single-bolted connections could be applied. In addition, failure indicators to capture net section fracture and bolt shear fracture in FE models of the multi-bolted connections were investigated. It was shown that the equivalent plastic strain (PEEQ) could accurately predict the initial onset of net section fracture. In contrast, comparing the bolt's demand and capacity curve can accurately predict the bolt shear fracture. Moreover, it was shown that extracting the bolt forces from FE models is a complex procedure with various methods available.
Extraction of Bolt Shear Forces in Bolted Connections Using Finite Element Method
https://orcid.org/http://orcid.org/0000-0002-6138-3223
https://orcid.org/http://orcid.org/0000-0002-0804-0803
The CSA S16 and the AISC 360 standards, and various bolt shear studies, are consistent in their assumption that a uniform distribution of applied force exists for short-bolted connections. However, a recent study at McGill University on conventionally constructed braced frames (CCBFs) reported that the shear force was distributed nonuniformly between the bolt group even though the connections were short. Based on this finding, a better understanding of the bolt force distribution and the unbuttoning phenomenon is needed, as they are key to accurately estimating the bolt group's shear strength. This was achieved by using the finite element (FE) method to prepare the tools needed to identify the failure mode occurring in a bolted connection, and to extract the bolt shear forces in a bolted connection. The behaviour of single-bolted connections subjected to shear loading was first studied using FE models to understand the components of shear resistance. Another goal of this study was to compare multiple extraction methods to obtain the bolt shear force and to determine the most accurate method. It was found that the total force in a bolted connection is being transferred in different mechanisms. These mechanisms included pure shear on the bolt, mechanical interlock between the bolt and plate, and friction between the plates. It was also found that using the contact method provides the most accurate estimate of the bolt shear force for a single-bolted connection. The behaviour of multi-bolted connections subjected to shear loading was also studied to assess how the extraction methods used for single-bolted connections could be applied. In addition, failure indicators to capture net section fracture and bolt shear fracture in FE models of the multi-bolted connections were investigated. It was shown that the equivalent plastic strain (PEEQ) could accurately predict the initial onset of net section fracture. In contrast, comparing the bolt's demand and capacity curve can accurately predict the bolt shear fracture. Moreover, it was shown that extracting the bolt forces from FE models is a complex procedure with various methods available.
Extraction of Bolt Shear Forces in Bolted Connections Using Finite Element Method
Lecture Notes in Civil Engineering
Desjardins, Serge (editor) / Poitras, Gérard J. (editor) / El Damatty, Ashraf (editor) / Elshaer, Ahmed (editor) / Aram, Ahmad Bou (author) / Rogers, Colin A. (author)
Canadian Society of Civil Engineering Annual Conference ; 2023 ; Moncton, NB, Canada
Proceedings of the Canadian Society for Civil Engineering Annual Conference 2023, Volume 11 ; Chapter: 18 ; 225-238
2024-09-26
14 pages
Article/Chapter (Book)
Electronic Resource
English
Invisible elastic bolt model concept for finite element analysis of bolted connections
| Online Contents | 2007
| British Library Conference Proceedings | 1999