High Fidelity Modeling of Cold-Formed Steel Single Lap Shear Screw Fastened Connections

Kalo, Rita

Publication:
High Fidelity Modeling of Cold-Formed Steel Single Lap Shear Screw Fastened Connections

dc.contributor.advisor	Kara D. Peterman
dc.contributor.author	Kalo, Rita
dc.contributor.department	University of Massachusetts Amherst
dc.contributor.department	Civil Engineering
dc.date	2024-03-28T20:20:42.000
dc.date.accessioned	2024-04-26T18:26:00Z
dc.date.available	2024-04-26T18:26:00Z
dc.date.submitted	February
dc.date.submitted	2019
dc.description.abstract	Cold-formed steel connections are commonly fastened using self-tapping self-drilling screws. The behavior of these connections can differ based on the screw manufacturer or the cold-formed steel product used, both of which have a large selection available for use in industry. Because of their popularity and the many possible variations of these connections, researchers have frequently tested screw connections to characterize their behavior. However, repeatedly conducting this type of experiment is time consuming and expensive. Therefore, the purpose of this work was to create finite element models that can successfully predict the behavior of single lap shear screw connections, a common connection type used in cold-formed steel framing. These models were created using the finite element program Abaqus/CAE. To validate these models, test results from Pham and Moen (2015) were used to compare the stiffness, strength, and failure mode of multiple connections. A parametric study is also conducted to determine the influence of contact parameters on the behavior of the model. The results showed that all models consistently had good agreement with the connection stiffness and that most of the models also had good agreement with the peak load and failure mode of the v tests. These results were also compared to the design equations available for screw connections from the American Iron and Steel Institute (AISI). This comparison revealed that the models are more successful at predicting screw connection behavior than AISI, and thus work is required to improve the accuracy of AISI’s design equations. The eventual goal of this work is to develop a procedure to build and validate models without requiring test data. This work continuing in the future can lead to recommendations to improve AISI’s design equations and to implement the behavior of the connections into large cold-formed steel framing models such as diaphragms or shear walls.
dc.description.degree	Master of Science in Civil Engineering (M.S.C.E.)
dc.identifier.doi	https://doi.org/10.7275/13482503
dc.identifier.orcid	N/A
dc.identifier.uri	https://hdl.handle.net/20.500.14394/33791
dc.relation.url	https://scholarworks.umass.edu/cgi/viewcontent.cgi?article=1781&context=masters_theses_2&unstamped=1
dc.source.status	published
dc.subject	finite element modeling
dc.subject	cold-formed steel
dc.subject	screw fastened connections
dc.subject	nonlinear penalty contact
dc.subject	American Iron and Steel Institute
dc.subject	fastener
dc.subject	Structural Engineering
dc.title	High Fidelity Modeling of Cold-Formed Steel Single Lap Shear Screw Fastened Connections
dc.type	openaccess
dc.type	article
dc.type	thesis
digcom.contributor.author	isAuthorOfPublication\|email:r.kalo@hotmail.com\|institution:University of Massachusetts Amherst\|Kalo, Rita
digcom.identifier	masters_theses_2/743
digcom.identifier.contextkey	13482503
digcom.identifier.submissionpath	masters_theses_2/743
dspace.entity.type	Publication