Evaluation of slip behaviour of self-locking modular steel connection. (October 2022)

• Record Type: Journal Article
• Authors: Nadeem, Gohar; Safiee, Nor Azizi; Bakar, Nabilah Abu; Karim, Izian Abd; Nasir, Noor Azline Mohd
• Is Part Of: Journal of constructional steel research. Volume 197(2022)
• Publication Date: 2022-10
• Subjects: Slip resistance -- Modular steel connection -- Finite element -- Inter modular connection; Steel, Structural -- Periodicals; Building, Iron and steel -- Periodicals; Acier de construction -- Périodiques; Construction métallique -- Périodiques; 624.1821
• DOI: 10.1016/j.jcsr.2022.107467
• Languages: English
• ISSNs: 0143-974X

Abstract

Abstract: Modular steel building (MSB) is an exceptional substitute for traditional on-site steel construction. Bolt hole tolerance is provided in inter-modular connections (IMC) to allow positioning of modules which causes a higher initial slip of bolted connection. This study proposes a new connection with a four-stage assembly procedure that omits the need for excess hole tolerance in bolted connections and provides higher initial stiffness. The performance of this proposed connection is evaluated using finite element analysis, which has been validated against the existing experimental data from the literature. An analytical study is conducted on two variants of the proposed connection, the first variant with bolts and the second variant with dowel pins, to evaluate the shear force-slip behaviour. The force-displacement curve of the proposed connection is compared with existing models of bolted connections. Results show that the connections with pretension force applied on bolts had good agreement with the traditional four-stage model for bolted connection. Equations provided by established design codes can predict the initial stiffness in IMCs. Highlights: A new connection with a three-stage assembly procedure that omits the need for excess hole tolerance is proposed. The slip behaviour of the proposed connection is evaluated using finite element analysis. Two variants of the proposed connection are evaluated; first with bolts and the second with dowel pins, to evaluate the shear force-slip behaviour. The use of dowel pins in connection can speed up the assembling and dissembling process of connections between modules providing higher initial slip under lateral force.