Cyclic behaviour of laterally skewed special moment frame connections having composite concrete slabs. Issue 2 (11th March 2021)

• Record Type: Journal Article
• Authors: Dominguez, Damaso; Prinz, Gary S.
• Is Part Of: Steel construction. Volume 14:Issue 2(2021)
• Page Start: 107
• Page End: 116
• Publication Date: 2021-03-11
• Subjects: steel connections -- composite action -- special moment frames -- skew -- RBS; Steel buildings -- Analysis and design -- Composite construction; Stahlhochbau -- Berechnungs‐ und Bemessungsverfahren -- Verbundbau; Building, Iron and steel -- Design and construction -- Periodicals; Steel, Structural -- Periodicals; Iron and steel bridges -- Design and construction -- Periodicals; Structural steel industry -- Europe -- Periodicals; 721.044714205
• DOI: 10.1002/stco.202000032
• Languages: English
• ISSNs: 1867-0520

Abstract

Abstract: This study presents a numerical investigation into the cyclic performance of skewed special moment frame (SMF) connections that include composite concrete slabs. The study uses advanced finite element simulations to investigate the behaviour of shallow (W14×), medium (W24×) and deep (W33×) steel column sections with three levels of beam skew (10, 20 and 30 degrees) for both bare‐steel and composite (steel‐concrete) construction. To account for complex torsional boundary conditions that may affect the skewed connection response, prequalification‐type analyses were conducted considering the middle storey of a three‐storey, two‐way moment frame configuration. In the analyses, all skewed configurations achieved at least 0.04 rad of connection rotation during the cyclic loading protocol prior to a 20 % reduction in moment capacity. When a composite concrete slab was added, column twisting and column flange yielding increased at large skew angles (30 degrees) during positive moment cycles.