Seismic performance of self-centering steel plate shear walls with beam-only-connected web plates. (March 2015)

• Record Type: Journal Article
• Authors: Clayton, Patricia M.; Berman, Jeffrey W.; Lowes, Laura N.
• Is Part Of: Journal of constructional steel research. Volume 106(2015:Mar.)
• Page Start: 198
• Page End: 208
• Publication Date: 2015-03
• Subjects: Self-centering -- Post-tensioned connection -- Steel plate shear wall -- Numerical model -- Seismic performance; Steel, Structural -- Periodicals; Building, Iron and steel -- Periodicals; Acier de construction -- Périodiques; Construction métallique -- Périodiques; 624.1821
• DOI: 10.1016/j.jcsr.2014.12.017
• Languages: English
• ISSNs: 0143-974X

Abstract

Abstract: In the self-centering steel plate shear wall (SC-SPSW) system, thin steel web plates provide the primary lateral strength and energy dissipation, while post-tensioned connections in the boundary frame provide recentering and mitigate frame damage. In most steel plate shear walls (SPSWs), web plates are connected to the beams and columns; however, connecting the web plates to the beams only has been proposed as a means of reducing boundary frame demands and mitigating web plate damage. This paper investigates the impact of using beam-only-connected web plates on SC-SPSW design and seismic performance. Expressions for determining beam demands for purposes of design are developed. Three- and nine-story prototype SC-SPSWs are designed using beam-only-connected web plates and are compared with equivalent SC-SPSWs designs with fully-connected web plates. To evaluate the potential for material savings, the weight of steel required for each system is compared. The seismic performance of the SC-SPSWs with beam-only-connected and fully-connected web plates is compared using results of nonlinear response history analyses in which relatively simple, yet conservative, modeling techniques are employed. Highlights: Connecting web plates to only the beams reduces column demands in SC-SPSWs. Beam-only-connected web plates mitigate web plate damage in SC-SPSWs. Beam-only web plate SC-SPSWs used less steel than fully-connected web plate designs. SC-SPSWs with beam-only web plates meet all proposed seismic performance objectives.