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Journal of Undergraduate Research

Keywords

high yield-displacement frames, earthquake resistance, steel construction

College

Ira A. Fulton College of Engineering and Technology

Department

Civil and Environmental Engineering

Abstract

Since the early twentieth century, engineers have recognized the suitability of steel construction for design of earthquake resistant structures. Beginning in the 1990’s, building codes have provided specifications for seismic steel design that are intended to allow inelastic behavior while preventing catastrophic collapse (Hamberger, 2009). However, this inelastic response leads to permanent structural deformation which can require costly building repair or rehabilitation for continued use (Pettinga et al., 2007). A study conducted by Christopoulos and Pampanin (2004) proposes the use of a flexible secondary structural system to act in parallel with the main system in order to limit permanent deformation. The proposed secondary system is intended to remain elastic and provide additional stiffness once the primary system has yielded. Subsequent analytical work has confirmed that a dual structural system, with moment-resisting fames (MRFs) as a secondary system, might reduce residual drift by as much as 50% (Kiggins and Uang, 2006).

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