Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Steel Frames Exposed to Severe Ground Motions: Use of Viscous Dampers and Buckling Restrained Braces to Dissipate Earthquake Induced Energy

Version 1 : Received: 23 January 2021 / Approved: 25 January 2021 / Online: 25 January 2021 (12:40:53 CET)

How to cite: Hansu, O.; Guneyisi, E.M. Steel Frames Exposed to Severe Ground Motions: Use of Viscous Dampers and Buckling Restrained Braces to Dissipate Earthquake Induced Energy. Preprints 2021, 2021010492 (doi: 10.20944/preprints202101.0492.v1). Hansu, O.; Guneyisi, E.M. Steel Frames Exposed to Severe Ground Motions: Use of Viscous Dampers and Buckling Restrained Braces to Dissipate Earthquake Induced Energy. Preprints 2021, 2021010492 (doi: 10.20944/preprints202101.0492.v1).

Abstract

This study addresses an alternative use of viscous dampers (VDs) associated with buckling restrained braces (BRBs) as the innovative seismic protection devices. For this, 4, 8 and 12 storey steel frames were designed with 6.5 m equal span length and 4 m storey height. Thereafter, the VDs and BRBs were placed over the height of each frame considering three different configurations. The structures were modeled using SAP2000 finite element program and evaluated by the nonlinear time history analyses subjected to the six natural accelerograms (1976 Gazlı, 1978 Tabas, 1987 Superstition Hills, 1992 Cape Mendocino, 1994 Northridge and 1999 Chi-Chi). The structural response of the structures with and without VDs and BRBs were studied in terms of variation in the displacement, interstorey drift, absolute acceleration, maximum base shear, time history of roof displacement. The results clearly indicated that the application of VDs and BRBs had remarkable improvement in the earthquake performance of the case study frames by reducing the local/global deformations in the main structural systems and satisfied the serviceability.

Subject Areas

innovative systems; ground motion; steel frame; nonlinear analysis; viscous damper

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