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Title: Nonlinear behavior of controlled rocking steel-framed building systems with replaceable energy dissipating fuses
Author(s): Hall, Kerry S.; Eatherton, Matthew R.; Hajjar, Jerome F.
Subject(s): Seismic Performance
Seismic Design
Earthquake Resistant Structure
Self-Centering
Structural Fuses
Large-Scale Experiments
Abstract: This report summarizes the results of a parametric study of a controlled rocking seismic lateral resistance system that includes two steel braced frames linked by replaceable energy dissipating fuses that are engaged by controlled rocking behavior. The frames are post-tensioned vertically to the foundation so as to facilitate self-centering after rocking. The study was conducted using geometrically and materially nonlinear finite element analysis of a two-dimensional prototype of the structural system. In this study, the structure is subjected to a suite of far-field ground motions representing different hazard levels in the Western U.S. The characteristics of the structural fuses, which absorb energy through a combination of cyclic shear and localized flexure mechanisms, were based on experimental test results of steel slit shear panels and engineered cementitious composite shear panels. Three key parameters are investigated that affect the response. The first is the ratio, A/B, of the bay width of the braced frames as compared to the width of the shear fuses connecting the frames. The second is the overturning factor (OT), which is the ratio of the total resisting moment of the fuses and post-tensioning compared to the overturning forces in the design code. The third is the self-centering factor (SC), which is the ratio of restoring moment of PT to the resisting moment of the fuses. Based on the computational results, recommendations are made for appropriate ranges of values for each of these parameters for effective performance.
Issue Date: 2010-10
Date Updated: 10-28-2010
Publisher: Newmark Structural Engineering Laboratory. University of Illinois at Urbana-Champaign.
Series/Report: Newmark Structural Engineering Laboratory Report Series 026
Genre: Technical Report
Type: Text
Language: English
URI: http://hdl.handle.net/2142/17373
ISSN: 1940-9826
Publication Status: published or submitted for publication
Rights Information: Copyright held by the authors. All rights reserved.
Date Available in IDEALS: 2010-10-27


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