University of Illinois Urbana-Champaign

Nonlinear behavior of controlled rocking steel-framed building systems with replaceable energy dissipating fuses

Hall, Kerry S.; Eatherton, Matthew R.; Hajjar, Jerome F.

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https://hdl.handle.net/2142/17373

Description

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.
Issue Date
2010-10
Keyword(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.
Publisher
Newmark Structural Engineering Laboratory. University of Illinois at Urbana-Champaign.
Series/Report Name or Number
Newmark Structural Engineering Laboratory Report Series 026
ISSN
1940-9826
Type of Resource
text
Language
en
Permalink
http://hdl.handle.net/2142/17373
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Copyright held by the authors. All rights reserved.

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Report series highlights research conducted at the Newmark Structural Engineering Laboratory