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Recommendations for numerical modelling of concentrically braced steel frames with gusset plate connections subjected to earthquake ground motion

Recommendations for numerical modelling of concentrically braced steel frames with gusset plate... AbstractConcentrically Braced Steel Frames (CBFs) are commonly used as an economic and effective means of resisting the lateral loading induced during earthquakes and limiting the associated displacements. Here, an integrated experimental and numerical approach is taken to investigate the performance of CBFs subjected to seismic action of varying intensity. As part of the BRACED transnational research project, shake table experiments on full-scale single-storey CBFs recorded the response of test frames employing various combinations of bracing member sizes and gusset plate connection details to simulated ground motions scaled to produce elastic response, brace buckling/yielding and ultimately brace fracture. This recorded experimental data is used to validate a numerical model developed using the OpenSees seismic response analysis software. Key experimental and numerical model responses are compared. The sensitivity of the model to variations in modelling parameters is assessed and recommendations for future numerical modelling are presented. Results indicate model performance is sensitive to the initial camber applied to the brace members, with a value of 0.8% of overall brace length observed to achieve a more accurate representation of global frame stiffness and drift response than the lower values previously recommended in literature, but an underestimate of the compression resistance of the brace. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Structural Integrity and Maintenance Taylor & Francis

Recommendations for numerical modelling of concentrically braced steel frames with gusset plate connections subjected to earthquake ground motion

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Recommendations for numerical modelling of concentrically braced steel frames with gusset plate connections subjected to earthquake ground motion

Abstract

AbstractConcentrically Braced Steel Frames (CBFs) are commonly used as an economic and effective means of resisting the lateral loading induced during earthquakes and limiting the associated displacements. Here, an integrated experimental and numerical approach is taken to investigate the performance of CBFs subjected to seismic action of varying intensity. As part of the BRACED transnational research project, shake table experiments on full-scale single-storey CBFs recorded the response of...
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Publisher
Taylor & Francis
Copyright
© 2017 Korea Institute for Structural Maintenance and Inspection
ISSN
2470-5322
eISSN
2470-5314
DOI
10.1080/24705314.2017.1354154
Publisher site
See Article on Publisher Site

Abstract

AbstractConcentrically Braced Steel Frames (CBFs) are commonly used as an economic and effective means of resisting the lateral loading induced during earthquakes and limiting the associated displacements. Here, an integrated experimental and numerical approach is taken to investigate the performance of CBFs subjected to seismic action of varying intensity. As part of the BRACED transnational research project, shake table experiments on full-scale single-storey CBFs recorded the response of test frames employing various combinations of bracing member sizes and gusset plate connection details to simulated ground motions scaled to produce elastic response, brace buckling/yielding and ultimately brace fracture. This recorded experimental data is used to validate a numerical model developed using the OpenSees seismic response analysis software. Key experimental and numerical model responses are compared. The sensitivity of the model to variations in modelling parameters is assessed and recommendations for future numerical modelling are presented. Results indicate model performance is sensitive to the initial camber applied to the brace members, with a value of 0.8% of overall brace length observed to achieve a more accurate representation of global frame stiffness and drift response than the lower values previously recommended in literature, but an underestimate of the compression resistance of the brace.

Journal

Journal of Structural Integrity and Maintenance – Taylor & Francis

Published: Jul 3, 2017

Keywords: Earthquake engineering; concentrically braced frames; time-history analysis; shake table testing

References

  • Earthquake testing and response analysis of concentrically-braced sub-frames
  • An algorithm for the machine calculation of complex Fourier series
  • Shake table testing of tubular steel bracing members
  • Validation of nonlinear time history analysis models for single-storey concentrically braced frames using full-scale shake table tests
  • Improved analytical model for special concentrically braced frames
  • Method of analysis for cyclic loaded R. C. Plane frame including changes in geometry and non-elastic behaviour of elements under combined normal force and bending
  • A balanced design procedure for special concentrically braced frame connections
  • Numerical simulation for steel brace members incorporating a fatigue model
  • Performance based design approach for multi-storey concentrically braced steel frames
  • Shake table assessment of gusset plate connection behaviour in concentrically braced frames
  • Model for cyclic inelastic buckling of steel braces
  • The use of fast Fourier transform for the estimation of power spectra: A method based on time averaging over short, modified periodograms