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Numerical Simulation of a Reduced-Scale 4-Story Steel Moment-Resisting Frame Tested to Collapse
https://orcid.org/http://orcid.org/0009-0007-9810-2839
https://orcid.org/http://orcid.org/0000-0002-9254-8844
https://orcid.org/http://orcid.org/0000-0002-7866-9332
https://orcid.org/http://orcid.org/0009-0008-3104-6470
https://orcid.org/http://orcid.org/0000-0002-3841-2540
Numerical simulation was conducted to examine how closely recorded response of a shake-table test could be reproduced. The shake-table specimen was a 40%-scale, 4-story steel moment-resisting frame subjected to unidirectional excitation of JMA Kobe-NS record scaled from 10 to 100%. After repeated shaking, the specimen developed substantial yielding and fracture at multiple beam ends, and the first two stories developed story drift ratio exceeding 0.1 rad. A two-dimensional model of the specimen was constructed using OpenSees with the primary beams represented by force-based beam-column elements at ends and an elastic beam-column element in the middle. The fiber sections at the beam ends adopted a piecewise linear model with fatigue limits based on a linear cumulative damage rule. The material models were calibrated to reproduce the occurrence of local buckling and crack propagation observed in a beam-and-column subassemblage test. The numerical 4-story model was subjected continuously to the small to large ground motions recorded during the shake-table tests. In the first-round attempt, the simulated response agreed with the tests up to the first 100% motion. Although fatigue properties were introduced to the model, the simulated beams did not fracture but showed strength degradation due to local buckling.
Numerical Simulation of a Reduced-Scale 4-Story Steel Moment-Resisting Frame Tested to Collapse
https://orcid.org/http://orcid.org/0009-0007-9810-2839
https://orcid.org/http://orcid.org/0000-0002-9254-8844
https://orcid.org/http://orcid.org/0000-0002-7866-9332
https://orcid.org/http://orcid.org/0009-0008-3104-6470
https://orcid.org/http://orcid.org/0000-0002-3841-2540
Numerical simulation was conducted to examine how closely recorded response of a shake-table test could be reproduced. The shake-table specimen was a 40%-scale, 4-story steel moment-resisting frame subjected to unidirectional excitation of JMA Kobe-NS record scaled from 10 to 100%. After repeated shaking, the specimen developed substantial yielding and fracture at multiple beam ends, and the first two stories developed story drift ratio exceeding 0.1 rad. A two-dimensional model of the specimen was constructed using OpenSees with the primary beams represented by force-based beam-column elements at ends and an elastic beam-column element in the middle. The fiber sections at the beam ends adopted a piecewise linear model with fatigue limits based on a linear cumulative damage rule. The material models were calibrated to reproduce the occurrence of local buckling and crack propagation observed in a beam-and-column subassemblage test. The numerical 4-story model was subjected continuously to the small to large ground motions recorded during the shake-table tests. In the first-round attempt, the simulated response agreed with the tests up to the first 100% motion. Although fatigue properties were introduced to the model, the simulated beams did not fracture but showed strength degradation due to local buckling.
Numerical Simulation of a Reduced-Scale 4-Story Steel Moment-Resisting Frame Tested to Collapse
https://orcid.org/http://orcid.org/0009-0007-9810-2839
https://orcid.org/http://orcid.org/0000-0002-9254-8844
https://orcid.org/http://orcid.org/0000-0002-7866-9332
https://orcid.org/http://orcid.org/0009-0008-3104-6470
https://orcid.org/http://orcid.org/0000-0002-3841-2540
Numerical simulation was conducted to examine how closely recorded response of a shake-table test could be reproduced. The shake-table specimen was a 40%-scale, 4-story steel moment-resisting frame subjected to unidirectional excitation of JMA Kobe-NS record scaled from 10 to 100%. After repeated shaking, the specimen developed substantial yielding and fracture at multiple beam ends, and the first two stories developed story drift ratio exceeding 0.1 rad. A two-dimensional model of the specimen was constructed using OpenSees with the primary beams represented by force-based beam-column elements at ends and an elastic beam-column element in the middle. The fiber sections at the beam ends adopted a piecewise linear model with fatigue limits based on a linear cumulative damage rule. The material models were calibrated to reproduce the occurrence of local buckling and crack propagation observed in a beam-and-column subassemblage test. The numerical 4-story model was subjected continuously to the small to large ground motions recorded during the shake-table tests. In the first-round attempt, the simulated response agreed with the tests up to the first 100% motion. Although fatigue properties were introduced to the model, the simulated beams did not fracture but showed strength degradation due to local buckling.
Numerical Simulation of a Reduced-Scale 4-Story Steel Moment-Resisting Frame Tested to Collapse
Lecture Notes in Civil Engineering
Mazzolani, Federico M. (editor) / Piluso, Vincenzo (editor) / Nastri, Elide (editor) / Formisano, Antonio (editor) / Li, Jionghui (author) / Somarriba, Martin (author) / Okazaki, Taichiro (author) / Nagae, Takuya (author) / Matsui, Ryota (author)
International Conference on the Behaviour of Steel Structures in Seismic Areas ; 2024 ; Salerno, Italy
2024-07-03
10 pages
Article/Chapter (Book)
Electronic Resource
English
Shake-Table Collapse Tests of a Reduced-Scale, 4-Story Steel Moment-Resisting Frame
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