Next week: Mortazavi, 02-Feb-24, 12:20pm Central
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Ellad Tadmor
Feb 6, 2024, 5:59:35 PMFeb 6
to aem-solid...@umn.edu
AEM Mechanics Research Seminar
Tuesday 02-Feb-2024, 12:20pm Central
Prof. Pedram Mortazavi
Department of Civil, Environmental, and Geo- Engineering, University of Minnesota
Title: Resilient Eccentrically Braced Frames with Cast Steel Replaceable Modular Yielding Links – Design Concept, Experimental Validation, and Codification
Abstract: Modern societies have experienced urbanization at an unprecedented rate, which has increased the dependency of the public on the uninterrupted operation of our infrastructure. Therefore, protecting and enhancing the resilience of the built infrastructure under natural hazards is most relevant today. As such, the engineering community must shift towards incorporating more resilient structural systems in the design process, which aim to eliminate or minimize damage, loss of functionality, and downtime in the infrastructure after major natural hazards. As an example of this approach, this presentation provides an overview of the design and experimental validation of Eccentrically Braced Frames (EBFs) equipped with novel cast steel replaceable modular yielding links. The proposed cast steel links primarily aim to enhance the resilience of EBFs under earthquakes and eliminate undesirable failure modes, which are observed in EBFs with conventional and replaceable wide-flange links. In addition, cast steel links promote modular construction and simplify the design process of EBFs. The performance of the proposed yielding links is validated through thirteen large-scale quasi-static tests and twelve pseudo-dynamic hybrid simulations. The results of the experimental program demonstrated highly enhanced ductility and ultra-low-cycle fatigue life for the proposed links, achieving up to 0.21 radians of link rotation under the AISC loading protocol, while all other structural elements remained undamaged. Pseudo-dynamic hybrid simulations are incorporated to develop and validate a low-cost re-centering mechanism in EBFs to reduce their residual deformations and downtime after severe random loading histories such as earthquakes. In the end, design provisions are developed for EBFs designed with cast steel replaceable modular yielding links.
For more information, visit the AEM Mechanics Research Seminar website:
Tuesday 02-Feb-2024, 12:20pm Central
In-person: Room 402, Walter Library, University of Minnesota
Online: Webinar registration link
Department of Civil, Environmental, and Geo- Engineering, University of Minnesota
Title: Resilient Eccentrically Braced Frames with Cast Steel Replaceable Modular Yielding Links – Design Concept, Experimental Validation, and Codification
Abstract: Modern societies have experienced urbanization at an unprecedented rate, which has increased the dependency of the public on the uninterrupted operation of our infrastructure. Therefore, protecting and enhancing the resilience of the built infrastructure under natural hazards is most relevant today. As such, the engineering community must shift towards incorporating more resilient structural systems in the design process, which aim to eliminate or minimize damage, loss of functionality, and downtime in the infrastructure after major natural hazards. As an example of this approach, this presentation provides an overview of the design and experimental validation of Eccentrically Braced Frames (EBFs) equipped with novel cast steel replaceable modular yielding links. The proposed cast steel links primarily aim to enhance the resilience of EBFs under earthquakes and eliminate undesirable failure modes, which are observed in EBFs with conventional and replaceable wide-flange links. In addition, cast steel links promote modular construction and simplify the design process of EBFs. The performance of the proposed yielding links is validated through thirteen large-scale quasi-static tests and twelve pseudo-dynamic hybrid simulations. The results of the experimental program demonstrated highly enhanced ductility and ultra-low-cycle fatigue life for the proposed links, achieving up to 0.21 radians of link rotation under the AISC loading protocol, while all other structural elements remained undamaged. Pseudo-dynamic hybrid simulations are incorporated to develop and validate a low-cost re-centering mechanism in EBFs to reduce their residual deformations and downtime after severe random loading histories such as earthquakes. In the end, design provisions are developed for EBFs designed with cast steel replaceable modular yielding links.
For more information, visit the AEM Mechanics Research Seminar website:
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Ellad B. Tadmor, Ph.D.
Russell J. Penrose Professor
Department of Aerospace Engineering and Mechanics
University of Minnesota
https://dept.aem.umn.edu/~tadmor/
Russell J. Penrose Professor
Department of Aerospace Engineering and Mechanics
University of Minnesota
https://dept.aem.umn.edu/~tadmor/
Ellad Tadmor
Feb 6, 2024, 6:09:25 PMFeb 6
to aem-solid...@umn.edu
CORRECTION TO THE DATE -- The seminar is next week on Tuesday, 13-Feb-2024
---------- Forwarded message ---------
From: Ellad Tadmor <tad...@umn.edu>
Date: Tue, Feb 6, 2024 at 4:59 PM
Subject: Next week: Mortazavi, 02-Feb-24, 12:20pm Central
To: <aem-solid...@umn.edu>
From: Ellad Tadmor <tad...@umn.edu>
Date: Tue, Feb 6, 2024 at 4:59 PM
Subject: Next week: Mortazavi, 02-Feb-24, 12:20pm Central
To: <aem-solid...@umn.edu>
AEM Mechanics Research Seminar
Tuesday 13-Feb-2024, 12:20pm Central
Tuesday 13-Feb-2024, 12:20pm Central
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