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Design rules, experimental evaluation, and fracture models for high-strength and stainless steel hourglass shape energy dissipation devices

Design rules, experimental evaluation, and fracture models for high-strength and stainless steel hourglass shape energy dissipation devices
Design rules, experimental evaluation, and fracture models for high-strength and stainless steel hourglass shape energy dissipation devices
Steel yielding hysteretic devices provide a reliable way to increase the energy dissipation capacity of structures under seismic loading. Steel cylindrical pins with hourglass shape bending parts (called web hourglass shape pins—WHPs) have been recently used as the energy dissipation system of posttensioned connections for self-centering steel moment-resisting frames. This work evaluates the cyclic behavior of WHPs made of high-strength steel and two grades of stainless steel, i.e., austenitic grade 304 and duplex. Design rules for WHPs are established using principles of mechanics. Twenty-six tests using different cyclic loading protocols and different WHP geometries were conducted. The tests showed that the WHPs have stable hysteretic behavior and high fracture capacity. WHPs made of duplex stainless steel have the most favorable and predictable performance for seismic applications. Two micromechanics-based fracture models, i.e., the void growth model and the stress-modified critical strain model, were calibrated and their parameters are provided for high-strength steel and the two types of stainless steel. The ability of the cyclic void growth model to predict fracture in WHPs under cyclic loading is also evaluated.
0733-9445
4041-4087
Vasdravellis, G.
14ff6f1a-7480-44bb-a346-c6af8353353c
Karavasilis, T.L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Uy, B.
2c1feab4-15b6-41fa-8b4d-3dc0bea6b444
Vasdravellis, G.
14ff6f1a-7480-44bb-a346-c6af8353353c
Karavasilis, T.L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Uy, B.
2c1feab4-15b6-41fa-8b4d-3dc0bea6b444

Vasdravellis, G., Karavasilis, T.L. and Uy, B. (2014) Design rules, experimental evaluation, and fracture models for high-strength and stainless steel hourglass shape energy dissipation devices. Journal of Structural Engineering, 140 (11), 4041-4087. (doi:10.1061/(ASCE)ST.1943-541X.0001014).

Record type: Article

Abstract

Steel yielding hysteretic devices provide a reliable way to increase the energy dissipation capacity of structures under seismic loading. Steel cylindrical pins with hourglass shape bending parts (called web hourglass shape pins—WHPs) have been recently used as the energy dissipation system of posttensioned connections for self-centering steel moment-resisting frames. This work evaluates the cyclic behavior of WHPs made of high-strength steel and two grades of stainless steel, i.e., austenitic grade 304 and duplex. Design rules for WHPs are established using principles of mechanics. Twenty-six tests using different cyclic loading protocols and different WHP geometries were conducted. The tests showed that the WHPs have stable hysteretic behavior and high fracture capacity. WHPs made of duplex stainless steel have the most favorable and predictable performance for seismic applications. Two micromechanics-based fracture models, i.e., the void growth model and the stress-modified critical strain model, were calibrated and their parameters are provided for high-strength steel and the two types of stainless steel. The ability of the cyclic void growth model to predict fracture in WHPs under cyclic loading is also evaluated.

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More information

Accepted/In Press date: 26 November 2013
e-pub ahead of print date: 28 May 2014
Published date: November 2014
Organisations: Infrastructure Group

Identifiers

Local EPrints ID: 401608
URI: http://eprints.soton.ac.uk/id/eprint/401608
ISSN: 0733-9445
PURE UUID: 62c2f321-ba0a-47f0-9225-3fd0a7e1f782
ORCID for T.L. Karavasilis: ORCID iD orcid.org/0000-0003-2553-5389

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Date deposited: 18 Oct 2016 15:39
Last modified: 15 Mar 2024 02:51

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Contributors

Author: G. Vasdravellis
Author: T.L. Karavasilis ORCID iD
Author: B. Uy

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