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Seismic design, modelling and assessment of self-centering steel frames using post-tensioned connections with web hourglass shape pins.

Seismic design, modelling and assessment of self-centering steel frames using post-tensioned connections with web hourglass shape pins.
Seismic design, modelling and assessment of self-centering steel frames using post-tensioned connections with web hourglass shape pins.
A new self-centering steel post-tensioned connection using web hourglass shape pins (WHPs) has been recently developed and experimentally validated. The connection isolates inelastic deformations in WHPs, avoids damage in other connection parts as well as in beams and columns, and eliminates residual drifts. WHPs do not interfere with the composite slab and can be very easily replaced without bolting or welding, and so, the connection enables non-disruptive repair and rapid return to building occupancy in the aftermath of a strong earthquake. This paper presents a simplified nonlinear model for the connection and the associated beams and columns that consists of nonlinear beam-column elements, and hysteretic and contact zero-length spring elements appropriately placed in the beam-column interface. The model was calibrated against experimental results and found to accurately simulate the connection behaviour. A prototype building was selected and designed as a conventional steel moment-resisting frame (MRF) according to Eurocode 8 or as a self-centering steel MRF (SC-MRF) using the connection with WHPs. Seismic analyses results show that the conventional MRF and the SC-MRF have comparable peak storey drifts, and highlight the inherent potential of the SC-MRF to eliminate damage in beams and residual drifts. The paper also shows that repair of damage in the conventional MRF will be costly and disruptive after the design basis earthquake, and, not financially viable after the maximum considered earthquake due to large residual drifts
1570-761X
1797-1816
Dimopoulos, A.I.
fff91efc-309b-43b2-a46d-930b334e6606
Karavasilis, T.L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Vasdravellis, G.
14ff6f1a-7480-44bb-a346-c6af8353353c
Uy, B.
2c1feab4-15b6-41fa-8b4d-3dc0bea6b444
Dimopoulos, A.I.
fff91efc-309b-43b2-a46d-930b334e6606
Karavasilis, T.L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Vasdravellis, G.
14ff6f1a-7480-44bb-a346-c6af8353353c
Uy, B.
2c1feab4-15b6-41fa-8b4d-3dc0bea6b444

Dimopoulos, A.I., Karavasilis, T.L., Vasdravellis, G. and Uy, B. (2013) Seismic design, modelling and assessment of self-centering steel frames using post-tensioned connections with web hourglass shape pins. Bulletin of Earthquake Engineering, 11 (5), 1797-1816. (doi:10.1007/s10518-013-9437-4).

Record type: Article

Abstract

A new self-centering steel post-tensioned connection using web hourglass shape pins (WHPs) has been recently developed and experimentally validated. The connection isolates inelastic deformations in WHPs, avoids damage in other connection parts as well as in beams and columns, and eliminates residual drifts. WHPs do not interfere with the composite slab and can be very easily replaced without bolting or welding, and so, the connection enables non-disruptive repair and rapid return to building occupancy in the aftermath of a strong earthquake. This paper presents a simplified nonlinear model for the connection and the associated beams and columns that consists of nonlinear beam-column elements, and hysteretic and contact zero-length spring elements appropriately placed in the beam-column interface. The model was calibrated against experimental results and found to accurately simulate the connection behaviour. A prototype building was selected and designed as a conventional steel moment-resisting frame (MRF) according to Eurocode 8 or as a self-centering steel MRF (SC-MRF) using the connection with WHPs. Seismic analyses results show that the conventional MRF and the SC-MRF have comparable peak storey drifts, and highlight the inherent potential of the SC-MRF to eliminate damage in beams and residual drifts. The paper also shows that repair of damage in the conventional MRF will be costly and disruptive after the design basis earthquake, and, not financially viable after the maximum considered earthquake due to large residual drifts

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More information

e-pub ahead of print date: 5 March 2013
Published date: October 2013
Organisations: Infrastructure Group

Identifiers

Local EPrints ID: 401612
URI: https://eprints.soton.ac.uk/id/eprint/401612
ISSN: 1570-761X
PURE UUID: dec3c482-0773-430a-9035-ff55539f1faa
ORCID for T.L. Karavasilis: ORCID iD orcid.org/0000-0003-2553-5389

Catalogue record

Date deposited: 19 Oct 2016 15:48
Last modified: 15 Jul 2019 20:00

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Contributors

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

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