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 selfcentering
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 conventionalMRF will be costly and
disruptive after the design basis earthquake, and, not financially viable after the maximum
considered earthquake due to large residual drifts.
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 selfcentering
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 conventionalMRF will be costly and
disruptive after the design basis earthquake, and, not financially viable after the maximum
considered earthquake due to large residual drifts.
Original language | English |
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Pages (from-to) | 1797-1816 |
Number of pages | 20 |
Journal | Bulletin of Earthquake Engineering |
Volume | 11 |
Issue number | 5 |
Early online date | 5 Mar 2013 |
DOIs | |
Publication status | Published - 2013 |
Keywords
- self-centering
- post-tensioned
- seismic design
ASJC Scopus subject areas
- Civil and Structural Engineering