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Collapse risk and residual drift performance of steel buildings using post-tensioned MRFs and viscous dampers in near-fault regions

Collapse risk and residual drift performance of steel buildings using post-tensioned MRFs and viscous dampers in near-fault regions
Collapse risk and residual drift performance of steel buildings using post-tensioned MRFs and viscous dampers in near-fault regions
The potential of post-tensioned self-centering moment-resisting frames (SC-MRFs) and viscous dampers to reduce the collapse risk and improve the residual drift performance of steel buildings in near-fault regions is evaluated. For this purpose, a prototype steel building is designed using different seismic-resistant frames, i.e.: moment-resisting frames (MRFs); MRFs with viscous dampers; SC-MRFs; and SC-MRFs with viscous dampers. The frames are modeled in OpenSees where material and geometrical nonlinearities are taken into account as well as stiffness and strength deterioration. A database of 91 near-fault, pulse-like ground motions with varying pulse periods is used to conduct incremental dynamic analysis (IDA), in which each ground motion is scaled until collapse occurs. The probability of collapse and the probability of exceeding different residual story drift threshold values are calculated as a function of the ground motion intensity and the period of the velocity pulse. The results of IDA are then combined with probabilistic seismic hazard analysis models that account for near-fault directivity to assess and compare the collapse risk and the residual drift performance of the frames. The paper highlights the benefit of combining the post-tensioning and supplemental viscous damping technologies in the near-source. In particular, the SC-MRF with viscous dampers is found to achieve significant reductions in collapse risk and probability of exceedance of residual story drift threshold values compared to the MRF.
1570-761X
1643-1662
Tzimas, A.
533c0c41-47d7-41d4-bae3-f5e2f337a5eb
Kamaris, G.
e9aa3462-ee01-4599-9926-3dade6f133d8
Karavasilis, T.L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Galassco, C.
970b13d7-eb4c-4f89-b8f5-3a3ef0b281b3
Tzimas, A.
533c0c41-47d7-41d4-bae3-f5e2f337a5eb
Kamaris, G.
e9aa3462-ee01-4599-9926-3dade6f133d8
Karavasilis, T.L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Galassco, C.
970b13d7-eb4c-4f89-b8f5-3a3ef0b281b3

Tzimas, A., Kamaris, G., Karavasilis, T.L. and Galassco, C. (2016) Collapse risk and residual drift performance of steel buildings using post-tensioned MRFs and viscous dampers in near-fault regions. Bulletin of Earthquake Engineering, 14 (6), 1643-1662. (doi:10.1007/s10518-016-9898-3).

Record type: Article

Abstract

The potential of post-tensioned self-centering moment-resisting frames (SC-MRFs) and viscous dampers to reduce the collapse risk and improve the residual drift performance of steel buildings in near-fault regions is evaluated. For this purpose, a prototype steel building is designed using different seismic-resistant frames, i.e.: moment-resisting frames (MRFs); MRFs with viscous dampers; SC-MRFs; and SC-MRFs with viscous dampers. The frames are modeled in OpenSees where material and geometrical nonlinearities are taken into account as well as stiffness and strength deterioration. A database of 91 near-fault, pulse-like ground motions with varying pulse periods is used to conduct incremental dynamic analysis (IDA), in which each ground motion is scaled until collapse occurs. The probability of collapse and the probability of exceeding different residual story drift threshold values are calculated as a function of the ground motion intensity and the period of the velocity pulse. The results of IDA are then combined with probabilistic seismic hazard analysis models that account for near-fault directivity to assess and compare the collapse risk and the residual drift performance of the frames. The paper highlights the benefit of combining the post-tensioning and supplemental viscous damping technologies in the near-source. In particular, the SC-MRF with viscous dampers is found to achieve significant reductions in collapse risk and probability of exceedance of residual story drift threshold values compared to the MRF.

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More information

Accepted/In Press date: 4 March 2016
e-pub ahead of print date: 18 March 2016
Published date: June 2016
Organisations: Infrastructure Group

Identifiers

Local EPrints ID: 401598
URI: http://eprints.soton.ac.uk/id/eprint/401598
ISSN: 1570-761X
PURE UUID: baee6dc0-a234-4579-a413-befa1cc82cae
ORCID for T.L. Karavasilis: ORCID iD orcid.org/0000-0003-2553-5389

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Date deposited: 18 Oct 2016 14:36
Last modified: 15 Mar 2024 02:51

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Contributors

Author: A. Tzimas
Author: G. Kamaris
Author: T.L. Karavasilis ORCID iD
Author: C. Galassco

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