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G.S. Kamaris¹, A.S. Tzimas¹, T.L. Karavasilis¹ and C. Galasso²

¹School of Engineering, University of Warwick, Coventry, United Kingdom
²Department of Civil, Environmental and Geomatic Engineering and Institute for Risk and Disaster Reduction, University College London, United Kingdom

doi:10.4203/ccp.108.85

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G.S. Kamaris, A.S. Tzimas, T.L. Karavasilis, C. Galasso, "Collapse Risk of Self-Centering Moment Resisting Frames with Viscous Dampers in Near-Fault Regions", in J. Kruis, Y. Tsompanakis, B.H.V. Topping, (Editors), "Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 85, 2015. doi:10.4203/ccp.108.85

Keywords: self-centering, post-tensioned, steel frames, dampers, collapse, nearfault, seismic hazard analysis, seismic risk.

Summary

This paper evaluates the seismic collapse capacity of self-centering moment-resisting frames (SC-MRFs) with viscous dampers located in near-fault regions. For this purpose, a prototype steel building was designed using different seismic-resistant frames, i.e.: conventional steel 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 cyclic strength and stiffness degradation. A database of 91 near-fault, pulse-like ground motions with varying pulse periods is employed for the nonlinear dynamic analyses. Collapse capacity of the frames is evaluated through incremental dynamic analysis (IDA). The results of the IDA are combined with probabilistic seismic hazard analysis models that account for near-fault directivity to assess collapse risk of the structures. Results show that the predicted collapse capacity is affected by the pulse period of the near-fault ground motions and highlight that SC-MRFs have superior collapse resistance. Finally, it is shown that the use of viscous dampers significantly improves collapse resistance of all types of frames examined herein.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 108 PROCEEDINGS OF THE FIFTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: J. Kruis, Y. Tsompanakis and B.H.V. Topping Paper 85 Collapse Risk of Self-Centering Moment Resisting Frames with Viscous Dampers in Near-Fault Regions G.S. Kamaris¹, A.S. Tzimas¹, T.L. Karavasilis¹ and C. Galasso² ¹School of Engineering, University of Warwick, Coventry, United Kingdom ²Department of Civil, Environmental and Geomatic Engineering and Institute for Risk and Disaster Reduction, University College London, United Kingdom doi:10.4203/ccp.108.85 purchase the full-text of this paper Full Bibliographic Reference for this paper G.S. Kamaris, A.S. Tzimas, T.L. Karavasilis, C. Galasso, "Collapse Risk of Self-Centering Moment Resisting Frames with Viscous Dampers in Near-Fault Regions", in J. Kruis, Y. Tsompanakis, B.H.V. Topping, (Editors), "Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 85, 2015. doi:10.4203/ccp.108.85 Keywords: self-centering, post-tensioned, steel frames, dampers, collapse, nearfault, seismic hazard analysis, seismic risk. Summary This paper evaluates the seismic collapse capacity of self-centering moment-resisting frames (SC-MRFs) with viscous dampers located in near-fault regions. For this purpose, a prototype steel building was designed using different seismic-resistant frames, i.e.: conventional steel 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 cyclic strength and stiffness degradation. A database of 91 near-fault, pulse-like ground motions with varying pulse periods is employed for the nonlinear dynamic analyses. Collapse capacity of the frames is evaluated through incremental dynamic analysis (IDA). The results of the IDA are combined with probabilistic seismic hazard analysis models that account for near-fault directivity to assess collapse risk of the structures. Results show that the predicted collapse capacity is affected by the pulse period of the near-fault ground motions and highlight that SC-MRFs have superior collapse resistance. Finally, it is shown that the use of viscous dampers significantly improves collapse resistance of all types of frames examined herein. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £75 +P&P)
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