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Keywords: performance-based seismic design, probabilistic assessment, steel building, seismic protection.

Summary

The use of the base-isolation and energy dissipation has been broadly developed all over the world for the protection of buildings from earthquakes, but the number of applications is limited, indeed the "cost" is generally considered independently from the performance, ensures strong resistance to the application of the new technologies.

The paper deals with comparative analyses of the seismic response, in terms of storey drifts, plastic hinges rotations and floor acceleration, of conventionally and innovatively protected steel buildings. A probabilistic characterization in terms of fragility curves of the relevant engineered demand parameters (EDPs) to be used within a general probabilistic assessment of the performances of framed steel structures having different earthquake-resistant systems is presented. Both conventional, moment resisting frames and concentrically braced frames, and innovative, base-isolated frames and dissipating braced frames, schemes are considered.

The fragility curves represent a step of the knowledge data-base required for carrying out a full probabilistic methodology leading to an effective comparison of the performances of conventional and innovative protection systems accounting for the total costs of all the consequences to the expected seismic attacks. The following steps of the procedure should be correlated to the damage entity, the consequences of damage on the occupants, downtime and repairing costs.

Taking into account that the EDP's uncertainness is generally the most relevant source of uncertainness within a probabilistic assessment, with respect to the successive damage and losses evaluations, the direct examination of the fragility curves enables a rapid assessment of the performance of the different protection systems.

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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: 96 PROCEEDINGS OF THE THIRTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: B.H.V. Topping and Y. Tsompanakis Paper 71 A Performance Comparison of Isolated, Dissipated and Fixed-Based Steel Buildings F. Comodini¹ and M. Mezzi² ¹University eCampus, Novedrate, Como, Italy ²Department of Civil and Environmental Engineering, University of Perugia, Italy doi:10.4203/ccp.96.71 purchase the full-text of this paper Full Bibliographic Reference for this paper F. Comodini, M. Mezzi, "A Performance Comparison of Isolated, Dissipated and Fixed-Based Steel Buildings", in B.H.V. Topping, Y. Tsompanakis, (Editors), "Proceedings of the Thirteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 71, 2011. doi:10.4203/ccp.96.71 Keywords: performance-based seismic design, probabilistic assessment, steel building, seismic protection. Summary The use of the base-isolation and energy dissipation has been broadly developed all over the world for the protection of buildings from earthquakes, but the number of applications is limited, indeed the "cost" is generally considered independently from the performance, ensures strong resistance to the application of the new technologies. The paper deals with comparative analyses of the seismic response, in terms of storey drifts, plastic hinges rotations and floor acceleration, of conventionally and innovatively protected steel buildings. A probabilistic characterization in terms of fragility curves of the relevant engineered demand parameters (EDPs) to be used within a general probabilistic assessment of the performances of framed steel structures having different earthquake-resistant systems is presented. Both conventional, moment resisting frames and concentrically braced frames, and innovative, base-isolated frames and dissipating braced frames, schemes are considered. The fragility curves represent a step of the knowledge data-base required for carrying out a full probabilistic methodology leading to an effective comparison of the performances of conventional and innovative protection systems accounting for the total costs of all the consequences to the expected seismic attacks. The following steps of the procedure should be correlated to the damage entity, the consequences of damage on the occupants, downtime and repairing costs. Taking into account that the EDP's uncertainness is generally the most relevant source of uncertainness within a probabilistic assessment, with respect to the successive damage and losses evaluations, the direct examination of the fragility curves enables a rapid assessment of the performance of the different protection systems. 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 £130 +P&P)
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