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Keywords: base isolation, existing buildings, masonry buildings, cost-benefit analysis.

Summary

The seismic protection of existing buildings through base isolation can be an effective solution taking into account the objectives for the conservation and re-use of the building. The seismic isolation of existing masonry buildings share with the base isolation of new buildings the principle of seismic protection as well as several practical problems, it has, however, some specific features.

In this paper the design of the base isolation solution proposed and developed for a school building located in a city of the Southern Italy is presented and discussed. Particular attention is paid to the comparison of the performance and cost with respect to a traditional seismic improvement solution.

The designed isolation system provides for the use of 114 HDRB devices and 100 sliders arranged in plan so as to maximize the torsion stiffness. The isolation solution allows for a total seismic protection of the building for the life safety limit state, while the conventional solution, based on a controlled seismic improvement, does not overcome 72% of that level.

The design of the insertion of the base isolation system has been completely developed at a constructive level, analyzing and solving all the operational problems posed by the application and giving the construction solutions compatible with the actual configuration of the building.

To assess the actual cost of the different retrofitting scenarios is not sufficient to consider only the initial cost, but it has been accounted for a cost-benefit analysis. It has been performed using a simplified application of a previously proposed evaluation methodology considering the initial cost of the applications and the expected costs related to the repair of the damage and the building downtime.

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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 72 A Base Isolation Option for the Full Seismic Protection of an Existing Masonry School Building M. Mezzi¹, F. Comodini² and L. Rossi¹ ¹Department of Civil and Environmental Engineering, University of Perugia, Italy ²University eCampus, Novedrate, Como, Italy doi:10.4203/ccp.96.72 purchase the full-text of this paper Full Bibliographic Reference for this paper M. Mezzi, F. Comodini, L. Rossi, "A Base Isolation Option for the Full Seismic Protection of an Existing Masonry School Building", 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 72, 2011. doi:10.4203/ccp.96.72 Keywords: base isolation, existing buildings, masonry buildings, cost-benefit analysis. Summary The seismic protection of existing buildings through base isolation can be an effective solution taking into account the objectives for the conservation and re-use of the building. The seismic isolation of existing masonry buildings share with the base isolation of new buildings the principle of seismic protection as well as several practical problems, it has, however, some specific features. In this paper the design of the base isolation solution proposed and developed for a school building located in a city of the Southern Italy is presented and discussed. Particular attention is paid to the comparison of the performance and cost with respect to a traditional seismic improvement solution. The designed isolation system provides for the use of 114 HDRB devices and 100 sliders arranged in plan so as to maximize the torsion stiffness. The isolation solution allows for a total seismic protection of the building for the life safety limit state, while the conventional solution, based on a controlled seismic improvement, does not overcome 72% of that level. The design of the insertion of the base isolation system has been completely developed at a constructive level, analyzing and solving all the operational problems posed by the application and giving the construction solutions compatible with the actual configuration of the building. To assess the actual cost of the different retrofitting scenarios is not sufficient to consider only the initial cost, but it has been accounted for a cost-benefit analysis. It has been performed using a simplified application of a previously proposed evaluation methodology considering the initial cost of the applications and the expected costs related to the repair of the damage and the building downtime. 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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