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 Structural optimisation problem in support to building retrofitting decision
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/8280

title: Structural optimisation problem in support to building retrofitting decision
authors: Varum, H.
Costa, A.
Pinto, A.
keywords: Optimum strengthening
Performance based design
Existing RC buildings
issue date: 2005
abstract: Various analysis methods, either linear elastic or non-linear, static or dynamic, are available for the performance analysis of existing buildings. Despite its advantages, it must be admitted that non-linear time history analysis can frequently become overly complex and impractical for general use as a first assessment. Simplified models, as the Capacity Spectrum Method, are frequently not able to accurately assess irregular structures. Considering these limitations, it is proposed and evaluated a simplified MDOF non-linear dynamic model, accounting for non-linear storey behaviour and storey damping. Based on the MDOF non-linear dynamic model, were developed optimization algorithms for the redesign of existing non-seismically designed structures. The optimization procedure searches for the optimum storey strengthening distribution (strength, stiffness or damping) in order to meet specific performance requirements, in terms of maximum inter-storey drift for a given seismic demand level. Numerical examples are presented in order to illustrate the capability of methodology.
URI: http://hdl.handle.net/10773/8280
source: 1st US-Portugal International Workshop "Grand challenges in earthquake engineering 250 years after the 1755 Lisbon Earthquake"
appears in collectionsCIVIL - Comunicações

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