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http://hdl.handle.net/10773/8280
Title: | Structural optimisation problem in support to building retrofitting decision |
Author: | 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. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/8280 |
Appears in Collections: | DECivil - Comunicações |
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