Multi-objective optimization of seismically isolated high-rise building structures using genetic algorithms

Pourzeynali, Saeid; Zarif, Mohammad Haddad

doi:10.1016/j.jsv.2007.10.008

Cited by 52 publications

(24 citation statements)

References 13 publications

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“…It is well established that performance of BI system largely depends on the characteristics of isolator parameters, such as yield strength for the LRBs, optimal damping for Resilient Friction Bearing and optimal friction for friction pendulum isolator. Ranges of optimal parameters have been suggested by investigators (Baratta & Corbi, 2004;Jangid, 2007Jangid, , 2010Li & Ni, 2007;Pourzeynali & Zarif, 2008;Zhou, Wen, & Cai, 2006) for these systems to ensure best performance.…”

Section: Introductionmentioning

confidence: 99%

Optimal performance of base isolated building considering limitation on excessive isolator displacement

Das

Gur

Mishra

et al. 2014

Structure and Infrastructure Engineering

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The past studies on optimisation of isolation bearings emphasise on the allowable limit on the isolator displacement without incorporating it in the optimisation process. Large bearing displacement of the isolator during strong motion is often linked to isolator damage and pounding to adjacent units. The present study addresses the limitation on the excessive isolator displacement in the optimisation process of the isolator. It is intended not only to assure optimal performance in terms of vibration mitigation, but also to reveal the importance of constraining excessive isolator displacements. The stochastic response required for the optimisation study is evaluated through nonlinear random vibration analysis. The consistency of the optimal response behaviour obtained through stochastic optimisation is validated for recorded earthquake ground motions. A Lead Rubber Bearing (LRB), isolating a multi-story shear building is used to elucidate the effect of this constraint on the optimum parameters and system performance. The results clearly indicate the existence of significant disparities among the conventional unconstrained and the proposed constrained optimisation approach.

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Section: Introductionmentioning

confidence: 99%

Optimal performance of base isolated building considering limitation on excessive isolator displacement

Das

Gur

Mishra

et al. 2014

Structure and Infrastructure Engineering

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“…More specifically, a number of papers have appeared, in which the detection of optimum properties for base isolation systems is addressed [10][11][12][13][14]. Previous research efforts on formulating design optimization problems for seismically isolated buildings have been typically concerned with base isolation only.…”

Section: Introductionmentioning

confidence: 99%

Optimized earthquake response of multi‐storey buildings with seismic isolation at various elevations

Charmpis

Komodromos

Phocas

2012

Earthq Engng Struct Dyn

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SUMMARY The response of multi‐storey structures can be controlled under earthquake actions by installing seismic isolators at various storey levels. By vertically distributing isolation devices at various elevations, the designer is provided with numerous options to appropriately adjust the seismic performance of a building. However, introducing seismic isolators at various storey levels is not a straightforward task, as it may lead to favourable or unfavourable structural behaviour depending on a large number of factors. As a consequence, a rather chaotic decision space of seismic isolation configurations arises, within which a favourable solution needs to be located. The search for favourable isolators' configurations is formulated in this work as a single‐objective optimization task. The aim of the optimization process is to minimize the maximum floor acceleration of the building under consideration, while constraints are specified to control the maximum interstorey drift, the maximum base displacement and the total seismic isolation cost. A genetic algorithm is implemented to perform this optimization task, which selectively introduces seismic isolators at various elevations, in order to identify the optimal configuration for the isolators satisfying the pre‐specified constraints. This way, optimized earthquake response of multi‐storey buildings can be obtained. The effectiveness of the proposed optimization procedure in the design of a seismically isolated structure is demonstrated in a numerical study using time‐history analyses of a typical six‐storey building. Copyright © 2012 John Wiley & Sons, Ltd.

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“…Building A is a sixstorey shear building as discussed in Arfiadi andHadi (2001, 2011), and Building B is a six-storey building as discussed in Sadek et al (1997). The structures are considered as linear systems, similar to Pourzeynali, Lavasani, and Modarayi (2007), Pourzeynali and Zarif (2008), Shayeghi, Eimani Kalasar, and Shayeghi (2009) and Arfiadi and Hadi (2011). The adjacent buildings are Q1 subjected to the 1940 El Centro (117 El Centro Array-9 station) and the 1995 Kobe (KJMA station) excitations, where the maximum ground acceleration scaled to 0.3 g for 1940 El Centro NS and 0.8 g for 1995 Kobe NS.…”

Section: Numerical Examplementioning

confidence: 99%

Investigating the optimal passive and active vibration controls of adjacent buildings based on performance indices using genetic algorithms

Hadi

2014

Engineering Optimization

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This study proposes the optimal passive and active damper parameters for achieving the best results in seismic response mitigation of coupled buildings connected to each other by dampers. The optimisation to minimise the H2 and H-norms in the performance indices is carried out by genetic algorithms (GAs). The final passive and active damper parameters are checked for adjacent buildings connected to each other under El Centro NS 1940 and Kobe NS 1995 excitations. Using real coded GA in H-norm, the optimal controller gain is obtained by different combinations of the measurement as the feedback for designing the control force between buildings. The propsed method is more effective than other metaheuristic methods and more feasible, although the contol force increased. The results ifn the active control system show that the response of adjacent buildings is reduced in an efficient manner. 1. Please check these proofs carefully. It is the responsibility of the corresponding author to check these and approve or amend them. A second proof is not normally provided. Taylor & Francis cannot be held responsible for uncorrected errors, even if introduced during the production process. Once your corrections have been added to the article, it will be considered ready for publication.Please limit changes at this stage to the correction of errors. You should not make insignificant changes, improve prose style, add new material, or delete existing material at this stage. Making a large number of small, non-essential corrections can lead to errors being introduced. We therefore reserve the right not to make such corrections.For detailed guidance on how to check your proofs, please see http://journalauthors.tandf.co.uk/production/checkingproofs.asp. The reference "Hadi and Arfiadi (2011)" is cited in the text but is not listed in the reference list. Please either delete in-text citation or provide full reference details following journal style. Please review the AQ3The spelling of Name for "Bektas and Nigdeli (2011)" has been changed to Bekdas and Nigdeli (2011) to match the entry in the reference list. Please confirm that this is correct and provide revisions if needed. AQ4The reference "Pourzeynali et al. (2006)" is cited in Tables 8 and 9 but is not listed in the reference list. Please either delete in-text citation or provide full reference details following journal style. How to make corrections to your proofs using Adobe AcrobatTaylor & Francis now offer you a choice of options to help you make corrections to your proofs. Your PDF proof file has been enabled so that you can edit the proof directly using Adobe Acrobat. This is the simplest and best way for you to ensure that your corrections will be incorporated. If you wish to do this, please follow these instructions:1. Save the file to your hard disk.2. Check which version of Adobe Acrobat you have on your computer. You can do this by clicking on the "Help" tab, and then "About."If Adobe Reader is not installed, you can get the latest version free from http://get.a...

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Multi-objective optimization of seismically isolated high-rise building structures using genetic algorithms

Cited by 52 publications

References 13 publications

Optimal performance of base isolated building considering limitation on excessive isolator displacement

Optimal performance of base isolated building considering limitation on excessive isolator displacement

Optimized earthquake response of multi‐storey buildings with seismic isolation at various elevations

Investigating the optimal passive and active vibration controls of adjacent buildings based on performance indices using genetic algorithms

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