Multi-Objective Evolutionary Seismic Design with Passive Energy Dissipation Systems

Lavan, Oren; Dargush, Gary F.

doi:10.1080/13632460802598545

Cited by 127 publications

(72 citation statements)

References 29 publications

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“…A wide variety of methods have been suggested to identify optimal damper placement (e.g. Apostolakis and Dargush 2010;Balling and Pister 1983;Garcia and Soong 2002;Gluck et al 1996;Lavan and Dargush 2009;Lee et al 2004;Levy and Lavan 2006;Moreschi 2001, 2002;Takewaki 2000;Yang et al 2002;Zhang and Soong 1992).…”

Section: Retrofit Feasibility Assessmentmentioning

confidence: 99%

Evaluating and improving the seismic performance of older tall buildings

Mahin¹,

Lai²,

Wang³

et al. 2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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The seismic performance of new tall buildings located in regions of high seismic hazard has been recently investigated by Pacific Earthquake Engineering Research (PEER) Center under its Tall Buildings Initiative (TBI) program. The Tall Building Initiative has now expanded to assess the seismic performance of existing tall buildings. Buildings being considered are 20 stories or more in height, and constructed on the West Coast of the U.S. between about 1960 and 1990. During this period, several hundred tall buildings were constructed in California, but earthquake-resistant design procedures had not yet been fully developed. From these structures, a 35-story steel building, designed in 1968, and having representative details from that period, was selected for evaluation. In this paper, results of three-dimensional nonlinear analysis models developed to assess the seismic performance of this structure are presented. Two earthquake hazard levels are used for the evaluation. Structural analysis results are interpreted to assess the impact of suspected deficiencies on seismic response, and the ability of different evaluation guidelines, numerical models and analysis methods to identify seismic vulnerabilities. A feasible retrofit strategy was identified. Recommendations are offered for further research and guideline evaluation.

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Section: Retrofit Feasibility Assessmentmentioning

confidence: 99%

Evaluating and improving the seismic performance of older tall buildings

Mahin¹,

Lai²,

Wang³

et al. 2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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“…Out of those, fluid viscous dampers (FVDs) have been shown to effectively reduce both displacement and force related seismic responses of structures (Constantinou and Symans, 1992;Lavan and Dargush, 2009;Lavan, 2012). Hence, the use of FVDs seems natural for seismic retrofitting where both displacements and forces due to earthquakes are to be decreased.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, the use of FVDs seems natural for seismic retrofitting where both displacements and forces due to earthquakes are to be decreased. Indeed, optimal design of such dampers for the purpose of seismic retrofitting of frame structures received much attention (Zhang and Soong, 1992;Gluck et al, 1996;Takewaki, 1997;Singh and Moreschi, 2001;Lopez-Garcia and Soong, 2002;Dargush and Sant, 2005;Lavan and Levy, 2005, 2009Aydin et al, 2007;Lavan et al, 2008;Lavan and Dargush, 2009;Adachi et al, 2013;Aguirre et al, 2013;Kanno, 2013;Martínez et al, 2013;Sonmez et al, 2013;Gidaris and Taflanidis, 2014;Hatzigeorgiou and Pnevmatikos, 2014;Lavan and Amir, 2014;Lin et al, 2014;Lavan, 2015). To allow a quick examination of whether such devices are a good alternative, simple methodologies for initial design were proposed as well (FEMA 356, 2000;Palermo et al, 2013;Landi et al, 2014;Rama Raju et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Seismic Behavior and Design of Wall–EDD–Frame Systems

Lavan

Abecassis

2015

Front. Built Environ.

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Walls and frames have different deflection lines and, depending on the seismic mass they support, may often possess different natural periods. In many cases, wall-frame structures present an advantageous behavior. In these structures, the walls and the frames are rigidly connected. Nevertheless, if the walls and the frames were not rigidly connected, an opportunity for an efficient passive control strategy would arise: connecting the two systems by energy dissipation devices (EDDs) to result in wall-EDD-frame systems. This, depending on the parameters of the system, is expected to lead to an efficient energy dissipation mechanism. This paper studies the seismic behavior of wall-EDD-frame systems in the context of retrofitting existing frame structures. The controlling non-dimensional parameters of such systems are first identified. This is followed by a rigorous and extensive parametric study that reveals the pros and cons of the new system versus wall-frame systems. The effects of the controlling parameters on the behavior of the new system are analyzed and discussed. Finally, tools are given for initial design of such retrofitting schemes. These enable both choosing the most appropriate retrofitting alternative and selecting initial values for its parameters.

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“…In particular, viscous dampers provide an efficient tool to dissipate the seismic input energy into heat, by reducing both the displacement and force demand in the structures [1,2]. To date, the performance of systems equipped with viscous dampers has been extensively analyzed by employing deterministic approaches neglecting the response dispersion due to the uncertainties in the input as well as in the structural system properties.…”

Section: Introductionmentioning

confidence: 99%