Seismic optimum design of triple friction pendulum bearing subjected to near-fault pulse-like ground motions

Moeindarbari, Hesamaldin; Taghikhany, Touraj

doi:10.1007/s00158-014-1079-x

Cited by 28 publications

(20 citation statements)

References 14 publications

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“…The magnitude of μ is a function of different parameters such as the sliding velocity and the vertical pressure, as well as cycling and breakaway effects. [39] This study considers only the dependence of the friction coefficient on the velocity, as expressed by the equation: [17] μ…”

Section: Mechanical Behavior and Design Of Single Curved-surface Slmentioning

confidence: 99%

“…Following common practices, only the horizontal component of the ground motion is considered. [17,20,22,[40][41][42][43] Two approaches are available for performing time-history dynamic analysis of structures subjected to random earthquakes: (a) dynamic-response history analysis using a set of recorded ground-motion time histories and (b) stochastic dynamic analysis employing generated synthetic stochastic ground motion.…”

Section: Input Ground Motionmentioning

confidence: 99%

“…[16] Much effort has been made to optimize base-isolated systems from different perspectives. Moeindarbari and Taghikhany [17] applied a specific numerical optimization method based on genetic algorithms (GAs) to determine the optimal values of the design variables of a triple friction-pendulum bearing that minimize superstructure demands. Wang et al developed an optimal-cost base-isolation design technique for highway bridges subjected to transient earthquake loads.…”

Section: Introductionmentioning

confidence: 99%

“…We used the built-in "ode15" function in MATLAB to solve the state equations of motion. [17] 2 | SELECTED MODEL AND ASSUMPTIONS…”

Section: Introductionmentioning

confidence: 99%

“…However, we chose to solve the problem in the time domain for the case of nonstationary excitation and of nonlinearity in the isolation system brought about by friction. We used the built‐in “ode15” function in MATLAB to solve the state equations of motion …”

Section: Introductionmentioning

confidence: 99%

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Novel procedure for reliability-based cost optimization of seismically isolated structures for the protection of critical equipment: A case study using single curved surface sliders

Moeindarbari

Taghikhany

2017

Struct Control Health Monit

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SummaryThe optimized reliability-based design of seismic isolated structures requires a consideration of the failure probability of the system, in addition to the optimization objectives. The stochastic nature of a given system (e.g., the probable input ground motion) must therefore be properly included in the analysis model. To address this challenge, a novel procedure is developed and examined on a 3-story isolated concrete building model, to minimize the total construction cost of the system with regards to protecting sensitive equipment located within the structure.In this procedure, the structure performance and reliability were first evaluated using time-consuming Monte Carlo simulations. We then employed artificial neural networks as a response surface to facilitate the prediction of the failure probability for the supposed structure. To simulate seismic excitations, we generated artificial ground motion combining random high-frequency and long-period components.Also, a newly developed sensitivity analysis method was used to identify the critical uncertain parameters of the system. Finally, by using a simulated annealing algorithm, we determined the optimal design variables of the structure and isolation system for a range of desired probabilities of failure.The optimal results indicate that, for different target failure probability ranges, some design variables are more significant than others. KEYWORDS base isolation, critical equipment protection, neural network, reliability based cost optimization, sensitivity analysis, spectral non-stationarity

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Section: Mechanical Behavior and Design Of Single Curved-surface Slmentioning

confidence: 99%