Optimal Design of Base-Isolated Systems Under Stochastic Earthquake Excitation

Jensen, Héctor A.; Valdebenito, Marcos A.; Sepulveda, Juan G.

doi:10.1007/978-94-007-5134-7_10

Cited by 7 publications

(3 citation statements)

References 27 publications

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“…The effect of different isolator models on the seismic response of base-isolated liquid storage tanks using recorded earthquake ground accelerations is investigated in [16]. In [17], only the properties of the superstructure are treated as random variables in an optimization procedure. The effect of stochastic ground motion excitation and/or stochastic system parameters on the reliability-based design and control of base-isolated systems is explored in [18,19,20,21].…”

Section: Introductionmentioning

confidence: 99%

Response Variability of Structures With Hybrid Base Isolation Systems

Μάρκου¹,

Stefanou²,

Manolis³

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Section: Introductionmentioning

confidence: 99%

Response Variability of Structures With Hybrid Base Isolation Systems

Μάρκου¹,

Stefanou²,

Manolis³

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…This work was extended to a water tower and an antenna structure (Jensen, ), as well as nonlinear structures (Jensen, ) in the optimization. The approach was then applied to optimize discrete design variables (Jensen and Beer, ) and base isolated structures (Jensen et al., ). Bhattacharjya and Chakraborty (, ) optimized element dimensions of a shear building under seismic excitation.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Structures Subject to Stochastic Dynamic Loading

Spencer

Lü

et al. 2017

Computer aided Civil Eng

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Structural optimization has progressed substantially over the last half century. However, the literature on optimization of structures under random excitation is limited. This study provides a framework for structural optimization subject to stochastic dynamic loading. Illustrative examples of structures under nonstationary seismic and stationary wind loads are presented to demonstrate the procedure. Both safety and serviceability are considered concurrently. The objective function for safety is given in terms of both harmful interstory drift and harmful interstory drift angle; whereas for serviceability, the objective function is defined in terms of floor acceleration. Safety and serviceability are shown to be competing objectives under both seismic and wind excitation; however, the contrast is less under wind excitation. The proposed optimization framework provides a rational manner in which engineering design tradeoffs can be made between the two competing objectives.

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“…[14], the randomness of earthquake loads is considered, but a parametric investigation with regard to deterministic structural -isolator parameters is also conducted. In [15], only the properties of the superstructure are treated as random variables in an optimization procedure. The effect of uncertain near-field excitations on the reliability-based performance and design of [16].…”

Section: Introductionmentioning

confidence: 99%

Stochastic Response of Nonlinear Base Isolation Systems

Μάρκου¹,

Manolis²,

Stefanou³

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Abstract. A hybrid base isolation system was used to retrofit two residential buildings in Solarino, Sicily. Subsequently, five free vibration tests were carried out in one of these buildings to assess its functionality. The hybrid base isolation system combined high damping rubber bearings with low friction sliders. In terms of numerical modeling, a single-degree-of-freedom system is used here with a new five-parameter trilinear hysteretic model for the simulation of the high damping rubber bearing, coupled with a Coulomb friction model for the simulation of the low friction sliders. Next, experimentally obtained data from the five free vibration tests were used for the calibration of this six parameter model. Following up on the model development, the present study employs Monte-Carlo simulations in order to investigate the effect of the unavoidable variation in the values of the six-parameter model on the response of the base isolation system. The calibrated parameters values from all the experiments are used as mean values, while the standard deviation for each parameter is deduced from the identification tests employing best-fit optimization for each experiment separately. The results show that variation in the material parameters of the base isolation system produce a nonstationary effect in the response. In addition, there is a magnification effect, since the coefficient of variation of the response, for most of the parameters, is larger than the coefficient of variation in the parameter values.

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Optimal Design of Base-Isolated Systems Under Stochastic Earthquake Excitation

Cited by 7 publications

References 27 publications

Response Variability of Structures With Hybrid Base Isolation Systems

Response Variability of Structures With Hybrid Base Isolation Systems

Optimization of Structures Subject to Stochastic Dynamic Loading

Stochastic Response of Nonlinear Base Isolation Systems

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