Synthetic Pulse Model for Near-Fault Effects on Structures

Whitney, Reeves

doi:10.1061/(asce)sc.1943-5576.0000490

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…It is widely acknowledged that the near field of a rupturing fault can considerably influence the seismic-induced structural response of flexible buildings, such as high-rise and seismically base-isolated structures, etc. (see, for example, [33][34][35]). These pulse-like ground motions near faults differ dramatically from those seen in the far field.…”

Section: Introductionmentioning

confidence: 99%

Effects of near-fault and far-fault ground motions on seismic responses of multi-storey building structures controlled by tuned mass damper inerter

Abd-Elhamed

2022

Preprint

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The tuned mass-damper-inerter (TMDI) is a newly developed passive energy dissipation unit that combines the conventional tuned mass-damper (TMD) with an inerter mechanism to attenuate undesirable vibrations. Far- and near-fault earthquake characteristics influence optimal TMDI parameters in controlling displacement demands on building structures. This study provides a comprehensive evaluation of the impact of TMDI on the structural response of linear-behaving multi-degree-of-freedom (MDOF) structures subjected to far-and near-fault earthquake-induced ground shaking. The chosen near-fault records guarantee motions with forward directivity (FD) and motions with fling step (FS). An approach based on a genetic algorithm (GA) is used to tackle the optimization problem. The objective function that needs to be minimized is the displacement of the building's top story. On the basis of predetermined mass and inertance ratios, the single-objective minimization method is used to compute the optimal design parameters (damping and frequency ratios). TMD and TMDI's optimal control capabilities are compared, and an inerter dependence analysis is conducted to probe the effect of the improvement. It is analytically demonstrated that the TMDI performs better than the conventional TMD for relatively small mass ratios, regardless the distance from a fault rupture. However, the TMD's high-mode dampening effect can be further enhanced by increasing the inertance of the inerter. Additionally, buildings excited by near-fault records with FS have a higher seismic demand on their induced responses. Lastly, the inerter's mass-amplification effect can either enhance the performance of the conventional TMD, for a certain TMD mass, or replace a portion of the TMD's oscillating mass, to realize a substantial weight reduction at a desired level of vibration suppression.

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Section: Introductionmentioning

confidence: 99%

Effects of near-fault and far-fault ground motions on seismic responses of multi-storey building structures controlled by tuned mass damper inerter

Abd-Elhamed

2022

Preprint

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“…In particular, we propose to explore through wavelets micro‐to‐macro interactions at points where we have material or load discontinuities, such as tips (in the former case) or concentrated forces (in the latter). We follow a view introduced in Bosi 20 and Bosi et al 21 to detect mechanical discontinuities through the analysis of wavelet spikes, a view investigated further in other studies 22–24 and references therein.…”

Section: Introductionmentioning

confidence: 99%

Micro‐to‐macro interactions in complex bodies: Wavelet‐based post‐processing detection

Bosi¹,

Mariano

Salvatori

2021

Math Methods in App Sciences

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We propose to couple finite element simulations and wavelet‐based post‐processing analysis to explore deeply the interaction degree of microscopic events on the gross behavior of complex bodies (which class includes metamaterials), above all around material or load discontinuities. After summarizing the theoretical structures our procedure refers to, as a sample case we select a special class of complex materials, namely, quasicrystals, and show how the proposed scheme works. As a result, we point out the effects of atomic rearrangements characterizing the quasicrystal structure on the stress field around a crack tip in static and dynamical setting. Our procedure can be also used for the analysis of dynamic experimental data. In this case, it allows us to detect discontinuities at least along directions selected within the body. In turn, our procedure can be used for monitoring purposes.

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Optimization and performance assessment of tuned mass damper inerter systems for control of buildings subjected to pulse-like ground motions

et al. 2022

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Synthetic Pulse Model for Near-Fault Effects on Structures

Cited by 3 publications

References 14 publications

Effects of near-fault and far-fault ground motions on seismic responses of multi-storey building structures controlled by tuned mass damper inerter

Effects of near-fault and far-fault ground motions on seismic responses of multi-storey building structures controlled by tuned mass damper inerter

Micro‐to‐macro interactions in complex bodies: Wavelet‐based post‐processing detection

Optimization and performance assessment of tuned mass damper inerter systems for control of buildings subjected to pulse-like ground motions

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