Application of rigid-perfectly plastic spectra in improved seismic response assessment by Endurance Time method

Foyouzat, M.A.; Estekanchi, Homayoon E.

doi:10.1016/j.engstruct.2015.11.025

Cited by 23 publications

(7 citation statements)

References 18 publications

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“…In this method, only one acceleration is required theoretically to estimate structural dynamic response at different seismic levels from the linear elastic state to nonlinear and collapse states. erefore, computational efforts can be reduced dramatically during an endurance time analysis, while the accuracy is proved to be consistent with the IDA [24]. e ET method combines the advantages of both the POA method and the IDA method.…”

Section: Introductionmentioning

confidence: 89%

Assessing Seismic Performance of Gantry Crane Subjected to Near-Field Ground Motions Using Incremental Dynamic and Endurance Time Analysis Methods

Peng

Guo

et al. 2022

Shock and Vibration

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Assessing the seismic performance of the gantry crane is significant since the structure is more vulnerable to earthquakes with the increase in size and lifting weight capacity. This paper aims to investigate the seismic response of the gantry crane incorporating near-field ground motions using incremental dynamic and endurance time analysis (IDA and ETA) methods. To model the structure accurately, a nonlinear finite element model of the gantry crane considering the viscoelastic effect is developed in the OpenSees platform. Then, the IDA method is also carried out for a comparison with the ETA method. The results of the two methods are consistent with a correlation of 93.9% while the computational demand of the ETA method is much less than those of the IDA method. To study further, both the seismic incident angle and the application of viscous dampers using the Maxwell model are analyzed and discussed in detail. The results show that seismic incident angle has a distinct influence on the maximum seismic displacement and viscous dampers can significantly reduce the seismic demand of the gantry crane. These findings support the seismic design of gantry cranes and evaluate the structural seismic performance efficiently.

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Section: Introductionmentioning

confidence: 89%

Assessing Seismic Performance of Gantry Crane Subjected to Near-Field Ground Motions Using Incremental Dynamic and Endurance Time Analysis Methods

Peng

Guo

et al. 2022

Shock and Vibration

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“…Basim and Estekanchi [23] used ETA to assess the application of the method in the performance-based optimum design of steel frames. Foyouzat and Estekanchi [24] investigated the application of the ETA method to generate rigid-perfectly plastic spectra to improve seismic response assessment.…”

Section: Endurance Time Analysis (Eta) Methodsmentioning

confidence: 99%

Use of Continuous Wavelet Transform to Generate Endurance Time Excitation Functions for Nonlinear Seismic Analysis of Structures

Mamaghani

Lui

2023

CivilEng

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This paper presents the use of continuous wavelet transform (CWT) to capture the frequency contents, spectra of dominant frequencies and associated time durations of real earthquakes for generating artificial excitations to perform endurance time analysis (ETA) of structures. Applying CWT to three sets of forty earthquakes, the 90 percentile frequencies that span the ranges 0.08–18.41 Hz, 0.61–12.73 Hz, and 0.56–15.53 Hz; with associated time durations of 20, 15 and 16 s, respectively, for these earthquake sets are extracted. Artificial excitations that contain these ground motion characteristics are generated, progressively scaled up and applied to the target structure until failure. The scaling used is a block-shaped envelope that increases in size by a factor of 3/2 over time. Nonlinear seismic analyses of a steel frame and a concrete bridge bent using these artificial excitations have shown that the method not only successfully predicts the base shear–roof displacement responses of these structures, it also correctly identifies behavior such as weak story, concrete spalling, and core cracking. When compared with the increment dynamic analysis and time history analysis using multiple earthquakes, the proposed method is capable of producing comparable results with a significant reduction in computational time and a much smaller output file size.

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“…This value of material strain hardening was assumed based on typical modelling practice [22,23]. It is worth noting however that the use of values between 0 and 0.5 % are not expected to have a notable influence in the response for the range of displacement demands of interest for the present study, where collapse prediction is not the focus, as illustrated by [24,25]. The FE models employed and their fundamental modes are depicted in Figure 3.…”

Section: Framing Systemsmentioning

confidence: 99%

Vector-IM-based assessment of alternative framing systems under bi-directional ground-motion

Mariotti

Bougatsas

2017

Engineering Structures

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Application of rigid-perfectly plastic spectra in improved seismic response assessment by Endurance Time method

Cited by 23 publications

References 18 publications

Assessing Seismic Performance of Gantry Crane Subjected to Near-Field Ground Motions Using Incremental Dynamic and Endurance Time Analysis Methods

Assessing Seismic Performance of Gantry Crane Subjected to Near-Field Ground Motions Using Incremental Dynamic and Endurance Time Analysis Methods

Use of Continuous Wavelet Transform to Generate Endurance Time Excitation Functions for Nonlinear Seismic Analysis of Structures

Vector-IM-based assessment of alternative framing systems under bi-directional ground-motion

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