Spectral acceleration matching procedure with respect to normalization approach

Amirchoupani, Pouya; Abdollahzadeh, Gholamreza; Hamidi, Hamed

doi:10.1007/s10518-020-00897-x

Cited by 15 publications

(2 citation statements)

References 33 publications

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“…In the sixth step, suitable earthquake ground motions were selected based on Baker and Lee's [40] algorithm from selected ground motions in Table A2. Recently, Amirchoupani et al [35] proposed a new ground motion scaling method for better spectral matching of ground motions based on energy concepts. They showed that normalizing ground motions and scaling them regarding the fundamental period of vibration would lead to better spectral matching and lower error.…”

Section: Verification Of Proposed Methods With Designed Modelsmentioning

confidence: 99%

“…Moreover, stiffness deterioration and strength degradation in structural systems are effective on displacement demand of the system under probable future events. The different stiffness deterioration and strength degradation protocols have not been considered before on Gamma factor (γ), where many researchers have confirmed its significant effect on seismic responses, such as Amirchoupani et al [34,35], Abdollahzadeh et al [36], ASCE/SEI 41-17 [1], and FEMA series [37,38].…”

Section: Introductionmentioning

confidence: 99%

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The Modified Energy-based Method for Seismic Evaluation of Structural Systems with Different Hardening Ratios and Deterioration Hysteresis Models

Nodeh Farahani,

Abdollahzadeh,

Mirza Goltabar Roshan

2023

Period. Polytech. Civil Eng.

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Prediction of target displacement in structural systems plays a significant role in performance-based design and rehabilitation of structures. In this study, the γ factor for different hardening ratios, including 1, 2, 3, 5, 7.5, 10, and 15 percentages, stiffness-strength-deterioration models, and soil type classes is determined to modify the energy balance equation in performance-based plastic design (PBPD). Statistical results indicate that the effect of the hardening ratio, deterioration, and soil type class on the capacity curve is considerable. Therefore, a simple equation based on the period of the vibration and ductility is suggested to estimate the γ factor in different structural systems. Moreover, four 1-, 3-, 7-, and 12-story moment steel structures with various hardening ratios in the material are designed to validate the proposed method. The suggested values for the γ factor show exact results compared to collected displacements from time history analysis, while the error in the previous work was considerable. Statistical results showed that the mean error in the previous method in estimating target displacement for 1-, 3-. 7-, and 12-story structures is about 15%, 20%, 20%, and 32%, respectively. Conversely, the mean error in this study for estimating target displacement of 1-, 3-. 7-, and 12-story structures is about 10%, 7%, 6%, and 15%, respectively. Finally, the proposed method is examined on the empirical reinforced concrete (RC) bridge pier simulated numerically with fiber-based modeling. Similarly, the suggested equation estimates the target displacement appropriately for the concrete model compared to achieved displacements from nonlinear dynamic analysis.

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Section: Verification Of Proposed Methods With Designed Modelsmentioning

confidence: 99%