Improved damping reduction factor models for different response spectra

Liu, Tao; Wang, Wenze; Wang, Huakun; Su, Binjian

doi:10.1016/j.engstruct.2021.113012

Cited by 4 publications

(10 citation statements)

References 28 publications

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Section: Effect Of the Site Conditions On The Vertical Drfssupporting

confidence: 93%

“…In general, the results indicate that the soil type has no apparent effect on the DRFd or the DRFv. This conclusion is also consistent with the results reported by various researchers in the literature [28,29,32,33,50]. A comparison of the DRF values for distinct soil classes is plotted in Figure 11 for different damping ratios.…”

Section: Effect Of the Site Conditions On The Vertical Drfssupporting

confidence: 90%

“…Based on several studies [32,33,35,36] and the observations in this study, the polynomial function of natural logarithms of the natural vibration period and damping ratio parameters can be used to describe the relations of the DRFs.…”

Section: Nonlinear Regression Of the Mean Drfs Of All The Selected Gr...mentioning

confidence: 99%

“…It is also obvious from the figures that the Hatzigeorgiou [40] model does not fulfill the theoretical boundary restriction that the DRF should approach one as the natural vibration period approaches zero or infinity, and this may cause disparity [33]. In addition, this model was improved to account for the influence of the soil conditions and ground motion type (i.e., near-or far-fault earthquakes) as well as the effect of the damping ratio.…”

Section: Drfamentioning

confidence: 99%

“…Xiang and Huang [32] considered the DRF for the absolute acceleration spectrum to be more susceptible to ground motion characteristics than the DRF for the pseudo-acceleration spectrum and presented a complex DRF model for the different acceleration spectra for different damping ratios and periods using 3198 vertical strong motion records on subduction earthquakes recorded by K-NET and KiK-net in Japan. Using 6466 vertical strong motion records on shallow crustal and upper-mantle earthquakes recorded by the Kyoshin network (K-NET) and the Kiban-Kyoshin network (KiK-net), Liu et al [33] and Zhang and Chao [34] proposed site-related DRF models for the displacement spectra and the acceleration spectra, respectively. They concluded that magnitude and distance have a significant impact on the DRF according to their residual analysis.…”

Section: Introductionmentioning

confidence: 99%

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The Derivation of Vertical Damping Reduction Factors for the Design and Analysis of Structures Using Acceleration, Velocity, and Displacement Spectra

Rouabeh,

Benahmed,

Palanci

et al. 2024

Applied Sciences

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Damping reduction factors (DRFs) play a vital role in the seismic design of structures. DRFs have been widely studied due to their primary importance to the lateral resistance of structures subjected to earthquakes. On the other hand, devastating earthquakes have occurred all over the world, and recently, the Kahramanmaraş earthquakes in Turkey revealed the import of the vertical component of earthquakes and their impact on structures and infrastructures. Considering the importance of this parameter, this paper aims to develop new damping reduction factor (DRF) equations for the acceleration (DRFa), velocity (DRFv), and displacement spectra (DRFd) of the vertical components of earthquakes. For this purpose, 775 real ground motion records were selected from the Pacific Earthquake Engineering Research (PEER) strong motion database, and the vertical elastic response spectra of selected records were computed according to linear dynamic analysis. Taking the 5%-damped vertical response spectra as the target, the vertical spectral damping reduction factors (DRFa, DRFv, and DRFd) were computed for 1%, 3%, 10%, 15%, 20%, 30%, and 40% damping ratios. The effect of the earthquake magnitude, distance, and soil types on the DRFs was investigated. The results indicated that magnitude, distance, and soil type had no particular effect on the trend in the DRFs. Based on the evaluations, extensive statistical analyses were carried out, and new prediction equations were developed according to the nonlinear regression method. The developed equations were then compared to those found in the literature and seismic design codes. The comparisons proved that the proposed DRFa, DRFd, and DRFv models are strongly compatible with real DRFs and show strong robustness compared to existing models.

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Section: Effect Of the Site Conditions On The Vertical Drfssupporting

confidence: 93%

Section: Effect Of the Site Conditions On The Vertical Drfssupporting

confidence: 90%

Section: Nonlinear Regression Of the Mean Drfs Of All The Selected Gr...mentioning

confidence: 99%

Section: Drfamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Derivation of Vertical Damping Reduction Factors for the Design and Analysis of Structures Using Acceleration, Velocity, and Displacement Spectra

Rouabeh,

Benahmed,

Palanci

et al. 2024

Applied Sciences

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The energy dissipation property of MWCNTs/cement paste composites

Jin

2022

Construction and Building Materials

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Improved Response Spectrum Method Based on Real-Complex Hybrid Modal Superposition for Base-Isolated Structures

Tan

2022

Int. J. Str. Stab. Dyn.

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A novel real-complex hybrid modal response spectrum method (RCHM-RSM) based on the modal superposition of the superstructure is proposed for base-isolated (BI) structures in this paper. In contrast to the traditional analysis method, the method can increase the accuracy of the structural response and avoid complex calculations. Additionally, the direct use of the damping matrix of superstructures for BI structures was found to cause an overestimation of the damping effect and consequently underestimate the deformation of the superstructure. Thus, a new scheme is proposed for determining the damping matrix for BI structures, and general expressions of the damping matrix of the superstructure and the damping constant of the isolation layer are presented. Using the proposed method to construct the damping matrix of BI structures, the equivalent load associated with the coupling damping between the structure and support can be determined when the displacement–velocity input model (D–VIM) is adopted. Analytical expressions of structural matrices are presented for a shear-type model of a BI structure, and a numerical investigation is conducted to demonstrate the feasibility and effectiveness of the proposed methods. The results show that the proposed method (RCHM-RSM) has the advantages of simple calculations and high accuracy. The numerical results obtained also confirm that the direct use of the damping matrix of superstructures for the BI structure will underestimate the superstructure response, while the displacement input model (DIM) overestimates the deformation of the isolation layer and underestimates superstructure responses, the analysis results by using D–VIM are consistent with the acceleration input model (AIM), so the D–VIM should be used instead of the DIM.

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Improved damping reduction factor models for different response spectra

Cited by 4 publications

References 28 publications

The Derivation of Vertical Damping Reduction Factors for the Design and Analysis of Structures Using Acceleration, Velocity, and Displacement Spectra

The Derivation of Vertical Damping Reduction Factors for the Design and Analysis of Structures Using Acceleration, Velocity, and Displacement Spectra

The energy dissipation property of MWCNTs/cement paste composites

Improved Response Spectrum Method Based on Real-Complex Hybrid Modal Superposition for Base-Isolated Structures

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