A new endurance time analysis method for damage evaluation of high arch dams under the oblique incidence of mainshock-aftershock seismic sequences by wavelet decomposition

Xu, Qiang; Zhang, Tianran; Chen, Jianyun; Li, Jing; Xu, Shutong

doi:10.1016/j.soildyn.2022.107406

Cited by 16 publications

(1 citation statement)

References 82 publications

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“…Furthermore, acceleration response spectra are depicted at three distinct time points (5, 10, and 15 s). For further insights into the concept and application of IAA in dam engineering, refer to [79][80][81][82][83]. Validation of IAA with respect to classical IDA has been discussed in [84,85].…”

Section: Problem Statement and Benchmark Descriptionmentioning

confidence: 99%

Quantifying modeling uncertainties in seismic analysis of dams: Insights from an international benchmark study

Hariri‐Ardebili

2023

Earthq Engng Struct Dyn

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Advances in nonlinear dynamic analysis of dams have not completely resolved concerns over modeling confidence and analysis accuracy. Verification and validation offer accuracy assessment, but uncertainties persist during performance evaluation due to both epistemic (modeling) and aleatory (parametric) sources. Epistemic uncertainties arise from simplifications and modeling techniques. This paper addresses epistemic uncertainties in a gravity dam seismic analysis using data from the International Comnission on Large Dams (ICOLD) benchmark study. While the benchmark formulation included the finite element model of the dam, mechanical material properties, and dynamic loads, participants retained the flexibility to opt for best‐practice modeling assumptions, simplifications, and other specifics. Notable response variability emerged, particularly in crack profiles and damage predictions. This study examines sources of variability, quantifying modeling uncertainty for the benchmark problem. More specifically, the modeling variability is quantified using the logarithmic standard deviation, also known as dispersion. This metric enables its incorporation into other seismic risk assessment and fragility studies. Under relatively low‐intensity motion (peak ground acceleration [PGA] of 0.18 g in this case), modeling dispersion of 0.45, 0.30, 0.32, and 0.30 were calculated for the maximum dynamic crest displacement, maximum hydrodynamic pressure at the heel, heel and crest maximum acceleration, respectively. Additionally, the dispersion of the failure PGA was determined to be 0.7. Findings underscore the need for systematic seismic response modeling in dam engineering to enhance prediction accuracy. A better understanding of the sources and magnitudes of modeling uncertainties can help improve the reliability of dam seismic analysis and contribute to the development of more effective risk assessment and mitigation strategies.

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Section: Problem Statement and Benchmark Descriptionmentioning

confidence: 99%

Quantifying modeling uncertainties in seismic analysis of dams: Insights from an international benchmark study

Hariri‐Ardebili

2023

Earthq Engng Struct Dyn

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Analysis of Dynamic Response Characteristics of Towering Intake Towers Under the Action of Main-Aftershock Sequences

Song,

Zhai,

Liu

2024

Lecture Notes in Civil Engineering

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After a strong earthquake occurs, it can cause a certain degree of damage to the structure, and the strong aftershock effect can cause secondary damage to the already damaged structure. In this study, taking a actual project of intake tower in the district of western strong earthquake as an example, the acoustic unit is used to simulate the dynamic effect of reservoir water on the tower body, and the overall nonlinear model of the water-intake tower-foundation is established. Combined with the site and seismic motion characteristics of the engineering area, the seismic motion sequence of the main-aftershocks was constructed based on the statistical relationship between the main shocks and strong aftershocks, as well as the NGA seismic motion attenuation model. The effects of main shock, aftershock, and main-aftershock on the structural damage evolution of intake towers in strong earthquake zones were investigated separately. The results show that after considering the aftershock effect, the damage and failure of the intake tower structure intensify, and its dissipation energy and residual displacement increase by about 20%~25%. Compared with the main shock, the aftershock alone causes less damage to the tower structure. However, for the intake tower structure that is damaged after the main shock, the aftershock can cause larger secondary residual deformation of the tower.

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Seismic damage characteristics of high arch dams under oblique incidence of SV waves

Chen

Pan

Zhao

2023

Engineering Failure Analysis

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A new endurance time analysis method for damage evaluation of high arch dams under the oblique incidence of mainshock-aftershock seismic sequences by wavelet decomposition

Cited by 16 publications

References 82 publications

Quantifying modeling uncertainties in seismic analysis of dams: Insights from an international benchmark study

Quantifying modeling uncertainties in seismic analysis of dams: Insights from an international benchmark study

Analysis of Dynamic Response Characteristics of Towering Intake Towers Under the Action of Main-Aftershock Sequences

Seismic damage characteristics of high arch dams under oblique incidence of SV waves

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