4.6 Article

Improved seismic risk evaluation for high-voltage switchgear equipment: A copula-based framework considering joint failure modes

Related references

Note: Only part of the references are listed.
Article Engineering, Civil

A physics-informed Bayesian framework for characterizing ground motion process in the presence of missing data

Yu Chen et al.

Summary: A Bayesian framework that combines seismological knowledge with empirical observations via Bayesian inference is developed to characterize ground motions even in the presence of missing data. The framework includes a Bayesian neural network model that probabilistically learns temporal patterns from ground motion data and accounts for uncertainties. The approach has been quantitatively demonstrated to provide a general solution for dealing with missing data in ground motion records and can be adopted for various engineering and seismological applications.

EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS (2023)

Article Engineering, Civil

Machine learning-based prediction of the seismic response of fault-crossing natural gas pipelines

Wenyang Zhang et al.

Summary: In this study, machine-learning and data-driven techniques were used to predict the seismic response of natural gas pipelines crossing earthquake faults. Various regression models and physics-constrained neural networks were adopted to accurately and rapidly predict the strains under fault-rupture displacements. Neural networks showed the best performance, achieving an R-2 > 0.95 for a wide range of fault displacement levels. The trained neural network and a new dataset improved the accuracy of failure probability prediction for pipelines under fault displacement hazards.

EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS (2023)

Article Engineering, Industrial

Hybrid Bayesian-Copula-based risk assessment for tall buildings subject to wind loads considering various uncertainties

Xiao-Wei Zheng et al.

Summary: This paper proposes a hybrid Bayesian-Copula method to assess wind-induced risk for tall buildings considering various uncertainties. The Bayes theorem is used to develop posterior probability distributions of unknown parameters in the marginal probability distribution of wind speed and direction as well as in the demand model for fragility estimates. The Copula technique is used to construct the joint probability model of wind speed and direction by linking their corresponding marginal distributions in a Bayesian-based framework. The application of this study shows that epistemic uncertainty has significant influences on total damage probability based on deformation and comfort. Compared to existing studies, the main contribution of this paper is the consideration of both epistemic uncertainty and aleatory uncertainty in the proposed Bayesian-based framework.

RELIABILITY ENGINEERING & SYSTEM SAFETY (2023)

Article Engineering, Civil

Seismic resilience assessment and improvement framework for electrical substations

Huangbin Liang et al.

Summary: Experience shows that electrical substations are highly vulnerable during earthquakes, and their resilience is crucial for ensuring electric power supply in earthquake-prone areas. This study proposes a quantitative framework to assess the seismic resilience of substations. The functionality of a substation is quantified using its maximum allowable transmission capacity, and a network model is developed to analyze the impact of component damage on functionality. Substation recovery is simulated considering repair crews, spare parts availability, and component-level vulnerability and recoverability. The study also investigates the effects of robustness, repair resource constraints, and recovery scheduling on substation resilience through parametric analysis.

EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS (2023)

Article Engineering, Civil

A continuous Bayesian network regression model for estimating seismic liquefaction-induced settlement of the free-field ground

Jilei Hu et al.

Summary: This study proposes a continuous Bayesian network regression model for predicting seismic liquefaction-induced settlement. By combining a hill-climbing algorithm and domain knowledge, the structure of the model is constructed, and the conditional linear Gaussian approach is used to learn the conditional probability distributions of parameters. Compared with other models, this model has better prediction accuracy and advantages.

EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS (2023)

Article Engineering, Civil

Cost-effectiveness of base isolation for large transformers in areas of high seismic intensity

Jiayi Wen et al.

Summary: This study validates the cost-effectiveness of base isolation for large transformers in areas of high seismic intensity. Shaking table testing and cost-effectiveness analysis demonstrate the significant economic benefits and risk reduction provided by base isolation.

STRUCTURE AND INFRASTRUCTURE ENGINEERING (2022)

Article Engineering, Civil

A comparative study of seismic analysis, design, and collapse safety margins of tall buildings in the United States and Japan, Part I: Performance-based analysis and design

Yusuke Hori et al.

Summary: Performance-based seismic analysis and design have become common practices in the US and Japan, but there are differences in seismic hazard analysis, design record selection, and acceptance criteria. Comparing the design procedures can improve the quantitative assessment of seismic performance of buildings in the US.

EARTHQUAKE SPECTRA (2022)

Article Construction & Building Technology

Seismic resilient steel substation with BI-TMDI: A theoretical model for optimal design

Jing Bian et al.

Summary: The based-isolation with tuned mass damper inerter (BI-TMDI) is used to improve the seismic response of steel High-voltage substation switches mounted on frame (SMF). An analytical model with three degree-of-freedom is explored for optimization and seismic design. The displacement variance of the SMFBI-TMDI system is obtained using statistical Cauchy's residue theorem and a comprehensive parametric analysis is performed. The proposed analytical model is validated through time history response analysis and shows improved accuracy compared to conventional models. This innovative control method and optimization analysis in BI-TMDI highlight its potential for enhanced vibration control in steel substations under earthquake motions.

JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH (2022)

Article Acoustics

A separation-based analytical framework for seismic responses of weakly-coupled electrical equipment

Jiayi Wen et al.

Summary: Weakly-coupled electrical equipment, characterized by flexible connection parts and different material damping, requires cautious consideration of global vibration modes and proportional damping. A separation-based analytical framework was developed to study the mechanism of the weakly-coupled effect, which found that dynamic transmission of the connection parts is the nature of the effect. The framework was proven to be more applicable and effective for weakly-coupled electrical equipment through shaking table testing and comparison with conventional methods.

JOURNAL OF SOUND AND VIBRATION (2021)

Article Engineering, Civil

Improvement of the polyurethane spring isolation device for HV post insulators and its evaluation by fragility curves

Tansu Gokce et al.

Summary: A novel seismic base isolation system has been developed for high-voltage porcelain post insulators. Experimental and numerical assessments of two alternative designs of the device were conducted, showing its effectiveness in diminishing the base moment of the insulator. Ensuring adequate slackness in the flexible conductors is crucial due to relatively large displacements at the top of the pole.

EARTHQUAKE SPECTRA (2021)

Article Construction & Building Technology

Relationship between Damage Rate of High-Voltage Electrical Equipment and Instrumental Seismic Intensity

Rushan Liu et al.

Summary: This paper utilized the cumulative Gaussian distribution function to describe the relationship between the damage rate of high-voltage electrical equipment and the instrumental seismic intensity in the Wenchuan earthquake. Results indicate that transformers are the most vulnerable equipment during earthquakes, followed by circuit breakers, lightning arresters, current mutual inductors, and isolating switches.

ADVANCES IN CIVIL ENGINEERING (2021)

Article Engineering, Industrial

Research on a seismic connectivity reliability model of power systems based on the quasi-Monte Carlo method

Xiaohang Liu et al.

Summary: This study applies the quasi-Monte Carlo method and the triangle algorithm to improve the efficiency and accuracy of seismic connectivity reliability assessment in power systems. By combining seismic hazard analysis and fragility analysis results, the effectiveness of this method is further validated.

RELIABILITY ENGINEERING & SYSTEM SAFETY (2021)

Article Engineering, Geological

Coupling effects of power substation equipment with multiple configurations

Qiang Xie et al.

Summary: When power substation equipment is subjected to earthquakes, closed blades can produce coupling effects between interconnected pieces, affecting their dynamic properties and seismic responses. The main blade was found to be a weak connection, leading to inconsistent resonance. Coupling effects were confirmed to be produced by a nonlinear mechanism.

SOIL DYNAMICS AND EARTHQUAKE ENGINEERING (2021)

Article Engineering, Civil

Quantifying seismic response uncertainty of electrical substation structures using endurance time method

Amir Ghahremani Baghmisheh et al.

Summary: A new procedure is proposed to quantify uncertainties involved in the seismic response of structures, using the endurance time method concept and a sampling-based approach on randomly generated structural models. This method can accurately predict response distribution with reduced computational effort, extending the application of performance-based design in structures.

STRUCTURES (2021)

Article Engineering, Geological

Seismic evaluation and analysis of 1100-kVUHV porcelain transformer bushings

Chang He et al.

SOIL DYNAMICS AND EARTHQUAKE ENGINEERING (2019)

Article Engineering, Geological

Effects of rigid bus conductors on seismic fragility of electrical substation equipment

Amir Gh Baghmisheh et al.

SOIL DYNAMICS AND EARTHQUAKE ENGINEERING (2019)

Article Engineering, Civil

Probability-based seismic reliability assessment method for substation systems

Jichao Li et al.

EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS (2019)

Article Engineering, Geological

Evaluation of power substation equipment seismic vulnerability by multivariate fragility analysis: A case study on a 420 kV circuit breaker

Seyed Alireza Zareei et al.

SOIL DYNAMICS AND EARTHQUAKE ENGINEERING (2017)

Article Engineering, Civil

Response evaluation of interconnected electrical substation equipment using real-time hybrid simulation on multiple shaking tables

Khalid M. Mosalam et al.

EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS (2016)

Article Engineering, Civil

Copula-based joint probability function for PGA and CAV: a case study from Taiwan

Yun Xu et al.

EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS (2016)

Article Engineering, Civil

Mechanical behavior of electrical hollow composite post insulators: Experimental and analytical study

Siamak Epackachi et al.

ENGINEERING STRUCTURES (2015)

Article Engineering, Civil

Seismic performance evaluation of high voltage disconnect switches using real-time hybrid simulation: I. System development and validation

Khalid M. Mosalam et al.

EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS (2014)

Article Engineering, Geological

Seismic vulnerability assessment of a high voltage disconnect switch

Fabrizio Paolacci et al.

SOIL DYNAMICS AND EARTHQUAKE ENGINEERING (2014)

Article Engineering, Civil

Seismic evaluation and analysis of high-voltage substation disconnect switches

Andrew S. Whittaker et al.

ENGINEERING STRUCTURES (2007)