Structural upgrading strategy for electric power networks under seismic action

Vanzi, Ivo

doi:10.1002/1096-9845(200007)29:7<1053::aid-eqe954>3.0.co;2-x

Cited by 44 publications

(33 citation statements)

References 6 publications

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“…housing characteristics, population density etc.). In Vanzi (2000), for the case of Sicily, the correlation between earthquake intensity (MMI) and expected casualties at a municipality m, with pop m inhabitants, was expressed as:…”

Section: Output Treatment and Resultsmentioning

confidence: 99%

“…These analyses can be extended by considering retrofitting cost divided by the increase of safety, thus obtaining the classical format of cost-benefit analysis (e.g. Vanzi (2000)). …”

Section: Introductionmentioning

confidence: 99%

“…The reader is referred to previous studies (Vanzi 1996, Vanzi 2000, Nuti et al 2007) for a more detailed description of electric networks; for the sake of completeness, some points to remember will be made herein. Electric power networks contain two basic components: nodes (power production, distribution and distribution-transformation stations) and sides of the network (power transmission lines, high tension (HT) between 380 and 220 kV, medium tension (MT) between 150 and 60 kV and low tension (LT) below 60 kV).…”

Section: Electric Network 31 Introductionmentioning

confidence: 99%

“…All these components, referred to as microcomponents, are listed in Table 1, together with the symbols commonly used in electric engineering to indicate them. Table 1 also shows the parameters (l , z ¼ natural log of the mean and standard deviation) of their lognormal fragility curve (Vanzi 1996(Vanzi , 2000, expressed as a function of the peak ground acceleration (m/s 2 ).…”

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confidence: 99%

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Seismic safety of network structures and infrastructures

Nuti

Rasulo

Vanzi

2010

Structure and Infrastructure Engineering

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Realistic assessment of network structural safety requires modelling of a reasonably large part of the network itself. Although this statement may appear too demanding, both for modelling and computing reasons, there are clear motivations and technological possibilities to do complex network analyses. In this paper, the safety analyses of three infrastructures that have been shaken by an earthquake are described, modelled and computed: the electric power, water and road systems. For each network, results extracted from real networks, some of which have been studied in the past by the authors, are presented and discussed. No inter-network analysis is carried out, although it is recognised that this would be the most complete approach. The common parts in the procedure to model and analyse each network, via Monte Carlo simulations, are detailed at the beginning of the paper, thus showing the many common points that show up in any network analysis.

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Section: Output Treatment and Resultsmentioning

confidence: 99%

“…These analyses can be extended by considering retrofitting cost divided by the increase of safety, thus obtaining the classical format of cost-benefit analysis (e.g. Vanzi (2000)). …”

Section: Introductionmentioning

confidence: 99%

Section: Electric Network 31 Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Seismic safety of network structures and infrastructures

Nuti

Rasulo

Vanzi

2010

Structure and Infrastructure Engineering

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“…Other previous studies also used a mechanicist approach (Vanzi 2000;Nuti et al 2007) to analyse substation equipments. Vanzi evaluated the fragility curves of electric equipments as a function of the peak ground acceleration.…”

Section: Electric Power Systemmentioning

confidence: 99%

Seismic vulnerability of lifelines in the greater Lisbon area

Azevedo¹,

Guerreiro²,

Bento³

et al. 2009

Bull Earthquake Eng

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A study on the seismic vulnerability of the lifeline systems in the greater Lisbon area, in Portugal, is described. The work is part of a major program, an initiative of the Portuguese Authority for Civil Protection, intending to develop a tool for the assessment of seismic impact and emergency planning support. It had as a final goal the development of a simulator for the damage estimation of different lifeline systems, working on a GIS, including highways and railways, water supply systems, electric power supply systems, liquid and gas fuels systems. Previous publications have focused on the analysis methodologies and results regarding both the integrated lifeline system and the individual systems (Azevedo et al. in Seismic impact on lifelines in the great Lisbon area, 13th world conference on earthquake engineering, Vancouver, 2004; Guerreiro and Azevedo in Seismic vulnerability assessment of highways and railways-application to the great Lisbon area, 13th world conference on earthquake engineering, Vancouver, 2004). This paper focuses on some of the main conclusions and shows some of the interdependences between the performances of the several systems. Among some of the analyzed issues, regarding the several systems, are:• Comparison of the assumed seismic input and its format: magnitude, epicentral distance, peak ground acceleration, peak ground velocity, permanent ground displacement; • Comparison of output response characterization: malfunction probability, percentage of damaged equipment, probability of different damage states; • Construction of the fragility curves for the different systems, with the description of the general methodologies and criteria; • Comparison of the performance of the different systems and main common reasons for malfunctioning; the output of some analyzed scenarios is shown and the discussion on its reliability is analyzed.

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Seismic risk assessment of interdependent critical infrastructure systems: The case of European gas and electricity networks

Karmen

Flavio

Gutiérrez

2011

Earthq Engng Struct Dyn

160

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SUMMARYWe study the seismic vulnerability of the interdependent European gas and electricity transmission networks from a topological point of view, whereby the electricity network depends on the gas network through gas-fired power plants. First, we assessed the seismic response for each independent network; then we analyzed the increased vulnerability due to their interdependency. We implemented a probabilistic reliability model that encompasses the spatial distribution of both network structures and their seismic hazard exposure using a Geographic Information System. We characterized the network interdependency using the strength of coupling of the interconnections, together with the seismic response of the independent-gas-network. We calculated the network fragility curves of the independent and dependent networks in terms of various performance measures (connectivity loss, power loss, and impact on the population) and found that the gas network is more seismically vulnerable than the electricity network. The interdependency introduces an extra vulnerability to the electricity network response that decreases with the extensiveness of the networks' damage states. Damage was also evaluated at a local level in order to identify the most vulnerable parts of the network, where it was found that the potential for the highest power loss is located in southeast Europe.

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Structural upgrading strategy for electric power networks under seismic action

Cited by 44 publications

References 6 publications

Seismic safety of network structures and infrastructures

Seismic safety of network structures and infrastructures

Seismic vulnerability of lifelines in the greater Lisbon area

Seismic risk assessment of interdependent critical infrastructure systems: The case of European gas and electricity networks

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