scholarly journals A Contribution to a UHS-Based Seismic Risk Assessment in Croatia—A Case Study for the City of Osijek

2020 ◽  
Vol 12 (5) ◽  
pp. 1796 ◽  
Author(s):  
Gordana Pavić ◽  
Marijana Hadzima-Nyarko ◽  
Borko Bulajić
Keyword(s):  
Risk Assessment ◽  
Seismic Risk ◽  
Seismic Vulnerability ◽  
Modern Society ◽  
Seismic Risk Assessment ◽  
Hazard Exposure ◽  
Initial Stage ◽  
Vulnerability Of Buildings ◽  
The Many ◽  
The Impact

Due to increases in the number of inhabitants and their concentrations in densely populated areas, there is a growing need in modern society to be cautious towards the impact of catastrophic natural events. An earthquake is a particularly major example of this. Knowledge of the seismic vulnerability of buildings in Europe and around the world has deepened and expanded over the last 20 years, as a result of the many devastating earthquakes. In this study, a review of seismic risk assessment methods in Croatia was presented with respect to the hazard, exposure, and vulnerability of buildings in the fourth largest city (Osijek) in Croatia. The proposed algorithm for a detailed risk assessment was applied to a database and is currently in its initial stage.

Study Concerning the Level of Seismic Risk in Iasi Municipality

2017 ◽  
Vol 21 ◽  
pp. 86-93
Author(s):  
Georgiana Bunea ◽  
Cornel Doniga ◽  
Gabriela Maria Atanasiu
Keyword(s):  
Risk Assessment ◽  
Population Density ◽  
Extreme Events ◽  
Seismic Risk ◽  
Seismic Vulnerability ◽  
Seismic Risk Assessment ◽  
The Impact ◽  
The Town ◽  
General Perspective

Throughout its history, Iasi municipality has been subjected to many important seismic actions caused by earthquakes produced in Vrancea area, Romania. The impact of these extreme events upon the town increased in time as it developed, more buildings were constructed and the population density rose. The classes of buildings identified in Iasi municipality have been designed on different seismic standards, some of them being erected without taking into account the effect of seismic actions. The differences between the seismic norms’ regulations and the important earthquake’s history some of the buildings have, are outlining the need of seismic risk assessment in Iasi municipality. This paper aims to present some of the results of the seismic risk study in Iasi municipality, which was based on the completed seismic risk surveys and on the regulations of seismic standards. In this study, only the dwelling structures built before 1990 were considered, and the results were distributed on neighborhoods, for obtaining a general perspective on the seismic risk state of each area, by considering the buildings’ seismic vulnerability.

Seismic risk assessment of RC curved bridges through fragility curves

2019 ◽  
Author(s):  
Nina N. Serdar ◽  
Jelena R. Pejovic ◽  
Radenko Pejovic ◽  
Miloš Knežević
Keyword(s):  
Risk Assessment ◽  
Urban Areas ◽  
Seismic Risk ◽  
Seismic Vulnerability ◽  
Fragility Curves ◽  
Curved Bridges ◽  
Damage State ◽  
Seismic Risk Assessment ◽  
Probability Of Exceedance ◽  
Damage States

<p>It is of great importance that traffic network is still functioning in post- earthquake period, so that interventions in emergency situations are not delayed. Bridges are part of the traffic system that can be considered as critical for adequate post-earthquake response. Their seismic response often dominate the response and reliability of overall transportation system, so special attention should be given to risk assessment for these structures. In seismic vulnerability and risk assessment bridges are often classified as regular or irregular structures, dependant on their configuration. Curved bridges are considered as irregular and unexpected behaviour during seismic excitation is noticed in past earthquake events. Still there are an increasing number of these structures especially in densely populated urban areas since curved configuration is often suitable to accommodate complicated location conditions. In this paper special attention is given to seismic risk assessment of curved reinforce concrete bridges through fragility curves. Procedure for developing fragility curves is described as well as influence of radius curvature on their seismic vulnerability is investigated. Since vulnerability curves provide probability of exceedance of certain damage state, four damage states are considered: near collapse, significant damage, intermediate damage state, onset of damage and damage limitation. As much as possible these damage states are related to current European provisions. Radius of horizontal curvature is varied by changing subtended angle: 25 °, 45 ° and 90 °. Also one corresponding straight bridge is analysed. Nonlinear static procedure is used for developing of fragility curves. It was shown that probability of exceedance of certain damage states is increased as subtended angle is increased. Also it is determined that fragility of curved bridges can be related to fragility of straight counterparts what facilitates seismic evaluation of seismic vulnerability of curved bridges structures.</p>

Comparative seismic RISK assessment of existing RC buildings using seismic vulnerability index approach

Structures ◽  
2021 ◽  
Vol 32 ◽  
pp. 889-913
Author(s):  
Moustafa Moufid Kassem ◽  
Fadzli Mohamed Nazri ◽  
Ehsan Noroozinejad Farsangi ◽  
Chee Ghuan Tan
Keyword(s):  
Risk Assessment ◽  
Seismic Risk ◽  
Seismic Vulnerability ◽  
Vulnerability Index ◽  
Rc Buildings ◽  
Seismic Risk Assessment ◽  
Index Approach

Uncertainty and Correlation in Seismic Vulnerability Functions of Building Classes

2019 ◽  
Vol 35 (4) ◽  
pp. 1515-1539 ◽  
Author(s):  
Vitor Silva
Keyword(s):  
Risk Assessment ◽  
Seismic Risk ◽  
Seismic Vulnerability ◽  
Loss Ratio ◽  
Deterministic Approach ◽  
Large Variability ◽  
Ground Shaking ◽  
Statistical Framework ◽  
The Impact ◽  
Vulnerability Functions

The majority of the existing seismic risk studies use a deterministic approach to define vulnerability functions, despite the well-recognized large variability in the probability of loss ratio conditional on ground-shaking intensities. This study explored a statistical framework to simulate this variability, considering the existing correlation between assets separated by a given distance. The impact that these vulnerability modeling approaches may have in probabilistic seismic risk assessment is evaluated considering three fictitious building portfolios with distinct characteristics. To this end, loss exceedance curves and average annualized losses are compared, and recommendations are drawn regarding the optimal vulnerability modeling approach.

scholarly journals Towards the updated Italian seismic risk assessment: exposure and vulnerability modelling

2021 ◽  
Author(s):  
Angelo Masi ◽  
Sergio Lagomarsino ◽  
Mauro Dolce ◽  
Vincenzo Manfredi ◽  
Daria Ottonelli
Keyword(s):  
Risk Assessment ◽  
Earthquake Engineering ◽  
Seismic Risk ◽  
Work Package ◽  
Seismic Risk Assessment ◽  
Hazard Exposure ◽  
Regional Vulnerability ◽  
Vulnerability Model ◽  
Mechanical Approach ◽  
Risk Maps

AbstractWithin the 2019–2021 research agreement between the Civil Protection Department (DPC) and the Network of University Laboratories for Earthquake Engineering (ReLUIS), the work package WP4 “Seismic Risk Maps—MARS” is specifically devoted to update the 2018 release of the Italian National Seismic Risk Assessment. To this end, the previously considered models of hazard, exposure and vulnerability will be critically reviewed and updated by taking advantage also from the results deriving from other WPs of the DPC-ReLUIS research project. In the present paper some of the most relevant aspects that are being introduced in the development of the new Italian risk maps have been described and shortly analysed. First, a significant upgrade of the vulnerability model implemented in the new version of the platform used for risk calculation (IRMA) is proposed, where reference to the six EMS-98 classes is made also considering regional vulnerability features. Further, empirical data from observed real damage are integrated with results from numerical simulations (mechanical approach), in particular for reinforced concrete buildings. Finally, some special construction types such as schools, churches and bridges are included in order to provide a more comprehensive view of the national risk.

A Model for Probabilistic Seismic Risk Assessment of Process Plants

2016 ◽  
Author(s):  
Antonio C. Caputo
Keyword(s):  
Risk Assessment ◽  
Seismic Risk ◽  
Seismic Vulnerability ◽  
Industrial Process ◽  
Nuclear Industry ◽  
International Standards ◽  
Hazardous Substances ◽  
Seismic Risk Assessment ◽  
Damage Scenarios ◽  
Process Plants

Seismic vulnerability of industrial plants processing hazardous substances is widely documented, and thousands of such facilities are located in areas of medium to high seismicity near population centers. Nevertheless, with the exception of the nuclear industry, national or international standards do not establish any procedure for the overall seismic risk assessment of industrial process plants located in earthquake-prone areas. Moreover, existing Probabilistic Seismic Risk Assessment (PSRA) methods developed by the nuclear industry are not readily applicable to process plants. In order to overcome this limitation, in this paper a novel general-purpose PSRA method is presented, able to systematically generate potential starting scenarios, deriving from simultaneous interactions of the earthquake with each separate equipment, and to account for propagation of effects between distinct equipment (i.e. Domino effects) keeping track of multiple simultaneous and possibly interacting chains of accidents. This allows to dynamically generate damage scenarios, and to rank their risk levels determining the critical process units that can be involved.

scholarly journals SEISMIC RISK ASSESSMENT OF URBANIZED TERRITORY

2014 ◽  
Author(s):  
В.Б. Заалишвили ◽  
Б.В. Дзеранов ◽  
Л.Н. Невский ◽  
И.Г. Архиреева
Keyword(s):  
Risk Assessment ◽  
Seismic Hazard ◽  
Seismic Risk ◽  
Seismic Risk Assessment ◽  
Urbanized Territory ◽  
Hazard Vulnerability ◽  
Vulnerability Of Buildings

На основе учета всей совокупности факторов сейсмическая опасность, уязвимость застройки, сейсмический риск, разработана методика оценки и прогноза сейсмического риска. Используя полученные результаты, выполнена оценка сейсмического риска территории города Владикавказа, что позволило выделить наиболее сейсмически уязвимые участки Based on accounting all factors: seismic hazard, vulnerability of buildings a method of seismic risk assessment and prognosis of seismic risk is developed. Using the developed methodology the seismic risk assessment of Vladikavkaz city is performed, this allowed to identify the most seismically vulnerable areas

scholarly journals SEISMIC RISK ASSESSMENT OF ALGERIAN BUILDINGS IN URBAN AREA

2013 ◽  
Vol 19 (3) ◽  
pp. 348-363 ◽  
Author(s):  
Fatima Zohra Baba Hamed ◽  
Driss Djaouad Rahal ◽  
Farid Rahal
Keyword(s):  
Risk Assessment ◽  
Seismic Risk ◽  
Structural Information ◽  
Vulnerability Index ◽  
Economic Losses ◽  
Seismic Risk Assessment ◽  
Remedial Actions ◽  
Recent Earthquakes ◽  
The Impact

The recent earthquakes in Algeria have caused significant human and economic losses. The frequent occurrence of damaging earthquakes clearly demonstrates the urgent need of study on seismic risk assessment methods of buildings to effectively reduce the impact of earthquake in Algerian cities. This article contributes to the development and the application of a seismic risk method, appropriate to Algerian building specificities. This method considers five damage levels, defined accordingly to macroseismic intensity and the seismic quality of the building by means of a vulnerability index. The present paper summarises the development of a tool to integrate seismic hazard and structural information and support the decision making process in identification of seismic risk. This tool could be used in the inspection of buildings and the optimal prioritisation of strengthening and preventives remedial actions that are necessary prior to a major earthquake event.

Exploring the impact of epistemic uncertainty on a regional probabilistic seismic risk assessment model

2020 ◽  
Vol 104 (1) ◽  
pp. 997-1020 ◽  
Author(s):  
Petros Kalakonas ◽  
Vitor Silva ◽  
Amaryllis Mouyiannou ◽  
Anirudh Rao
Keyword(s):  
Risk Assessment ◽  
Seismic Risk ◽  
Epistemic Uncertainty ◽  
Assessment Model ◽  
Risk Assessment Model ◽  
Seismic Risk Assessment ◽  
The Impact

Bridge Functionality Relationships for Improved Seismic Risk Assessment of Transportation Networks

2007 ◽  
Vol 23 (1) ◽  
pp. 115-130 ◽  
Author(s):  
Jamie E. Padgett ◽  
Reginald DesRoches
Keyword(s):  
Risk Assessment ◽  
Seismic Risk ◽  
Network Performance ◽  
Transportation Network ◽  
Limit State ◽  
Seismic Risk Assessment ◽  
Web Based ◽  
Damage States ◽  
Bridge Damage ◽  
The Impact

Relationships between bridge damage and the resulting loss of functionality of the bridge are critical to assessing the impact of an earthquake event on the performance of the transportation network. This study addresses this data need by use of a Web-based survey of central and southeastern U.S. Department of Transportation bridge inspectors and officials. Results of the 28 responses are analyzed and offer a link between various types of bridge component damage and the expected level of allowable traffic carrying capacity due to closure decisions and repair procedures. This data is utilized to assess the probability of meeting various damage states, expressed in terms of restoration of functionality, and subsequently facilitate the refinement of component limit-state capacities for analytical fragility curve development. The bridge functionality relationships and methodology outlined serve as the basis for refinement of critical tools in the seismic risk assessment framework and improved assessment of transportation network performance.

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