scholarly journals Three-dimensional physics-based earthquake ground motion simulations for seismic risk assessment in densely populated urban areas

2020 ◽  
Vol 3 (2) ◽  
pp. 1-31 ◽  
Author(s):  
Paola F. Antonietti ◽  
◽  
Ilario Mazzieri ◽  
Laura Melas ◽  
Roberto Paolucci ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Ground Motion ◽  
Urban Areas ◽  
Seismic Risk ◽  
Three Dimensional ◽  
Earthquake Ground Motion ◽  
Seismic Risk Assessment ◽  
Ground Motion Simulations

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>

Seismic risk assessment of the historical urban areas of Annaba city, Algeria

2017 ◽  
Vol 12 (1) ◽  
pp. 47-62 ◽  
Author(s):  
Allaeddine Athmani ◽  
Tiago Miguel Ferreira ◽  
Romeu Vicente
Keyword(s):  
Risk Assessment ◽  
Urban Areas ◽  
Seismic Risk ◽  
Seismic Risk Assessment

Probabilistic Seismic Hazard Analysis and Synthetic Ground Motion Generation for Seismic Risk Assessment of Structures in the Northeast India

2017 ◽  
Vol 8 (2) ◽  
pp. 39-59 ◽  
Author(s):  
Swarup Ghosh ◽  
Subrata Chakraborty
Keyword(s):  
Risk Assessment ◽  
Seismic Hazard ◽  
Ground Motion ◽  
Seismic Risk ◽  
Hazard Analysis ◽  
Probabilistic Seismic Hazard Analysis ◽  
Seismic Hazard Analysis ◽  
Probabilistic Seismic Hazard ◽  
Seismic Risk Assessment ◽  
Site Specific

This article outlines the performance-based seismic risk assessment (PBSRA) of structures requiring probabilistic seismic hazard analysis (PSHA) to obtain hazard curves and an evaluation of the demand model by a nonlinear structural response analysis under properly selected ground motion records. Unfortunately, such site-specific information is not readily available for Northeast region of India. The present study focuses on these two aspects to supplement the PBSRA. The estimations of hazard curves are demonstrated by considering the seismicity within 300 km radius around the considered locations and specified exposure period. Due to limited availability of natural records in this region, synthetic accelerograms are generated using stochastic point source models by identifying the most contributing magnitude distance combinations from disaggregation of the PSHA results. The significant variabilities observed in the estimated hazard, synthetic accelerograms and nonlinear building responses in the various locations indicate the need of explicit site-specific analysis for PBRSA of structures in the region.

Seismic risk assessment of buildings in urban areas: a case study for Denizli, Turkey

2008 ◽  
Vol 46 (3) ◽  
pp. 265-285 ◽  
Author(s):  
Mehmet Inel ◽  
Sevket Murat Senel ◽  
Selcuk Toprak ◽  
Yasemin Manav
Keyword(s):  
Risk Assessment ◽  
Urban Areas ◽  
Seismic Risk ◽  
Seismic Risk Assessment

scholarly journals Damage Scenarios Simulation for Seismic Risk Assessment in Urban Zones

1996 ◽  
Vol 12 (3) ◽  
pp. 371-394 ◽  
Author(s):  
Alex H. Barbat ◽  
Fabricio Yépez Moya ◽  
JoséA. Canas
Keyword(s):  
Risk Assessment ◽  
Urban Areas ◽  
Seismic Risk ◽  
Fragility Curves ◽  
Vulnerability Index ◽  
Survey Study ◽  
Seismic Behaviour ◽  
Seismic Risk Assessment ◽  
Damage Scenarios ◽  
Damage Probability Matrices

A methodology for simulating seismic damage of unreinforced masonry buildings for seismic risk assessment of urban areas is presented in this paper. The methodology is based on the Italian vulnerability index and on the results of a post-earthquake damage survey study whose main result was an observed vulnerability function. The Monte Carlo method was then used to simulate damage probability matrices, fragility curves and vulnerability functions, all of which are the basis of a seismic risk study. The simulation process required the generation of thousands of hypothetical buildings, the analysis of their seismic behaviour and probabilistic studies of the computed results. As an example, probable damage scenarios were developed for an urban zone of Barcelona.

Sign in / Sign up

Export Citation Format

Share Document