scholarly journals Brief communication "Fast-track earthquake risk assessment for selected urban areas in Turkey"

2011 ◽  
Vol 11 (2) ◽  
pp. 571-585 ◽  
Author(s):  
D. Kepekci ◽  
F. Ozcep
Keyword(s):  
Risk Assessment ◽  
Relative Risk ◽  
Ground Motion ◽  
Urban Areas ◽  
Hazard Analysis ◽  
Reference Value ◽  
Earthquake Hazard ◽  
Disaster Mitigation ◽  
Risk Level ◽  
Earthquake Risk

Abstract. This study is presented as a contribution to earthquake disaster mitigation studies for selected cities in Turkey. The risk evaluations must be based on earthquake hazard analysis and city information. To estimate the ground motion level, data for earthquakes with a magnitude greater than 4.5 and an epicenter location within a 100-km radius of each city were used for the period from 1900 to 2006, as recorded at the Kandilli Observatory and Earthquake Research Institute. Probabilistic seismic hazard analysis for each city was carried out using Poisson probabilistic approaches. Ground motion level was estimated as the probability of a given degree of acceleration with a 10% exceedence rate during a 50-year time period for each city. The risk level of each city was evaluated using the number of houses, the per-capita income of city residents, population, and ground motion levels. The maximum risk level obtained for the cities was taken as a reference value for relative risk assessment, and other risk values were estimated relative to the maximum risk level. When the selected cities were classified according to their relative risk levels, the five most risky cities were found to be, in descending order of risk, Istanbul, Izmir, Ankara, Bursa, and Kocaeli.

Disaster Risk Assessment Among Iranian Exceptional Schools

2021 ◽  
pp. 1-5
Author(s):  
Seyedeh Samaneh Miresmaeeli ◽  
Nafiseh Esmaeili ◽  
Sepideh Sadeghi Ashlaghi ◽  
Zahra Abbasi Dolatabadi
Keyword(s):  
Risk Assessment ◽  
Cross Sectional Study ◽  
Disaster Risk ◽  
Disaster Mitigation ◽  
Vulnerable Groups ◽  
Risk Level ◽  
Cross Sectional ◽  
Fire Extinguishing ◽  
Disaster Risk Assessment ◽  
The Right

Abstract Background: Exceptional children, like other children, have the right to be educated in a safe environment. Disasters are considered as serious issues regarding safety and security of educational environments. Following disasters, vulnerable groups, especially children with handicaps and disabilities are more likely to be seriously injured. Thus, the present study aimed to evaluate the safety and disaster risk assessment of exceptional schools in Tehran, Iran. Method: The cross-sectional study was conducted in exceptional schools in Tehran, 2018. First, 55 exceptional schools in all grades were selected based on census sampling method and evaluated by using a checklist designed by Tehran Disaster Mitigation and Management Organization (TDMMO) and Ministry of Education in 2015. The data were analyzed using Excel software and statistical descriptive tests. Result: Based on the results, school facilities are worn and have unsafe elevators (least safety: 7.69%), yards (least safety: 9.52%), laboratories (least safety: 16.67%), libraries (least safety: 24.24%), fire extinguishing systems (least safety: 28.99%), and storage rooms and kitchens (least safety: 33.33%) which require immediate considerations. In total, the safety of exceptional schools in this study was 70.13%, which suggests medium-risk level. Conclusion: The educational settings must be reconsidered, along with identifying the risk and safety at school. In addition, a standard should be established for evaluating safety, especially in exceptional schools.

scholarly journals Geophysical and geotechnical factors in urban planing: Bursa (Nilüfer, Osmangazi, and Yildirim) cases

2020 ◽  
Author(s):  
Ferhat Özçep ◽  
Guldane Boyraz ◽  
Okan Tezel ◽  
Hakan Alp ◽  
Nuray Alpaslan ◽  
...  
Keyword(s):  
Ground Motion ◽  
Hazard Analysis ◽  
Earthquake Hazard ◽  
Cyclic Stress ◽  
Soil Liquefaction ◽  
Wave Velocities ◽  
Shear Wave Velocities ◽  
Earthquake Motion ◽  
Potential Index ◽  
Earthquake Hazard Analysis

Abstract. The study area covers the Central of Bursa, Osmangazi, Yildirim, Gürsü, Kestel and Nilüfer District boundaries in Bursa. The seismic process deals with the occurrence of an earthquake event and the process of wave propagation from the source to the site. Local amplification caused by surficial soft soils is a significant factor in destructive earthquake motion. In the first phase of this study, it is investigated the ground motion level and soil amplifications for Bursa city. For his aim, probabilistic and deterministic earthquake hazard analysis (including acceleration estimations) will be carried out for the region. Local amplification caused by surficial soft soils is a significant factor in destructive earthquake motion. In the first phase of this study, it is investigated the ground motion level and soil acharacterization for the region. For his aim, probabilistic earthquake hazard analysis (including acceleration estimations) was carried out for the region. Then, soil shear wave velocities were estimated from data obtained by MASW measurements. Soil liquefaction is a natural event in which the strength and stiffness of a soil are reduced by earthquake vibrations or other dynamic loadings. As it is known, liquefaction occurs in saturated soils, that is, soils in which the space between individual particles is completely filled with water. One of liquefaction evaluation methods is based on the cyclic stress approach. In this method, a safety factor is defined as CRR/CSR. CRR is a cyclic resistance ratio that represents soil liquefaction susceptibility, and CSR is the cyclic stress ratio that represents the earthquake effect. In the second phase of this study, possible soil potential index (PL) and ground induced settlements were estimated by using Isihara ve Yoshimine (1990) approach. All results on liquefaction potential index (Pl), liquefaction induced settlements and soil shear wave velocities in Bursa (Turkey) City were compared with each other. Finally, a seismic microzonation map was prepared by the integration of geophysical and geotechnical data for urban planning purposes.

scholarly journals Analisis Risiko Keselamatan dan Kesehatan Kerja (K3) dengan Metode Hazard Analysis (Studi Kasus pada Proyek Pembangunan Perumahan)

2020 ◽  
Vol 5 (1) ◽  
pp. 29
Author(s):  
Nidya Wisudawati ◽  
Rurry Patradhiani
Keyword(s):  
Risk Assessment ◽  
Hazard Analysis ◽  
Risk Control ◽  
Hazard Identification ◽  
Risk Level

Risiko kecelakaan kerja merupahal hal yang tak dapat dihindari dari kegiatan proyek pembangunan. PT Gran Anugerah Wijaya merupakan pengusaha pengembang perumahan yang sedang mengerjakan proyek pembangunanan 58 unit rumah tipe 36 yang berlokasi di daerah Palembang. Dari hasil pengamatan lapangan, alur proses pembangunan rumah yang dikerjakan meliputi pemasangan pondasi, pemasangan dinding, pemasangan kusen kayu, pemasangan rangka atap dan finishing. Hazard Identification, Risk Assessment dan Risk Control telah dilakukan dlaam penelitian ini. Hasil yang didapat bahwa terdapat 27 potensi risiko dengan risk level diantara rendah hinggi tinggi. Pengendalian risiko yang bisa dilakaukan untuk mengurangi bahaya kerja terhadap karyawan bangunan diantaranya substitusi, administrasi dan Alat Pelindung Diri (APD).

scholarly journals Life on the Wellington Fault: Managing Geological Collections and Earthquake Risk

2018 ◽  
Vol 2 ◽  
pp. e26230
Author(s):  
Delia Strong ◽  
Marianna Terezow
Keyword(s):  
New Zealand ◽  
Earth Science ◽  
Active Faults ◽  
Earthquake Hazard ◽  
Return Time ◽  
Disaster Mitigation ◽  
Earthquake Risk ◽  
Ground Shaking ◽  
Reference Collection

GNS Science is home to New Zealand’s national rock, mineral and fossil collections. The National Petrology Reference Collection (NPRC) is a ‘nationally significant’ collection of rocks and minerals from on- and off-shore New Zealand, Antarctica and the rest of the world. The National Paleontological Collection (NPC) is another nationally significant collection; of fossil material from New Zealand, the South West Pacific region and Antarctica, with some overseas additions. Their status as nationally significant collections mean that GNS Science is contracted by the New Zealand Government to provide long-term collection management. Collectively, the NPC and NPRC constitute more than 200,000 samples, dating from the earliest days of New Zealand geology exploration in the late 1800s. The collections continue to grow by hundreds to thousands of samples per year, and are loaned nationally and internationally for scientific research. They are by far the largest collections of fossils, rocks and minerals housed in New Zealand, and are important earth science archives for the entire Zealandian Southern Ocean region. The collections are housed on-site at GNS Science in Lower Hutt, a few hundred meters from the surface trace of the Wellington Fault and within striking distance of other active faults that could generate major earthquakes. Best estimates suggest that the Wellington Region has an average return time of about 150 years for very strong or extreme ground shaking. Such proximity to this significant, active hazard means that steps must be taken to ensure the long-term security and integrity of the collections in the event of earthquake shaking, as well as other natural and non-natural disasters. To that end, the collection managers have written and implemented disaster mitigation, preparedness and recovery plans for the National Petrology Reference Collection and National Paleontological Collection. Here we define the earthquake hazard posed by the Wellington Fault, assess the risk to the collections, and present steps taken to manage that risk.

scholarly journals Fire Risk Assessment in Dense Urban Areas Using Information Fusion Techniques

2019 ◽  
Vol 8 (12) ◽  
pp. 579 ◽  
Author(s):  
Zohreh Masoumi ◽  
John van L.Genderen ◽  
Jamshid Maleki
Keyword(s):  
Risk Assessment ◽  
Information Fusion ◽  
Urban Areas ◽  
Spatial Information ◽  
Fire Risk ◽  
Mitigation Strategies ◽  
Risk Level ◽  
High Rise ◽  
High Rise Building ◽  
Fire Risk Assessment

A comprehensive fire risk assessment is very important in dense urban areas as it provides an estimation of people at risk and property. Fire policy and mitigation strategies in developing countries are constrained by inadequate information, which is mainly due to a lack of capacity and resources for data collection, analysis, and modeling. In this research, we calculated the fire risk considering two aspects, urban infrastructure and the characteristics of a high-rise building for a dense urban area in Zanjan city. Since the resources for this purpose were rather limited, a variety of information was gathered and information fusion techniques were conducted by employing spatial analyses to produce fire risk maps. For this purpose, the spatial information produced using unmanned aerial vehicles (UAVs) and then attribute data (about 150 characteristics of each high-rise building) were gathered for each building. Finally, considering high-risk urban infrastructures, like the position of oil and gas pipes and electricity lines and the fire safety analysis of high-rise buildings, the vulnerability map for the area was prepared. The fire risk of each building was assessed and its risk level was identified. Results can help decision-makers, urban planners, emergency managers, and community organizations to plan for providing facilities and minimizing fire hazards and solve some related problems to reduce the fire risk. Moreover, the results of sensitivity analysis (SA) indicate that the social training factor is the most effective causative factor in the fire risk.

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.

ANALISIS PENERAPAN KESELAMATAN KERJA DALAM UPAYA PENGENDALIAN KECELAKAAN KERJA DI PT. BUDI DWIYASA PERKASA

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
Farah Alhamid ◽  
Keyword(s):  
Risk Assessment ◽  
Hazard Analysis ◽  
Assessment Method ◽  
Hazard Identification ◽  
Risk Level ◽  
Protective Equipment ◽  
Risk Assessment Method ◽  
Accident Data ◽  
Plantation Company ◽  
Work Done

Abstract In conducting activities, many found workers who did not use personal protective equipment, do not pay attention to safety in work and work done like without procedure. PT. Budi Dwiyasa Perkasais a plantation company palm oil. Based on accident data obtained work, there are 14 case of accident in April until June 2016 in PT. Budi Dwiyasa Perkasa. A major factor cause of the accident is unsafe actions and unsafe conditions. Hazard analysis needs to be done in order to prevent the accident of work. Hazard identification done with using the risk assessment method. This analysis of the technique used to determine the level of the risk of a job is a combination of between the possibility of the harms caused by the severity of the caused. The result of hazard identification with this method is used in a kind of work to have a high risk level and need to address special in order to prevent the accident.

Incorporating Simulated Ground Motion in Seismic Risk Assessment: Application to the Lower Indian Himalayas

2015 ◽  
Vol 31 (1) ◽  
pp. 71-95 ◽  
Author(s):  
Mathilde B. Sørensen ◽  
Dominik H. Lang
Keyword(s):  
Risk Assessment ◽  
Ground Motion ◽  
Near Field ◽  
Earthquake Hazard ◽  
Prediction Equation ◽  
Test Bed ◽  
Loss Assessment ◽  
Ground Motion Simulations ◽  
Finite Fault ◽  
Indian Himalayas

In this study, the effects of implementing stochastic finite fault ground motion simulations in earthquake hazard and risk assessment are evaluated. The investigations are conducted for the city of Dehradun (Indian Himalayas). We compare two ground motion estimation techniques: a ground motion prediction equation–based technique and a simulation-based technique. The comparison focuses on the differences the techniques imply on earthquake damage and loss estimates. Ground motion simulations are first calibrated against the instrumental recordings of the 1991 Mw 6.8 Uttarkashi earthquake. Afterward, a number of events are considered with different magnitude, distance, and azimuth to the source. Results indicate large differences between ground motion and loss estimates derived by the two methods, especially in the direction of rupture propagation, which persist to 2–2.5 fault lengths distance. It is therefore strongly recommended to consider rupture kinematics and orientation to the test bed when providing ground motion estimates for near-field earthquake loss assessment studies.

scholarly journals Analisis Bahaya dan Resiko Bencana Gunungapi Papandayan (Studi Kasus: Kecamatan Cisurupan, Kabupaten Garut)

2012 ◽  
Vol 26 (1) ◽  
pp. 1
Author(s):  
Saut Aritua Hasiholan Sagala ◽  
Hadian Idhar Yasaditama
Keyword(s):  
Risk Assessment ◽  
Social Vulnerability ◽  
Hazard Analysis ◽  
Active Volcano ◽  
Decision Makers ◽  
Disaster Mitigation ◽  
Risk Map ◽  
Economic Vulnerability ◽  
Disaster Event ◽  
Post Disaster

Risk assessment is an important step to be carried out for disaster management. It provides information for decision makers and communities in pre-disaster, during disaster and post disaster event. Nevertheless, risk assessment in Indonesia, especially on active volcanoes is still limited. This paper presents the risk assessment of Mt. Papandayan (2.665 m), the most active volcano in West Java. The unit of analysis in this study follows the administrative boundaries of village so that the identification can be applied at village level using GIS. Hazard analysis refers to the official hazard map produced by PVMBG while the vulnerability analysis is carried out in 3 sub-analysis, physical vulnerability (7 indicators), social vulnerability (7 indicators), and economic vulnerability. The hazard and vulnerability were overlayed in order to produce the risk which is subsequently made into risk map. The findings indicate that the villages located near and on the direction of the crater have relatively higher risk compared to other villages. The risk map can be incorporated as one of references for spatial planning that integrates disaster mitigation.

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