Identifying key environmental and building features affecting the outcome of a seismic event: a case study of the “921” earthquake

2022 ◽  
Author(s):  
Tzu-Ling Chen ◽  
Larry Paris
Keyword(s):  
Seismic Event

scholarly journals Effectiveness of reducing seismic hazard by means of group winning blasting - case study from a copper ore mine in Poland

2018 ◽  
Vol 66 ◽  
pp. 01010
Author(s):  
Anna Barbara Gogolewska ◽  
Natalia Czajkowska
Keyword(s):  
Seismic Event ◽  
Seismic Energy ◽  
Underground Mines ◽  
Copper Ore ◽  
Ore Deposit ◽  
South West ◽  
Effective Operation ◽  
Before And After

The copper ore deposit situated in the south-west of Poland is mined by three underground mines owned by KGHM Polish Copper JSC. Exploitation has been accompanied by rock burst hazard since the beginning. Thus, numerous different preventing measures have been developed such as temporary, organizational and long-term ones. However, no one has been able to predict the time, place and energy of a seismic event. The group winning blasting, with maximum number of blasted faces, is the most effective operation to reduce seismic threat. The more faces are blasted the more seismic energy should be reduced. The study aims at assessing the blasting effectiveness in inducing rock bursts and tremors. For this purpose, the seismic activity induced by mining and blasting were investigated. The number of blasting works and blasted faces as well as length of time between subsequent blasting works were analysed and related to provocation effectiveness. The linear correlation and different regressions were calculated to determine these relations. Moreover, the seismic energy reduction in the rock mass was evaluated by means of SRMS Index, which is a factor measured directly before and after blasting. The analyses covered one mine panel in the Polkowice-Sieroszowice copper mine over four-year period.

Resilience Calculation of Process Plants Under Seismic Loading: A Case Study

2019 ◽  
Author(s):  
Bledar Kalemi ◽  
Antonio C. Caputo ◽  
Fabrizio Paolacci
Keyword(s):  
Seismic Event ◽  
Quantitative Measure ◽  
Economic Losses ◽  
Seismic Region ◽  
Damage Scenarios ◽  
South Italy ◽  
Process Plant ◽  
Process Plants ◽  
Operational Capacity

Abstract Earthquakes causes approximately 8% of total accidents in industrial facilities. Although there are several researches in literature pertaining to industrial resilience, none of them provides a modelling framework to quantify the seismic resilience of process plants. This paper presents a methodology for providing a quantitative measure of resilience and business economic losses for the process plants in case of a seismic event. The two main parameters which have utmost influence on the resilience of a process plant are operational capacity and recovery time, so they must be evaluated in proper way. Plant mapping and components vulnerability are the key modelling parameters of plant operational capacity. Exact recovery step functions are introduced based on General Reconstruction Activity Network (GRAN), considering interdependencies between plant components. In order to illustrate the discussed method, a nitric acid plant is set up as a case study. “PRIAMUS” software is used to generate the most probable damage scenarios, assuming the plant is located in seismic region of South Italy, Sicily. Ultimately, recovery curves are constructed for each damaged scenario, and business economic losses are calculated according to direct cost and business interruption. In short, this methodology provides a good estimation of the most critical components and economic losses of a process plant in case of a seismic event.

scholarly journals Collapse rates of reinforced concrete structures during large magnitude earthquakes: case study for Romania

2021 ◽  
Vol 3 (5) ◽  
Author(s):  
Florin Pavel
Keyword(s):  
Reinforced Concrete ◽  
Seismic Event ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Large Magnitude ◽  
Rc Structures ◽  
High Rise ◽  
The Moment ◽  
Water Tanks

AbstractThis case study focuses on the evaluation of the collapse rates of various types of reinforced concrete structures (residential and industrial) as observed from the data collected in Romania after the Mw 7.4 Vrancea earthquake of March 4, 1977. The results of the analyses show that the largest collapse rates were attributed to elevated reinforced concrete silos and water tanks. Moreover, the majority of the collapsed elevated reinforced concrete water tanks were full at the moment of the seismic event. Very small collapse rates were observed for high-rise residential RC structures and for the multi-storey industrial RC structures.

Three-component data as an aid to seismic event detection and association: a case study using data from the Sil (Iceland) network

1993 ◽  
Vol 19 (2) ◽  
pp. 123-134 ◽  
Author(s):  
R.G. Roberts ◽  
A. Lindfors ◽  
A. Christoffersson ◽  
R. Bödvarsson ◽  
S.Th. Rögnvaldsson
Keyword(s):  
Event Detection ◽  
Seismic Event ◽  
Seismic Event Detection ◽  
Using Data

SEISMIC ISOLATION OF HOSPITALS IN PERU: A CASE STUDY WITH DRAFT PERUVIAN CODE

2019 ◽  
Vol 3 (Special Issue on First SACEE'19) ◽  
pp. 225-232
Author(s):  
Joel Moscoso Tinco ◽  
Juan Alejandro Muñoz Pelaez
Keyword(s):  
Seismic Design ◽  
Seismic Isolation ◽  
Seismic Event ◽  
Design Procedure ◽  
Seismic Protection ◽  
Design Code ◽  
Isolation System ◽  
Seismic Design Code ◽  
Mandatory Use

Seismic isolation is a seismic protection technique for buildings which has been recently introduced in Peru. More than twenty seismically isolated buildings exist in Peru, at present. Seismic isolators in many of these buildings have been designed using foreign codes developed for foreign seismic conditions in the absence of local design code. These conditions may not accurately represent Peruvian seismicity. The mandatory use of seismic isolators in new major hospital buildings has been established recently in the Peruvian seismic design code. Available studies in Peru indicate that most health centres may be temporarily affected after a rare seismic event. The seismic isolation Peruvian code is being developed taking into account the needs and implications of Peruvian seismicity. This paper presents the design procedure of the seismic isolation system of a representative four storey reinforced concrete hospital block. The requirements of the draft code for seismic isolation and the current seismic code have been used. The design process and verification show reasonable response of the structure in terms of drifts and acceleration even after including maximum and minimum modification factors of properties for the seismic isolation bearings.

scholarly journals Case study on seismic tunnel response

2008 ◽  
Vol 45 (12) ◽  
pp. 1743-1764 ◽  
Author(s):  
Stavroula Kontoe ◽  
Lidija Zdravkovic ◽  
David M. Potts ◽  
Christopher O. Menkiti
Keyword(s):  
Hoop Stress ◽  
Seismic Event ◽  
Bending Moment ◽  
Field Observations ◽  
Stress Distributions ◽  
Wide Range ◽  
Dynamic Analyses ◽  
Under Construction ◽  
Dynamic Plane

This paper presents a case study of the Bolu highway twin tunnels that experienced a wide range of damage during the 1999 Duzce earthquake in Turkey. Attention is focused on a particular section of the left tunnel that was still under construction when the earthquake struck and that experienced extensive damage during the seismic event. Static and dynamic plane-strain finite element (FE) analyses were undertaken to investigate the seismic tunnel response at two sections and to compare the results with the post-earthquake field observations. The predicted maximum total hoop stress during the earthquake exceeds the strength of shotcrete in the examined section. The occurrence of lining failure and the predicted failure mechanism compare very favourably with field observations. The results of the dynamic FE analyses are also compared with those obtained by simplified methodologies (i.e., two analytical elastic solutions and quasi-static elastoplastic FE analyses). For this example, the quasi-static racking analysis gave thrust and bending-moment distributions around the lining that differed significantly from those obtained from full dynamic analyses. However, the resulting hoop stress distributions were in reasonable agreement.

ICONE19-44137 CASE STUDY OF THE SENSITIVITY OF STRUCTURAL RESPONSE TO SEISMIC EVENT PARAMETERS

2011 ◽  
Vol 2011.19 (0) ◽  
pp. _ICONE1944-_ICONE1944
Author(s):  
Michael C. Costantino ◽  
Greg E. Mertz ◽  
Thomas W. Houston ◽  
Carl J. Costantino ◽  
Andrew S. Maham
Keyword(s):  
Seismic Event ◽  
Structural Response

Spatio‐temporal behaviour after an earthquake: a case study of Kawaguchi town, Japan

2012 ◽  
Vol 21 (3) ◽  
pp. 370-385 ◽  
Author(s):  
Matteo Gismondi ◽  
Otto Huisman
Keyword(s):  
Disaster Management ◽  
Seismic Event ◽  
Geographical Location ◽  
Recovery Process ◽  
City Centre ◽  
Temporal Behaviour ◽  
Content Type ◽  
Spatio Temporal ◽  
The City

PurposeThe purpose of this paper is to provide a method to examine the differences in behaviour during a post‐quake period.Design/methodology/approachFieldwork and questionnaires were used to collect the households’ members’ movement behaviours after the 2004 Chuetsu Earthquake. In total, three study areas were selected in Kawaguchi town (Niigata Prefecture) in order to enhance how the visualisation process can provide support in better understanding the behaviour during evacuation and recovery process. For this purpose the Space‐Time‐Cube (STC) was used to represent and analyse residents’ movement paths over time.FindingsDifferences appear in the spatio‐temporal paths of the three study areas, implying a connection between the geographical location and movement patterns. The city centre shows disorganized Spatio‐Temporal‐Patterns (STPs) during the first week of the recovery process, eventually becoming organized after the rescuers’ arrival. Moving towards the isolated areas of the town, a progressive STP organisation can be observed, explaining the faster response after the seismic event.Research limitations/implicationsSpatio‐temporal data are difficult and costly to collect, especially if a long period of time passes between the seismic event and the survey.Practical implicationsThe STC can be used as tool to enhance the disaster management techniques and provide support in crisis situations.Originality/valueThe paper provides a practical approach to investigate the reactions after a seismic event and can be used in larger study areas to develop better strategies in disaster management.

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