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1 – 10 of 241Jun Zhang, Zuqiang Liu, Yanjie Liu and Yong Liu
The purpose of this paper is to apply grey statistical model to identify and classify live fault rupture.
Abstract
Purpose
The purpose of this paper is to apply grey statistical model to identify and classify live fault rupture.
Design/methodology/approach
Based on grey statistical mode, this paper uses eight faults' ripping speed observation data from 1997 to 2001, according to the grey statistics method for analysis, and recognizes active fault rupture situation. Using the conventional methods, namely taking all faults monitoring stations' average dislocation rate to analysis and make judgment, the average results are obtained.
Findings
The results show that the results are closer to reality because the grey statistical evaluation method has considered dislocation rate and other discrete factors.
Practical implications
The method exposed in the paper can be used to monitor and recognize live fault rupture in earthquake prediction.
Originality/value
According to the fault dislocation rate, this paper advances active fault rupture identification and classification method based on grey statistical model.
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Faisal Mehraj Wani, Jayaprakash Vemuri and Rajaram Chenna
The objective of the study is to examine the response of reinforced concrete (RC) structures subjected to Near-Fault Ground Motions (NFGM) and highlight the importance of…
Abstract
Purpose
The objective of the study is to examine the response of reinforced concrete (RC) structures subjected to Near-Fault Ground Motions (NFGM) and highlight the importance of considering various factors including the influence of the relative geographical position of near-fault sites that can affect the structural response during an earthquake.
Design/methodology/approach
In this paper, the response of a four-storey RC building subjected to NFGMs with varied characteristics like hanging wall and footwall in conjunction with directivity and the effect of pulse-like ground motions with rupture direction are investigated to understand the combined influence of these factors on the behavior of the structure. Furthermore, the capacity and demand of the structural element are investigated for computing the performance ratio.
Findings
Results from this study indicate that the most unfavorable combinations for structural damage due to near-fault ground motion are the hanging wall with forward rupture, the fault normal component of ground motions, and pulse-like ground motions with forward directivity.
Originality/value
The results from this study provide valuable insight into the response of RC structures subjected to NFGM and highlight the importance of considering various factors that can affect the structural response during an earthquake. Moreover, the computation of capacity and demand of the critical beam indicates exceedance of desired limits, resulting in the early deterioration of the structural elements. Finally, the analytical analysis from the present study confirms that the hanging wall with forward ruptures, pulse-like motions, and fling steps are the most unfavorable combinations for seismic structural damage.
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Prabhat Kumar, Ashwini Kumar and Amita Sinvhal
For a state like Uttarakhand, which is located in the seismically active Himalayan region and in the vicinity of plate boundaries, estimation of seismic hazards and the…
Abstract
Purpose
For a state like Uttarakhand, which is located in the seismically active Himalayan region and in the vicinity of plate boundaries, estimation of seismic hazards and the preparation of a zoning map are an urgent necessity. This paper aims to focus on this hazard.
Design/methodology/approach
In total, 32 potential seismo‐tectonic source zones were identified in a very wide area in and around the state, on the basis of seismicity and tectonics, and the longer ones were segmented. The maximum magnitude that each seismo‐tectonic source zone can support was then estimated. The seismic hazard due to each seismo‐tectonic source zone was assessed at 180 sites, in terms of peak ground acceleration (PGA).
Findings
The maximum PGA at each site varied between 0.06g and 0.50g. The seismic hazard was highest around the main central thrust and the main boundary thrust, and five other thrusts between these two thrusts. This assessment was adapted to make a seismic zoning map of Uttarakhand, with five distinct zones.
Research limitations/implications
If seismo‐tectonic source zones from the contiguous regions of Nepal and Tibet were included as part of this assessment, then a higher hazard would be expected in Uttarakhand.
Practical implications
Threat perceptions of a potential earthquake disaster can be assessed in this zoning map. Disaster mitigation strategies will vary geographically, with priorities defined by the zoning map presented here. The methodology evolved has the potential to be extended to other vulnerable states in the Himalayan arc.
Originality/value
The seismic hazard assessed has been adapted to formulate a seismic zoning map of Uttarakhand.
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The purpose of this paper is to explore the effects of place attachment and risk perception with bounded rationality on the willingness to live in a high-earthquake-risk area.
Abstract
Purpose
The purpose of this paper is to explore the effects of place attachment and risk perception with bounded rationality on the willingness to live in a high-earthquake-risk area.
Design/methodology/approach
The study establishes a hypothetical model on the basis of the theory of planned behavior, place attachment and risk perception. A structural equation model (SEM) measures the relationships between the variables.
Findings
Place attachment affects individuals and their preferences; it makes them willing to continue living in high-earthquake-risk areas. Additionally, risk perception with bounded rationality (fatalism and optimism bias) might make people believe there is only a slight risk of physical injury or property damage. The overall findings moderately suggest that land-use regulations along fault zone areas are not necessarily driving households away, and such allowance of residential use in the current zoning regulation might mislead people that it is a safe area.
Research limitations/implications
This study uses questionnaires in fault zone-regulated areas where only the fault line has zoning regulations. In addition, the application of SEM has to build upon theory and further examine both direct and indirect effects. The assessment criteria of the model might be limited by the sample amount, causing certain model-fitting results, which are not that significant. The overall findings might be limited by the geographical location and cannot be generalized to other areas in Taiwan.
Practical implications
A more thorough assessment of land-use planning in earthquake-risk areas should consider households’ risk perceptions and adaptation behaviors.
Originality/value
Land-use regulations along fault zone areas might reveal earthquake risk in such areas or mislead people that it is a safe area. Place attachment and risk perceptions might affect individuals’ judgments of whether such risk exists or not. The results could be referred to disaster management in high-earthquake-risk areas.
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The purpose of this paper is to present an integrative review of the literature to understand the underlying risks of tectonic plate movements, earthquakes and possible earth…
Abstract
Purpose
The purpose of this paper is to present an integrative review of the literature to understand the underlying risks of tectonic plate movements, earthquakes and possible earth tremors on Bangladesh as a country filled with waterways.
Design/methodology/approach
This study presents a review of seismic activities to present an overview of the active tectonic architecture of the region and its seismic potential with past consequence in Bangladesh region and its immediate surroundings. For the purpose of this review, peer-reviewed journals and electronic databases are the main sources for identifying studies, along with conference proceedings from the similar events and networks.
Findings
Review reveals that Bangladesh sits on three tectonic plates atop the world’s largest river delta and has blind faults, shallow faults and high amplified liquefiable zones. It has experienced few devastating earthquakes but most of the records are not documented and also a lack of proper seismic equipment could not record all the events. Also Bangladesh is ill prepared to tackle the aftermath of any strong earthquake and if an earthquake with 7 Mw or greater magnitude occurred, it would leave Bangladesh blighted by a catastrophic disaster with significant destruction of infrastructure, fire outbreaks resulting from breakdown of gas piping systems, fire from collapsed electrical lines and disruption of water connections both in urban and rural centres with greater impact on industrial cities that may not have adhered to standard building codes.
Originality/value
This paper outlined the necessity of an earthquake hazard catalogue, also preparation in sense of seismic risk mitigation and influence of decision-makers, policy institutes and professionals in ensuring infrastructure development and the building code provides for a safe environment and resilient buildings that can reduce or eliminate the risks.
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Annisa Triyanti, Gusti Ayu Ketut Surtiari, Jonatan Lassa, Irina Rafliana, Nuraini Rahma Hanifa, Mohamad Isnaeni Muhidin and Riyanti Djalante
This paper aims to identify key factors for a contextualised Systemic Risk Governance (SRG) framework and subsequently explore how systemic risks can be managed and how local…
Abstract
Purpose
This paper aims to identify key factors for a contextualised Systemic Risk Governance (SRG) framework and subsequently explore how systemic risks can be managed and how local institutional mechanisms can be tweaked to deal with the complex Indonesian risk landscape.
Design/methodology/approach
Using a case study from Palu triple-disasters in Central Sulawesi, Indonesia, the authors demonstrate how inland earthquakes in 2018 created cascading secondary hazards, namely tsunamis, liquefactions and landslides, caused unprecedented disasters for the communities and the nation. A qualitative analysis was conducted using the data collected through a long-term observation since 2002.
Findings
The authors argue that Indonesia has yet to incorporate an SRG approach in its responses to the Palu triple-disasters. Political will is required to adopt more appropriate risk governance modes that promote the systemic risk paradigm. Change needs to occur incrementally through hybrid governance arrangements ranging from formal/informal methods to self- and horizontal and vertical modes of governance deemed more realistic and feasible. The authors recommend that this be done by focusing on productive transition and local transformation.
Originality/value
There is growing awareness and recognition of the importance of systemic and cascading risks in disaster risk studies. However, there are still gaps between research, policy and practice. The current progress of disaster risk governance is not sufficient to achieve the Sendai Framework for Disaster Risk Reduction (2015–2030) unless there is an effective governing system in place at the local level that allow actors and institutions to simultaneously manage the interplays of multi-hazards, multi-temporal, multi-dimensions of vulnerabilities and residual risks. This paper contributes to these knowledge gaps.
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Mahta Mirmoghtadaee, Mohammad Hamed Abdi and Mohammad Saber Eslamlou
This study aims to develop the application of the strategic choice approach (SCA) in Karaj City (Iran) as the case study for facilitating the decision-making process concerning…
Abstract
Purpose
This study aims to develop the application of the strategic choice approach (SCA) in Karaj City (Iran) as the case study for facilitating the decision-making process concerning uncertainties associated with determining fault trace, fault buffer zone and fault setback, as well as inherent uncertainties related to urban issues – known as wicked problems – which make a clear definition unachievable for them.
Design/methodology/approach
The SCA was recycled in this study to manage uncertain situations in planning. It is designed to deal with problems caused by uncertainty, insufficient knowledge and unpredictable policy outcomes. In combination with the risk-based planning approach, the paper proposes a new model to deal with uncertainty and hazard risk at the same time.
Findings
The results indicated that such decision-making tools are helpful for urban planners who impose changes in the fault zone to save lives and properties where the process seems problematic and ambiguous. Further analysis from the SCA development not only shows that urban planning restrictions should be applied gradually and in pace with the completion of fault displacement geological data but also reveals that defining the implementation process and institutional structure is as important as the preparation of binding fault zoning documents.
Originality/value
The paper will push forward global research and practice because the results can be generalized for use in other earthquake-prone countries, as the considerations and obstacles have a universal character and more specifically because many earthquake-prone countries have not started to define fault avoidance zone restrictions up to now.
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Casey Pennington, Karen Wohlwend, Summer J. Davis and Jill Allison Scott
This paper aims to examine tensions around play, performance and artmaking as becoming in the mix of expected and taken-for-granted discourses implicit in an after-school ceramics…
Abstract
Purpose
This paper aims to examine tensions around play, performance and artmaking as becoming in the mix of expected and taken-for-granted discourses implicit in an after-school ceramics makerspace (Perry and Medina, 2011). The authors look closely at one adolescent girl’s embodied performance to see how it ruptures the scripts for compliant bodies in the after-school program. While these performances take place out-of-school and in an arts studio, the tensions and explorations also resonate with broader issues around student embodied, performative and becomings that run counter to normalized school expectations.
Design/methodology/approach
A contemporary approach to nexus analysis (Medina and Wohlwend, 2014; Wohlwend, 2021) unpacked two critical performative encounters (Medina and Perry, 2011) using concepts of historical bodies (Scollon and Scollon, 2004) informed by sociomaterial thing-power (Bennett, 2010).
Findings
Playing while painting pottery collides and converges with the tacitly desired and expected ways of embodying student in this after-school artspace. Emily’s outer-space alien persona ruptured expected discourses when her historical body and embodied performances threatened other children. While her embodied performances facilitated her becoming a fully present participant in the studio, she fractured the line between play and reality in violent ways.
Originality/value
As literacy researchers, the authors are in a moment of reckoning where student embodied performances and historical bodies can collide with all-too-real violent threats in daily lives and community locations. Situating these performances in the nexus of embodied literacies, unsanctioned play and thing-power can help educators respond to these moments as ruptures of tacit expectations for girlhoods in school-like spaces.
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The purpose of this paper is to present an assessment of the potential tsunamigenic seismic hazard to Sri Lanka from all active subduction zones in the Indian Ocean Basin.
Abstract
Purpose
The purpose of this paper is to present an assessment of the potential tsunamigenic seismic hazard to Sri Lanka from all active subduction zones in the Indian Ocean Basin.
Design/methodology/approach
The assessment was based on previous studies as well as past seismicity of the subducion zones concerned.
Findings
Accordingly, four seismic zones capable of generating teletsunamis that could reach Sri Lanka have been identified, namely, Northern Andaman‐Myanmar, Northern Sumatra‐Andaman and Southern Sumatra in the Sunda trench and Makran in the Northern Arabian Sea. Moreover, plausible worst‐case earthquake scenarios and respective fault parameters for each of these seismic zones have been recommended.
Research limitations/implications
However, other potential tsunami sources such as seismic activity in the near‐field, submarine landslides and volcanic eruptions have not been considered.
Practical implications
Numerical simulations of tsunami propagation have been carried out for each of the four scenarios in order to assess the potential impact along the coastline of Sri Lanka. Such information relating to the spatial distribution of the likely tsunami amplitudes and arrival times for Sri Lanka would help authorities responsible for evacuation to make a better judgment as to the level of threat in different areas along the coastline, and act accordingly, if a large earthquake were to occur in any of the subduction zones in the Indian Ocean.
Originality/value
In the absence of comprehensive probabilistic assessments of the tsunami hazard to Sri Lanka, this paper's recommendations would provide the necessary framework for the development of deterministic tsunami hazard maps for the shoreline of Sri Lanka.
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