Photogrammetry and geographic information systems for quick assessment, documentation and analysis of earthquakes

Altan, Orhan; Toz, Gonul; Külür, Sıtkı; Şeker, Dursun Zafer; Volz, Steffen; Fritsch, Dieter; Sester, Monika

doi:10.1016/s0924-2716(01)00025-9

Cited by 33 publications

(25 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They note that six of the school buildings for which the residual plastic deformation capacity was estimated to be adequate, had to be decommissioned due to their large residual drift which exceeded 2%. Altan et al (1998Altan et al ( , 2001) present application of photogrammetric data acquisition technologies to measure the residual deformations of earthquake damaged buildings. Their primary objective is to provide a consistent basis for the damage documentation.…”

Section: Damage Observationsmentioning

confidence: 99%

“…Application of such techniques to document the extent of seismic damage to reinforced concrete buildings is reported in the literature (e.g. Altan et al (2001)). The accuracy of the measurements on the deformed state of the structure is influenced by several factors such as: (1) the adopted photogrammetric measurement technique, (2) the site conditions and, (3) the complexity of the deformation pattern of the structure.…”

Section: Updating the Estimatesmentioning

confidence: 99%

See 1 more Smart Citation

The use of post-earthquake residual displacements as a performance indicator in seismic assessment

Yazgan

Dazio

2011

Georisk: Assessment and Management of Risk for Engineered Syste

View full text Add to dashboard Cite

PrefaceModern performance based earthquake engineering addresses design, evaluation, construction, maintenance and decommission of structures and requires that their performance during an earthquake can be predicted with a known degree of accuracy. In this framework the importance of residual displacements is twofold: On one hand they represent a significant source of damage affecting mainly the serviceability and the repairability of the structure. On the other hand, after an earthquake, residual displacements are often the only measurable indicator of the shaking occurred during the earthquake. In the framework of a pre-earthquake design or assessment process, the expected residual displacements need to be predicted; while during a post-earthquake assessment the actual residual displacements can be measured.Within his present doctoral dissertation, Mr. Yazgan developed and validated against experimental evidence a new and original methodology to improve the estimate of maximum deformations occurred during an earthquake taking into account both observable damage and measurable residual displacements. The methodology is based on the Bayesian probabilistic theory and, as a particular novelty, explicitly considers model error. To estimate model error Mr. Yazgan carried out a very extensive study on the numerical modelling of structures under earthquake, which also allowed the formulation of practical modelling recommendations. The quantification of model error is of course of fundamental importance also for any realistic pre-earthquake prediction of residual displacements.The thorough and comprehensive work presented by Mr. Yazgan allows a deep understanding of the challenges relevant to the use of residual displacements in the seismic performance assessment of structures and his developments represent a new effective way to achieve this important goal. Zurich, January 2010Dr. Alessandro Dazio SummarySafety assessment of damaged structures is a pivotal part of the post-earthquake recovery process. As a result of the deformation histories that have occurred during the damaging earthquake, the key structural properties of the columns, beams and walls that contribute to the seismic resistance change. The key structural properties include stiffness, strength and deformation capacity. An accurate estimation of the residual key structural properties is crucial in identifying vulnerability of the damaged structure.These residual structural properties are known to be strongly dependent on the maximum deformations that have occurred. A new post-earthquake assessment method is developed following this premise. After an earthquake, the maximum deformations experienced by a damaged structure can be estimated using the developed method.The essential idea behind the method is to probabilistically estimate the experienced maximum deformations based on the post-earthquake residual displacements and the visible structural damage. The major uncertainties related to the estimated maximum deformations are explicitly treated in the me...

show abstract

Section: Damage Observationsmentioning

confidence: 99%

Section: Updating the Estimatesmentioning

confidence: 99%

The use of post-earthquake residual displacements as a performance indicator in seismic assessment

Yazgan

Dazio

2011

Georisk: Assessment and Management of Risk for Engineered Syste

View full text Add to dashboard Cite

show abstract

“…Much research has focused on remote-sensing-based damage inventorization (for a recent overview see Dell'Acqua and Gamba, 2012), while work focusing on assessing building safety is comparatively scarce. Altan et al (2001) used ground-based photogrammetry to determine critical damage and deformation that may compromise structural integrity, though in an approach that required entering a potentially unstable structure. Schweier and Markus (2006) analysed 3-D CAD models derived from laser scanning data to identify geometric changes between preand post-disaster buildings, including volume or height reduction, as well as orientation changes, which were linked to stability.…”

Section: Overview Of Previous Workmentioning

confidence: 99%

Mobile augmented reality in support of building damage and safety assessment

Kim

Kerle

Gerke

2016

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. Rapid and accurate assessment of the state of buildings in the aftermath of a disaster event is critical for an effective and timely response. For rapid damage assessment of buildings, the utility of remote sensing (RS) technology has been widely researched, with focus on a range of platforms and sensors. However, RS-based approaches still have limitations to assess structural integrity and the specific damage status of individual buildings. Structural integrity refers to the ability of a building to hold the entire structure. Consequently, ground-based assessment conducted by structural engineers and first responders is still required. This paper demonstrates the concept of mobile augmented reality (mAR) to improve performance of building damage and safety assessment in situ. Mobile AR provides a means to superimpose various types of reference or pre-disaster information (virtual data) on actual post-disaster building data (real buildings). To adopt mobile AR, this study defines a conceptual framework based on the level of complexity (LOC). The framework consists of four LOCs, and for each of these, the data types, required processing steps, AR implementation and use for damage assessment are described. Based on this conceptualization we demonstrate prototypes of mAR for both indoor and outdoor purposes. Finally, we conduct a user evaluation of the prototypes to validate the mAR approach for building damage and safety assessment.

show abstract

“…Based on this type of remote sensing, it is possible to provide management guidelines for immediate action (Altan et al, 2001), or to construct a long-term management strategy to mitigate human impacts. For instance, in ecological footprint Figure 1.…”

Section: Monitoring Land-cover Patterns and Disastersmentioning

confidence: 99%

“…However, more applied possibilities such as GIS-based (disaster) management now becomes more and more widespread (e.g. Salvi et al, 1999;Altan et al, 2001;Guptill, 2001;Venkatachary et al, 2001). At the level of organising new satellites for improved remote sensing, an emphasis should be put on international collaboration in order to reduce the cost of the space-borne missions (Bailey et al, 2001).…”

Section: Integration Of Past Present and Future Remote Sensing Studiesmentioning

confidence: 99%

Untitled

Dahdouh‐Guebas

2002

Environment, Development and Sustainability

104

View full text Add to dashboard Cite

Abstract. The sustainable use and management of important tropical coastal ecosystems (mangrove forests, seagrass beds and coral reefs) cannot be done without understanding the direct and indirect impacts of man. The ecosystem's resilience and recovery capacity following such impacts must be determined. The efficacy of mitigation measures must also be considered. Remote sensing and geographic information systems (GIS) are excellent tools to use in such studies. This paper reviews the state of the art and application of these tools in tropical coastal zones, and illustrates their relevance in sustainable development. It highlights a selected number of remote sensing case-studies on land cover patterns, population structure and dynamics, and stand characteristics from South-East Asia, Africa and South-America, with a particular emphasis on mangroves. It further shows how remote sensing technology and other scientific tools can be integrated in long-term studies, both retrospective and predictive, in order to anticipate degradation and to take mitigating measures at an early stage. The paper also highlights the guidelines for sustainable management that can result from remote sensing and GIS studies, and identifies existent gaps and research priorities.There is a need for more comprehensive approaches that deal with new remote sensing technologies and analysis in a GIS-environment, and that integrate findings collected over longer periods with the aim of prediction. It is also imperative to collect and integrate data from different disciplines. These are essential in the spirit of sustainable development and management, particularly in developing countries, which are often more vulnerable to environmental degradation.

show abstract

Photogrammetry and geographic information systems for quick assessment, documentation and analysis of earthquakes

Cited by 33 publications

References 1 publication

The use of post-earthquake residual displacements as a performance indicator in seismic assessment

The use of post-earthquake residual displacements as a performance indicator in seismic assessment

Mobile augmented reality in support of building damage and safety assessment

Untitled

Contact Info

Product

Resources

About