Blar i forfatter Artikler, rapporter og annet (teknologi og sikkerhet) "Ashrafi, Behrooz"

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    • Drone-based Bridge Inspection in Harsh Operating Environment: Risks and safeguards 

      Aliyari, Mostafa; Ashrafi, Behrooz; Ayele, Yonas Zewdu (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-30)
      The inability to effectively and systematically identify and measure the damage in bridges will lead to an acceleration and dangerous deterioration of the health state of these structures. To repair and replace the aging and damaged bridge infrastructures, and prevent catastrophic bridge collapse, there is an urgent need to develop reliable, innovative, and efficient approaches to the performance ...

    • Hazards identification and risk assessment for UAV– assisted bridge inspections 

      Aliyari, Mostafa; Ashrafi, Behrooz; Ayele, Yonas Zewdu (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-07)
      Unmanned Aerial Vehicles (UAV) technology has found its way into several civilian applications in the last 20 years, predominantly due to lower cost and tangible scientific improvements. In its application to structural bridge inspection, UAVs provide two main functions. The first, being the most common, detect damage through visual sensors. The 2 D image data can be used to quickly establish a basic ...

    • A Methodological Framework for the Resilience Analysis of Road Transport Networks Exposed to Freezing Rain 

      Ashrafi, Behrooz; Naseri, Masoud; Di Maio, Francesco P.; Zio, Enrico (Conference object; Konferansebidrag, 2022)
      Road transport network is one of the major critical infrastructures to be maintained resilient, since its disruption would not only have direct economic consequences, but it could also lead to domino effects on other critical infrastructures. This study proposes a methodological framework for the analysis of the resilience of road transport networks exposed to natural hazards, in particular to ...

    • Preliminary Hazard Analysis for UAV-assisted Bridge Inspection 

      Ayele, Yonas Zewdu; Ashrafi, Behrooz (Journal article; Tidsskriftartikkel; Peer reviewed, 2020)
      Unmanned aerial vehicle (UAV) technology has found its way into a number of civilian applications in the last 20 years, predominantly due to lower costs and tangible scientific improvements. In its application to structural bridge inspection, UAVs provide two main functions. The first, being the most common, detects damage through visual sensors. The 2D imagery data can be used to quickly ...

    • Resilience of a transportation network: Importance of vulnerable nodes 

      Ashrafi, Behrooz; Naseri, Masoud; Barabady, Javad (Conference object; Konferansebidrag, 2022)
      Transportation Infrastructure is one of key critical infrastructures which are crucial for a wellfunctioning modern society. This study proposes a resilience-oriented framework for analyzing and ultimately mitigating risk and improving resilience for land transportation networks with a focus on vulnerable nodes. The framework uses network theory and considers the concept of independent pathways, ...