ارزیابی ریسک‌های امنیتی پل‌ها در شرایط عدم قطعیت توپولوژی شبکه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه مهندسی عمران، دانشگاه آزاد اسلامی، واحد اهواز

2 گروه عمران، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران

3 دانشیار ، استاد مدعو گروه مهندسی عمران، دانشگاه آزاد اسلامی، واحد اهواز، و هیئت علمی دانشکده فنی دانشگاه لرستان، خرم آباد

چکیده

مدل‌های ارائه شده جهت ارزیابی ریسک‌های امنیتی پل‌ها به‏طور کلی از الگوی حاصل‌ضرب سه عامل احتمال وقوع (O)، آسیب‌پذیری (V) و اهمیت (I) پیروی می‌کنند. در این مقاله، به پارامتر اهمیت پل (I) و تغییرات آن ناشی از عدم قطعیت توپولوژی شبکه طی برنامه‌های توسعه شبکه در آینده پرداخته می‌شود. برای سنجش و مقایسه اهمیت نسبی پل‌ها، دو گروه شاخص‌های اهمیت فردی و اهمیت شبکه‌ای پل‌ها مورد توجه قرار گرفت. با توجه به این که ویژگی‌های شبکه‌ای پل‌ها در طی توسعه شبکه تغییر می‌کنند‌، جهت مقایسه رویکردهای مختلف تصمیم‌گیری در انتخاب پل‌ها، یک مطالعه موردی انجام شد. در این مطالعه، شبکه حمل و نقل درون شهری اهواز مورد بررسی قرار گرفت. نتایج حاصل از این مطالعه موردی نشان داد که اهمیت برخی از پل‌های شبکه طی توسعه آن در آینده تغییر می‌کند. به عنوان نمونه، پل‌ B3 که در وضعیت اولیه شبکه جزء پل‌های با اهمیت نبود، طی روند توسعه جزء پل‌های با اهمیت قرار گرفت. در مقابل، در پل‌ B5، میزان اهمیت نسبی در ابتدا زیاد بود، اما طی روند توسعه اهمیت نسبی آن کاهش یافته و از سبد پل‌های با اهمیت خارج گردید. همچنین، ملاحظه شد که شماری از پل‌ها مانند B1، B6 و B7 همواره با اهمیت هستند و در هیچ دوره‌ای از سبد پل‌های با اهمیت خارج نمی‌شوند. در مقابل، پل‌هایی مثل B4 همواره کم‌اهمیت محسوب می‌شوند و تغییرات شبکه در هیچ دوره‌ای سبب قرارگیری آن‌ها در بین پل‌های با اهمیت نمی‌شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Bridges security risk assessment considering uncertainty in network topology

نویسندگان [English]

  • Mehdi Dezfuli Nezhad, 1
  • Reza Raoufi 2
  • َAhmad Dalvand 3
1 Department of Civil Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
2 Department of Civil Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
3 assistant professor of engineering lorestan university
چکیده [English]

The proposed models to assess the security risks of bridges are generally designed based on the product of three-factor: probability (O), vulnerability (V), and importance (I). In this paper, the importance of bridge (I) and its changes due to the uncertainty of network topology during future network development programs were discussed. To measure and compare the relative importance of bridges, two groups of unique importance and the network-based importance of bridges were considered. Given that the network-based characteristics of bridges change during network development, a numerical example was presented to compare different decision-making approaches in selecting bridges (with and without considering the changes in the importance of bridge networks due to network changes). In this example, the Ahwaz inter-city transportation network was examined. The results showed that some bridges, such as B3, which were not important in the initial, became important during the development process. In contrast, in some bridges, such as B5, the relative importance was high at first, but during the development process, their relative importance decreased. It was also observed that a number of bridges such as B1, B6, and B7 are always important. In contrast, bridges such as B4 are always considered insignificant and network changes do not place them among the important bridges in any period.

کلیدواژه‌ها [English]

  • Security Risks
  • Resource Allocation
  • Bridges Importance
  • Topology
  • Transportation Network

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  • تاریخ دریافت: 28 شهریور 1400
  • تاریخ بازنگری: 31 فروردین 1401
  • تاریخ پذیرش: 06 تیر 1401

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