IJE TRANSACTIONS C: Aspects Vol. 31, No. 6 (June 2018) 932-942   

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H. R. Rezaei, H. Khademi Zare, M. Bashiri and M. B. Fakhrzad
( Received: April 17, 2017 – Accepted in Revised Form: February 27, 2018 )

Abstract    Disasters inevitably trigger far-reaching consequences affecting all living things and the environment. Therefore, top managers and decision-makers in disaster management seek comprehensive approaches to evaluate facilities and network preparedness in dealing with the response phase of predicted disaster scenarios in terms of number of casualties, costs, and unmet demands. In this regard, previous studies on the preparedness phase have often been limited to the location of eligible facilities without considering other important factors such as current assets, entities and configuration. Thus, the present study proposes a reconfiguring and repositioning model in order to simultaneously assess whether existing support bases should remain, be consolidated or phased out as well as whether new support base facilities should be established and subsequently supply and demand requirements considered. In the proposed model, in addition to considering a scenario tree for destruction and demands, network links affected by the intensity of disaster events are also evaluated. Furthermore, in order to increase reliability, the destruction of network links takes into account that link failures give rise to vulnerability in related links. In the proposed model, multi-stage stochastic programming has been implemented on various real destruction and demand scenarios. The results indicate definite advantages in the re-positioning or reconfiguring model compared with current configurations. Moreover, the superior capability of the applied solving approach versus one of the traditional approaches is also appraised.


Keywords    Disaster Management, Re-configuring, Re-positioning, Preparedness Facility, Multi-stage Stochastic Programming, Scenario Tree, Link Damage.


چکیده    بحران ها همواره و بی تردید اثرات و پیامدهای انسانی و غیر انسانی جدی را ایجاد می نمایند به نحوی که مدیران و تصمیم سازان کلان این حوزه به دنبال رویکردهایی برای ارزیابی سطح آمادگی کنونی پیکره بندی تسهیلات خود از نظر میزان تلفات، هزینه ها و تقاضاهای برآورده نشده در مواجهه با بحران پیش بینی شده در برنامه ریزی فازهای آمادگی و پاسخ می باشند. در این راستا، تحقیقات کنونی در فاز آمادگی اغلب محدود به مکان یابی تسهیلات جدید بدون توجه و ملاحظه ی دارایی ها، موجودیت ها و پیکره بندی های موجود می باشد. در این مقاله، یک مدل موقعیت یابی یا پیکره بندی مجدد پیشنهاد شده است تا به طور همزمان در خصوص نگهداری یا بستن تسهیلات کنونی نگهداری و توزیع اقلام امداد در مراکز پشتیبانی، احداث تسهیلات جدید، نحوه ی ادغام تسهیلات بلا استفاده با سایر تسهیلات فعال و همچنین نحوه جریان امداد میان سطوح تامین کنندگان، مراکز پشتیبان (مراکز توزیع) و نقاط تقاضا تصمیم سازی گردد. در مدل پیشنهادی، علاوه بر ملاحظه ی یک درخت سناریو برای ویرانی های زلزله و تقاضاها، لینک های شبکه نیز تحت تاثیر شدت رخدادهای بحران در درخت سناریو قرار می گیرند. بنابراین، تخریب لینک ها به نحوی در نظر گرفته شده اند که لینک های خراب و ویران منجر به بسته شده نزدیک ترین لینک ها با مقاومت کمتر خواهند شد. به منظور حل مدل، یک رویکرد برنامه ریزی چند مرحله ای تصادفی بر دو مسئله با سناریوهای تخریب و تقاضاهای واقعی اعمال گردیده است. نتایج، برتری محسوس را در پیکره بندی مجدد پیشنهادی در قیاس با پیکره بندی موجودنشان می دهد. همچنین بهبود بکارگیری روش برنامه ریزی تصادفی چند مرحله ای در مقابل یکی از روش های سنتی نیز مورد بررسی قرار گرفته است.


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