بررسی پاسخ دینامیکی پی های سطحی تحت اثر انفجار ناشی از موشک های هوا به زمین و راه کارهای آن با رویکرد پدافند غیرعامل

نوع مقاله : مقاله پژوهشی

نویسنده

استادیار، دانشگاه هوایی شهید ستاری

چکیده

امروزه با توجه به افزایش حملات تروریستی در سرتاسر دنیا و محتمل بودن حملات هوایی و موشکی در شهرها و ساختمان­ها و همچنین  امکان بمب­گذاری در اماکن شهری، طراحی ساختمان­ها در مقابل بارهای ناشی از انفجار، از دیدگاه پدافند غیرعامل مورد توجه ویژه­ای قرار گرفته است. بنابراین، ارائه راه­کار ضد عوامل تخریب­گر که مستقیما مرتبط با جان مردم است امری حیاتی محسوب می­شود. در این پژوهش ابتدا تاثیرات ناشی از انفجار موشک S-24 با تغییر در پارامترهای فاصله مرکز انفجار از پی و نسبت مدفون شدگی پی­های سطحی به روش تفاضل محدود با استفاده از نرم­افزار FLAC  بررسی­شده سپس دو راه حل مناسب به لحاظ اقتصادی و اجرایی و با رویکرد پدافند غیرعامل ارائه گردیده است. راه حل اول استفاده از کامپوزیت­های پلیمری پایه کربنی CFRP و راه حل دوم استفاده از روش میکروپایل به­عنوان المان حائل در مدل­سازی می­باشد. پس از بررسی­های صورت­گرفته در مدل سازی­های عددی مشخص گردید که راه­حل­های ارائه­شده به­ترتیب 35 و 56 درصد از بیشترین تغییر مکان­های به­وجود آمده در پی را می­کاهند.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation of Dynamic Response of Shallow Foundations Against Blast Loading Under Air-to-Ground Rockets and it’s Solutions with Passive Defense Approach

نویسنده [English]

  • Gh. Jafari
sattari shahid university
چکیده [English]

During recent years, from passive defense point of view, owing to increasing terrorist attacks and likelihood of air and missile attacks and bomb explosion in urban areas, building design against blast loads has received special attention. Consequently, offering a solution for dealing with destructive agents is a vital issue since it is related to human life. In this study, first the effects of   S-24 rocket explosion is evaluated with FLAC software, using finite difference method by making changes in two parameters; namely shallow foundation embedment ratio and the distance between the center of explosion and footing. Two appropriate solutions have been offered with passive defense approach in terms of economy and operation. The first solution is utilizing Carbon fiber reinforced polymer (CFRP) and the second one is employing Micropile technique which is regarded as a retaining element in modeling. Analyzing results of conducted numerical simulations in this study revealed that the presented solutions decrease the maximum footing displacements 30 and 40 centimeters, respectively.         

کلیدواژه‌ها [English]

  • Blast loading
  • Shallow Foundation
  • CFRP Composites
  • Micropile
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