مقاوم‌سازی درب‌ سازه‌های امن با استفاده از ساختارهای هندسی چند قوسی

صالحی, حسن

مقاوم‌سازی درب‌ سازه‌های امن با استفاده از ساختارهای هندسی چند قوسی

نوع مقاله : عمران - سازه

نویسنده

حسن صالحی

استادیار دانشگاه پدافند هوایی خاتم الانبیاء(ص)، تهران، ایران

چکیده

در مقاله حاضر عملکرد درب‌های چند قوسی در برابر انفجار با استفاده از مدل‌سازی در نرم‌افزار المان محدود ال‌اس‌داینا مورد بررسی قرار گرفته است. استفاده از ساختار چند قوسی علاوه بر کاهش وزن، حجم مصالح و در نتیجه کاهش هزینه تأمین و ساخت درب، باعث توزیع یکنواخت‌تر تنش و کاهش تمرکز تنش در مقایسه با درب‌های رایج با سطح صاف می‌گردد. پارامترهای مورد بررسی در این تحقیق شامل تعداد قوس، ارتفاع قوس، وزن ماده منفجره، تأثیر انفجارات حوزه دور، ابعاد کلی درب، مصالح مورداستفاده در ساخت درب و نوع سخت‌کننده مورداستفاده جهت افزایش مقاومت آن است. نتایج مدل‌سازی عددی نشان می‌دهد که با افزایش تعداد قوس از 1 تا 5 قوس، حداکثر جابجایی ایجادشده در مرکز درب تا حدود 86% کاهش پیدا می‌کند. با افزایش ارتفاع قوس از 5 به 10 و 20 سانتی‌متر، بر اساس تعداد قوس‌های مختلف، حداکثر جابجایی مرکز درب بین 5 و 32 درصد کاهش می‌یابد. در میان روش‌های مختلف مقاوم‌سازی درب، استفاده از رویه چند قوسی، افزایش بیشتری در مقاومت ایجاد می‌کند. این روش با مصرف فولاد کمتری این مقاومت را ایجاد کرده و دارای صرفه اقتصادی بیشتری است.

کلیدواژه‌ها

20.1001.1.26762935.1401.13.3.6.3

موضوعات

عمران- سازه

عنوان مقاله [English]

Reinforcing Doors of the Safe Constructions Using Multi-Arch Geometric Structures

نویسنده [English]

Hasan Salehi

Khatam Ol Anbia university

چکیده [English]

In the present paper, the performance of multi-arched doors against explosion has been investigated using modeling in the LSDYNA finite element software. The use of multi-arch structure, in addition to reducing the weight and volume of materials and as a result reducing the cost of providing and building the door, causes a more uniform distribution of stress and reduces the concentration of stress in comparison with common doors with a smooth surface. The parameters investigated in this research include the number of arcs, the height of the arc, the weight of the explosive, the effect of far-field explosions, the overall dimensions of the door, the materials used in the construction of the door, and the type of hardener used to increase its resistance. The numerical modeling results show that by increasing the number of arcs from 1 to 5 arcs, the maximum displacement created in the center of the door decreases by about 86%. Increasing the height of the arch from 5 to 10 and 20 cm, based on the number of different arches, the maximum displacement of the center of the door decreases between 5 and 32%. Among the different methods of strengthening the door, the use of multi-arch method increases the resistance. This method creates this resistance by consuming less steel and is more economical.

کلیدواژه‌ها [English]

Explosion Load
Explosion-Proof Door
Numerical Analysis
Multi-Arc Layer
Strengthening
Reinforcing

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