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ارزیابی پارامترهای ژئومکانیکی و هندسی مؤثر بر حریم گسل: تحلیل حساسیت موریس و یادگیری ماشین | ||
| نشریه مهندسی عمران و محیط زیست | ||
| دوره 56، شماره 122، خرداد 1405، صفحه 117-132 اصل مقاله (6.62 M) | ||
| نوع مقاله: مقاله کامل پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22034/ceej.2026.68453.2448 | ||
| نویسندگان | ||
| مرتضی عزتی فسقندیس؛ احمدرضا محبوبی اردکانی* | ||
| دانشکده مهندسی عمران، آب و محیط زیست، شهید بهشتی تهران | ||
| چکیده | ||
| زلزله نتیجه مستقیم جابجایی وگسیختگی گسل و انتشار گسیختگی در سطح زمین است. بسیاری از زلزلههای مخرب در امتداد گسلهای فعال رخ میدهد. از این رو، مطالعه و ارزیابی حریم گسل، اقدامی حیاتی برای کاهش بلایای طبیعی مرتبط با زلزله به شمار میرود. با توجه به اینکه در دستورالعملهای آییننامهای و ادبیات فنی، به اهمیت و تأثیر همزمان پارامترهای مؤثر بر حریم گسل، همچنین به مشخصات خاک و گسل توجه کافی نشده است، در این پژوهش سعی شده تا اهمیت و رابطه پارامترهای هندسی و ژئومکانیکی مؤثر بر حریم گسل را در هر دو بخش فرادیواره و فرودیواره، به صورت کیفی ارزیابی شود. برای ارزیابی اهمیت این پارامترها، از تحلیل حساسیت جامع موریس و الگوریتم جنگل تصادفی استفاده شد. نتایج حاصل از این تحلیل نشان میدهد که ارتفاع لایه خاک بیشترین اهمیت و تأثیر را بر جابهجاییهای ناشی از حرکت گسل دارد که این تأثیر در گسل معکوس بیشتر از گسل نرمال است. همچنین، در میان پارامترهای ژئومکانیکی، پارامترهای الاستیک خاک در مقایسه با پارامترهای پلاستیک خاک در حریم گسل از اهمیت بیشتری برخوردارند. شناسایی پارامترهای کم اهمیتتر، به کاهش هزینه محاسبات عددی در مطالعات آتی کمک شایانی خواهد کرد. همچنین، نتایج این پژوهش راه را برای بررسی کمی اهمیت و اندرکنش پارامترهای با اهمیت بالا در مطالعات آینده حریم گسل هموار میکند. نتایج این مطالعه کمک میکند تا دستورالعملهای آییننامهای دقیقتری برای حفظ ایمنی زیرساختها توسعه یابد. | ||
| کلیدواژهها | ||
| تحلیل حساسیت؛ حریم گسل؛ پارامترهای هندسی و ژئومکانیکی؛ گسلش نرمال؛ گسلش معکوس | ||
| مراجع | ||
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