الگوی بزرگنمایی لرزه ای سطح زمین در حضور تونل زیرزمینی نعل اسبی تحت امواج مهاجم SH

نوع مقاله : Articles

نویسندگان

دانشگاه آزاد اسلامی واحد زنجان، زنجان، ایران

چکیده

در این مقاله، الگوی بزرگنمایی پاسخ لرزه‌ای سطح زمین همگن و همسان در حضور تونل‌های زیرزمینی نعل‌اسبی شکل بدون پوشش تحت امواج مهاجم مایل SH ارائه شده است. از روش عددی اجزای مرزی نیم صفحه1 در حوزه ی زمان که قادر است مش بندی را تنها بر روی مرز پیرامون حفره متمرکز سازد، برای مدلسازی و تحلیل لرزه ای بهره گرفته شده است. از مشخصات هندسی تونل خط دوم متروی کرج برای مطالعات پارامتریک استفاده شده است. موج مهاجم از نوع موجک ریکر2 با مشخصات مفروض در نظرگرفته شده است. نسبت عمق تونل، موقعیت افقی آن و زاویه ی موج مهاجم از جمله پارامترهایی هستند که مورد حساسیت‌سنجی قرار گرفته اند. از مقایسه‌ی نتایج حاصل با دستاوردهای تحلیلی دیگر محققان، دقت مطلوب روش پیشنهاد شده در مدلسازی تونل‌های نعل‌اسبی مبین شد. همچنین مشاهده شد که حضور تونل‌های زیرزمینی در عمق ها و موقعیت های مختلف بر روی شکل‌گیری الگوی متفاوت پاسخ لرزه‌ای سطح زمین مؤثر است. استفاده از روش اجزای مرزی نیم‌صفحه در حوزه‌ی زمان برای مدل سازی سازه های زیرزمینی، جایگزین با دیگر روش‌های عددی پیشین و بهره گیری از نتایج حاصل جهت تکمیل و تدقیق آیین‌نامه‌های لرزه ای موجود توصیه می شود.

کلیدواژه‌ها

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  • تاریخ دریافت: 28 مهر 1395
  • تاریخ بازنگری: 06 اسفند 1399
  • تاریخ پذیرش: 06 دی 1399

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