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اُلگوی بزرگ نمایی درّة گوسیشکل اُرتوتروپ | ||
نشریه مهندسی عمران و محیط زیست | ||
مقاله 1، دوره 54، شماره 117، اسفند 1403، صفحه 1-16 اصل مقاله (16.69 M) | ||
نوع مقاله: مقاله کامل پژوهشی | ||
شناسه دیجیتال (DOI): 10.22034/ceej.2024.59064.2296 | ||
نویسندگان | ||
سعید مجتبی زاده حسنلوئی1؛ مهدی پنجی* 1؛ محسن کمالیان2 | ||
1گروه مهندسی عمران، واحد زنجان، دانشگاه آزاد اسلامی | ||
2پژوهشکده مهندسی ژئوتکنیک، پژوهشگاه بینالمللی زلزلهشناسی و مهندسی زلزله، تهران | ||
چکیده | ||
در این مقاله، پاسخ لرزهای سطح درّه گوسیشکل (Gaussian-Shaped) اُرتوتروپ (Orthotropic) در برابر امواج مهاجم SH ارائه شده است. روش اجزای مرزی نیمفضای در حوزه زمان که پیشتر توسط مؤلفان پیشنهاد شده برای تحلیل مسأله مزبور به کار گرفته شده است. میرایی مصالح به صورت غیرمستقیم و به کمک توابع لگاریتمی در فرمولبندی اعمال شده است. ضمن صحّتسنجی نتایج در قالب یک رویکرد همگراسنجی برای یک درّه دایرهای، با فرض برخی پارامترهای کلیدی مدل تهیّه شده از قبیل عامل ایزوتروپی، نسبتشکل درّه و محتوای فرکانسی، اُلگوی بزرگنمایی لرزهای سطح زمین حساسیّتسنجی شده است. پاسخهای حاصل عمدتاً به صورت گرافهای دو/ سه بعدی در حوزه زمان و فرکانس قابل مشاهده میباشد. نتایج نشان داد بافت مصالح درّه و جهتگیری چینش نهشتههای زمین در تغییر اُلگوی لرزهای سطح زمین بسیار مؤثر است و حداکثر بزرگنمایی درّه در پریودهای کمتر از 5/0 برای عامل ایزوتروپی بیشینه مفروض، به میزان 14/2 به وقوع پیوست. | ||
کلیدواژهها | ||
پروژه داسبم؛ روش اجزای مرزی؛ نیمفضای اُرتوتروپ؛ حوزه زمان؛ درّه گوسیشکل؛ عامل ایزوتروپی؛ موج SH میرا شده | ||
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مراجع | ||
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