زمین شناسی مهندسی

زمین شناسی مهندسی

یک راه حل تحلیلی برای برآورد اثر اندرکنش خاک و سازه روی فرکانس ارتعاش آزاد دیوارهای حائل خاک مسلح

نویسندگان
چکیده
یکی از پارامترهای تأثیرگزار بر رفتار دینامیکی دیوارهای خاک مسلح فرکانس اساسی سیستم است. در این مقاله با استفاده از تئوری صفحه‌ها و مباحث انرژی، روابطی تحلیلی برای سه مود اول ارتعاش دیوارهای خاک مسلح ژئوسنتتیکی ارائه شده است. هم‌چنین اندرکنش بین دیوار و خاک مسلح به‌وسیله یک سری فنرهای محوری مدنظر قرار گرفته است. هم‌چنین مودهای ارتعاش داخل صفحه که در مدل‌سازی دوبعدی قابل بررسی نبود، در این مقاله به‌وسیله تئوری صفحه‌ها مدنظر قرار گرفته است. برای اولین بار در یک تحلیل سه‌بعدی برای هرچه به واقعیت نزدیک‌تر شدن مدل‌سازی، رفتار متفاوت خاک و مسلح کننده‌ها در فشار و کشش نیز مدنظر قرار گرفته است. تأثیر پارامترهای مختلفی از جمله نسبت سختی خاک به مسلح کننده‌ها، نسبت سختی مسلح‌کننده به دیوار، طول مسلح کننده‌ها، نسبت عرض و طول مسلح کننده به ارتفاع دیوار در روابط ارائه شده بررسی شده است. در نهایت نتایج به‌دست آمده از روابط تحلیلی ارائه شده در این تحقیق با نتایج حاصل از مدل‌سازی المان محدود به‌وسیلۀ نرم‌افزار آباکوس و هم‌چنین نتایج دیگر محققان مقایسه شده است، که نشان از دقت زیاد روابط ارائه شده دارد. روش ارائه شده آغازی بر ارائه روابط تحلیلی سه‌بعدی برای دیوارهای خاک مسلح است.
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