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بررسی رفتار لرزهای ساختمانهای دارای جداساز لرزهای پایه با در نظرگیری اندرکنش خاک و سازه تحت زلزلههای حوزه نزدیک و دور از گسل | ||
نشریه مهندسی عمران و محیط زیست دانشگاه تبریز | ||
مقاله 8، دوره 53.2، شماره 111، شهریور 1402، صفحه 84-95 اصل مقاله (983.95 K) | ||
نوع مقاله: مقاله کامل پژوهشی | ||
شناسه دیجیتال (DOI): 10.22034/jcee.2021.47601.2065 | ||
نویسندگان | ||
مریم رشیدی1؛ مجتبی فتحی* 2؛ افشین ناصرپور2 | ||
1دانشکده فنی و مهندسی، دانشگاه رازی، کرمانشاه | ||
2گروه عمران، دانشکده فنی و مهندسی، دانشگاه رازی، کرمانشاه | ||
چکیده | ||
مطالعه حاضر به تأثیر اندرکنش خاک و سازه بر روی رفتار لرزه ای قاب های جداسازی شده پایه تحت زلزله های حوزه نزدیک و دور پرداخته است. برای این منظور، نتایج تحلیل های دینامیکی غیرخطی قاب های یک، چهار و هشت طبقه جداسازی شده پایه، با قاب های متناظر پایه ثابت، مقایسه شدند. طبق نتایج میتوان گفت که شتاب طبقات در سازه های دارای جداساز پایه، به شدت کاهش می یابد و در برخی حالات به حدود 20 درصد حالت پایه ثابت و حتی کمتر نیز می رسد. ملحوظ کردن اثر اندرکنش خاک و سازه در قاب های یک و چهار طبقه دارای جداساز پایه، تأثیر چندانی روی تغییرمکان جانبی طبقات ندارد اما در قاب 8 طبقه روی بستر نرم تحت زلزله های حوزه نزدیک، تا حدود 80 درصد بیشتر است. همچنین نشان داده شد که برای قاب های دارای جداساز پایه، جذب انرژی در تیرها و ستون ها تا 100 درصد در مقایسه با قاب های بدون جداساز کاهش می یابد. در این حالت، در نظر گرفتن اثر اندرکنش خاک و سازه تأثیر چندان زیادی در نتایج جذب انرژی قاب های جداشده در پایه ندارد. درمجموع با توجه به نتایج شتاب و تغییرمکان طبقات میتوان گفت استفاده از جداساز لرزه ای پایه، برای قاب هشت طبقه مطلوب نیست. | ||
کلیدواژهها | ||
جداساز لرزه ای؛ اندرکنش خاک و سازه؛ خاک نرم؛ حوزه نزدیک؛ شتاب طبقات؛ تغییرمکان طبقات | ||
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مراجع | ||
استاندارد 2800، " آیین نامه طراحی ساختمانها در برابر زلزله"، ویرایش چهارم، وزارت راه و شهرسازی، 1393.
نشریه شماره 523، " راهنمای طراحی و اجرای سیستم های جداساز لرزه ای در ساختمانها"، معاونت برنامه ریزی و نظارت راهبردی، 1389.
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