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اصلاح رابطه شتاب معادل زلزلههای افقی و قائم در مخازن بیضوی روزمینی | ||
نشریه مهندسی عمران و محیط زیست دانشگاه تبریز | ||
مقاله 19، دوره 53.4، شماره 113، اسفند 1402، صفحه 216-231 اصل مقاله (853.65 K) | ||
نوع مقاله: یادداشت پژوهشی | ||
شناسه دیجیتال (DOI): 10.22034/ceej.2023.51437.2140 | ||
نویسندگان | ||
رضا لطفی؛ مسعود محمودآبادی* ؛ احسان دهقانی | ||
گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه قم | ||
چکیده | ||
در این تحقیق به موضوع شتاب معادل زلزله در مخازن بیضوی روزمینی پرداخته شده است. اساساً مخزن سازهای است که برای ذخیره انواع مایع به کار میرود و در انواع زمینی و هوایی و نیز بتنی و فولادی، کاربرد گستردهای در تصفیهخانهها، پالایشگاهها و کارخانهها دارد. با توجه به اعمال نیروهای دینامیکی و هیدرودینامیکی عظیم به یک مخزن بزرگ در هنگام زلزله و اهمیت زیاد تداوم عملکرد کامل سازه مذکور در شرایط بحرانی، مطالعه رفتار لرزهای آن از اهمیت بالایی برخوردار است. در بارگذاری لرزهای مخازن با استفاده از روابط نظریه هازنر (Housner)، پارامترهای شتاب معادل زلزله افقی و قائم مورد نیاز هستند لذا هدف تحقیق حاضر به دست آوردن روابطی با دقت مناسب برای پارامترهای مذکور در مخازن بیضوی میباشد. برای حصول به هدف مذکور، مخازن بیضوی مختلف با تکنیک اجزای محدود در نرمافزار آنسیس (ANSYS) مدلسازی و تحت زلزلههای گوناگون تحلیل دینامیکی گردیدهاند. سپس با استفاده از روش برازش آماری بر اساس نتایج روش اجزای محدود، روابطی غیرخطی برای پارامترهای مذکور به دست آمدهاند. از تحقیق حاضر نتیجه گردید که دقت میانگین روابط شتاب معادل زلزله افقی و قائم پیشنهادی این تحقیق، به ترتیب 16 درصد و 26 درصد از دقت میانگین رابطه شتاب معادل زلزله آییننامه طراحی نیروگاههای اتمی بالاتر میباشد. | ||
کلیدواژهها | ||
مخازن بیضوی؛ روابط هیدرودینامیک؛ نظریه هازنر؛ اجزای محدود؛ برازش آماری | ||
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مراجع | ||
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