بررسی اثرات توپوگرافی در ساختگاه سد پاکویما با روش اجزای مرزی سه‌بعدی در حوزه زمان

نوع مقاله : Articles

نویسندگان

1 دانشگاه تهران

2 دانشگاه تبریز

چکیده

توپوگرافی ناهموار یکی از عوامل ایجاد تفاوت جنبش در نقاط تکیه‌گاهی سازه‌های بزرگ نظیر سدها می‌باشد. در این مقاله از روش عددی اجزای مرزی سه‌بعدی جهت حل پاسخ لرزه‌ای دره محل سد پاکویما استفاده شده و نتایج حاصله در کنار تحلیل‌های ارائه شده، با مقادیر ثبت شده طی زمین‌لرزه سال 2001 سد پاکویما مقایسه شده است. از مؤلفه‌های افقی زمین‌لرزه واقعی ثبت شده در کف دره پس از پردازش‌های لازم، به‌عنوان موج ورودی جهت تحلیل استفاده گردیده و تاریخچه تغییر مکان و بزرگنمایی نقاط مختلف دره محل سد ارائه و بررسی شده است. نتایج نشانگر آن است که دامنه بیشینه تغییر مکان با افزایش ارتفاع نقاط در دو سوی دره کاهش می‌یابد؛ با این حال در حوزه فرکانس، بزرگنمایی در فرکانس‌های بالا با افزایش ارتفاع نقاط دره افزایش می‌یابد. نسبت دامنه تغییر مکان‌ها در طول دره محل سد تا حدود 3 نیز می‌رسد که این مسئله لزوم توجه به جنبش‌های غیریکنواخت در سازه‌های بزرگ را نشان می‌دهد.Topography Effects in Pacoima Dam Site Using Time-Domain Three-Dimensional BEMAbdollah Sohrabi-Bidar1*, Mohsen Isari2, Reza Tarinejad3 and Shahram Maghami41. Associate Professor, School of Geology, College of Science, University of Tehran, Tehran, Iran,*Corresponding Author, email: asohrabi@ut.ac.ir.2. Ph.D. Student, Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran3. Associate Professor, Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran4. Ph.D. Student, School of Geology, College of Science, University of Tehran, Tehran, IranKeywords: Topography Effects, Boundary Elements, Time-Domain, Numerical Modelling, Pacoima Dam.--English abstract is in the final page of the pdf file--

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