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EARTHQUAKE EVALUATION OF THE NON STRUCTURAL ELEMENTS IN A THERMAL POWER PLANT F. Nateghi-A., A. Rezaie Tabrizi and M. Khazaei Poul Abstract Non Structural elements such as mechanical, electrical and architectural elements always posses serious damage potentials during earthquakes. Degree of damage imposed by the non structural elements is not usually measured by the physical damages caused, but more so by the amount of the economical and functional disruptions created in a built environment. This phenomenon is enhanced where the functional performance criteria used for the specific site should be of higher standards, meaning for example the “immediate use” criteria. In order to account for this sort of possible interruptions and plan for the worst case scenario during an earthquake in a thermal power plant in Iran, a study was carried out to evaluate the seismic vulnerability status of non structural components of the main control building in this power plant. Level one and two assessment methods, namely; rapid and detailed evaluations were used. Three main documents considered for this evaluation were the MCEER and FEMA-310 and FEMA-356 recommendations. The method used and the results obtained which are classified into four hazard levels namely; very high, high, intermediate and low are to be presented in this paper. Keywords Earthquake, Evaluation, Nonstructural, Power plant, Equipment چکیده اقلام غير سازه‌ای در تأسیسات و سازه‌های نقش بسيار حياتي را در عملكرد آن‌ها ايفا می‌نمایند. با توجه به حساسيت اين اقلام و عملكرد موردنظر آن‌ها در زمان زلزله بخصوص زلزله‌های متوسط و شديد نياز مبرم براي ارزيابي عملكرد هر يك از اين اجزا موردنیاز می‌باشد. در اين پروژه براي تأسیسات حرارتي از روش‌های FEMA جهت ارزيابي عملكرد لرزه‌ای اقلام غير سازه‌ای استفاده شد و بر اساس مطالعات به اين روش‌ها جداول عملكردي هر يك از اقلام موردمطالعه ارزيابي و ارائه شد. جداول شامل چهار گزينه آسیب‌پذیری خيلي بالا، بالا، متوسط و كم می‌باشد كه در تزارهاي مختلف زلزله براي هر يك از اقلام نشان داده‌شده است روش‌های پيشنهادي عمومیت داشته و در خصوص اقلام غير سازه‌ای متفاوت در سازه‌ها و نیروگاه‌های مختلفت قابليت اجرا دارد منبع دانلود 29-1-2.pdf

Modified Linear Approximation for Assessment of Rigid Block Dynamics Vahid Sharif This study proposes a new linear approximation for solving the dynamic response equations of a rocking rigid block. Linearization assumptions which have already been used by Hounser and other researchers cannot be valid for all rocking blocks with various slenderness ratios and dimensions; hence, developing new methods which can result in better approximation of governing equations while keeping simplicity is necessary. In this paper, a new linear approximation is derived for solving the deferential equations of a rocking block in order to include wider range of blocks with various slenderness. The proposed method is verified by numerical solutions of the governing equations utilizing two methods of: average acceleration and fourth order Runge-Kutta. Verifications revealed more reasonable accuracy of the proposed method in comparison with the current linearization assumptions منبع دانلود JSEG91313868600.pdf