دانلود مقاله THE EFFECT OF VERTICAL COMPONENT OF BASE EXCITATION ON NON-LINEAR DYNAMIC BEHAVIOR OF CONCRETE COOLING TOWERS
سال انتشار: ۱۳۸۶
محل انتشار: پنجمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله
تعداد صفحات: ۹
Saeid Sabouri – Associate Professor of Civil Engineering, K.N.T University of Technology, Tehran, Iran
Farhad Abedi Nik – Asst. Professor of Civil Engineering, SADRA Institute of Higher Education, Tehran, Iran
Ali Asghari – Asst. Professor of Civil Engineering, SADRA Institute of Higher Education, Tehran, Iran
design because they provide the load path for the self weight of the tower shell. For designing the concrete cooling towers, the horizontal component of earthquake acceleration is very important and usually the effect of vertical component of earthquake acceleration is ignored This paper presents the results of a finite element investigation of a representative “dry” cooling tower, using realistic horizontal and vertical acceleration data obtained from the recent and widely-reported Tabas, Naghan and Bam earthquakes in Iran. Three mentioned earthquakes applied to the structure, once with horizontal and vertical accelerations (HV state) and another without the presence of vertical acceleration (H state). The results of both analyses are reported in the paper, the locations of plastic hinges within the supporting columns are identified and the ramifications of the plastic hinges on the stability of the cooling tower are assessed. It is concluded that for the (typical) cooling tower configuration analyzed, the columns that are vital in providing a load path are influenced greatly by earthquake loading, and for the earthquakedata used in this study the representative cooling tower would be rendered unstable and would collapse under the earthquake forces considered. So the research shows that the presence of vertical component of earthquake acceleration changes the response of structure, but the effect of that, is not comparable with the significant effect of horizontal component of ground acceleration.