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۱AN INVESTIGATION ABOUT EFFECTS OF SUPPORTING SYSTEMS ON FLUID–ELEVATED TANKS INTERACTION
نویسنده(ها): ،
اطلاعات انتشار: پنجمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله، سال
تعداد صفحات: ۷
As known from very upsetting experiences, elevated tanks were collapsed or heavily damaged during the earthquakes all over the word. These unusual events showed that the supporting system of the elevated tanks has more critical importance than the other structural types of tanks. So most of damages observed during the earthquakes arise from the causes like unsuitable design of supporting system, mistakes on
selecting of supporting system and\or underestimated demand or overestimated strength etc. Moreover it can be seen from the literature that fluid–structure interaction can play an important role on seismic behavior of elevated tanks. Consequently in this study the aim is selected as the changing supporting system of elevated tanks to what extent may be effective. As examples two different types of supporting system are selected for this subject. The first is frame and the second is cylindrical shell supporting system. After that seismic analyses were performed considering fluid–structure interaction. Conclusions from the analyses result showed that supporting system may considerably change the seismic behavior of the elevated tanks.<\div>

۲COMPARISON OF STRUCTURAL RESPONSE OF TRADITIONAL AND STRENGHTENED REINFORCED CONCRETE MINARETS
نویسنده(ها): ، ، ،
اطلاعات انتشار: پنجمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله، سال
تعداد صفحات: ۸
Numerous destructive earthquakes occurred in Turkey in recent years. Many minarets were damaged or collapsed during these catastrophic events resulting in loss of life in some cases. Minarets are generally constructed without a detailed lateral analysis or construction permit. Furthermore, there is no official guideline or code governing the design of these special slender structures. As a result, the level of seismic damage sustained by the minarets is usually associated with the selected structural configuration, construction quality and experience of construction workers. The main objective of this study is to compare two structural systems used for reinforced concrete minarets subjected to earthquake loads. One of the structural systems is very common and includes cylin drical minaret body. The other, a relatively recent one, has buttressed or propped up polygonal body. The minarets are modeled using the finite element method with design spectra and acceleration histories recorded during the August 17, 1999 Kocaeli and 12 November 1999 Düzce, Turkey earthquakes. The calculated displacement response and local stress concentrations for the two minarets are briefly discussed and illustrated.<\div>
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