کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
266413 504359 2015 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Seismic response factors of reinforced concrete pedestal in elevated water tanks
ترجمه فارسی عنوان
عوامل پاسخ لرزه ای پایه های بتن مسلح در مخازن آب بالا
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی


• The tank size affects seismic response behavior of RC pedestals in elevated tanks.
• RC pedestals with h/dw above 2 demonstrated flexure–shear cracking pattern.
• RC pedestals with h/dw of below 2 demonstrated web-shear cracking pattern.
• As tank size increases, overstrength factor decreases and ductility factor increases.
• For seismic design it is suggested to categorize elevated tanks based on tank size.

Reinforced concrete (RC) elevated water tanks are critical structures that are expected to remain functional after severe earthquakes in order to serve the water system networks. Despite this significant role, the number of research studies which investigated the nonlinear seismic response of RC pedestals in elevated water tanks is very limited. In the current codes and standards, the seismic response factors are mainly based on engineering judgement. In this paper, a systematic approach is employed to establish the seismic response factors for a wide range of elevate water tank sizes and RC pedestal dimensions commonly built in industry. In total, forty-eight model configurations (prototypes) are selected and designed based on current codes and standards. The finite element (FE) method is then used for nonlinear static (pushover) analysis of the prototypes. The pushover curve of each prototype is developed and the seismic response factors are determined accordingly. The effect of various parameters such as fundamental period, height to diameter ratio, seismic design category, and tank size on the seismic response factors of elevated water tanks is evaluated. Furthermore, the cracking propagation pattern in RC pedestal is studied. The result of the study shows that the tank size is a critical parameter affecting the seismic response of elevated water tanks. It is recommended not to use the same seismic response factors for all RC elevated water tanks regardless of the tank size. In addition, two different patterns of cracking depending on the height to diameter ratio of the pedestal are detected and discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 87, 15 March 2015, Pages 32–46
نویسندگان
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