Example desing seismic water tanks

1
‫واألوربي‬ ‫المصري‬ ‫الكود‬ ‫وفق‬ ‫محلولة‬ ‫امثلة‬
‫واألرضية‬ ‫العالية‬ ‫الخزانات‬ ‫تصيم‬ ‫نماذج‬
‫والمكشوفة‬ ‫المسقوفة‬-‫معدنية‬ ‫او‬ ‫الخرسانة‬ ‫مادة‬
1-‫اطار‬ ‫على‬ ‫محمول‬ ‫مسقوف‬ ‫مسلحة‬ ‫خرسانة‬ ‫عالي‬ ‫خزان‬(4)‫اعمدة‬
2--‫اطار‬ ‫على‬ ‫محمول‬ ‫مسقوف‬ ‫مسلحة‬ ‫خرسانة‬ ‫عالي‬ ‫خزان‬(6)‫اعمدة‬
3-‫على‬ ‫محمول‬ ‫مسقوف‬ ‫مسلحة‬ ‫خرسانة‬ ‫عالي‬ ‫خزان‬‫مسلحة‬ ‫خرسانة‬ ‫كور‬
4–‫خزان‬‫ارضي‬‫دائري‬ ‫معدني‬‫مسقوف‬‫مباشرة‬ ‫مسنود‬‫التربة‬ ‫على‬
5–‫مسلحة‬ ‫خرسانة‬ ‫مكشوف‬ ‫ارضي‬ ‫خزان‬‫دائري‬‫مباشرة‬ ‫مسنود‬‫التربة‬ ‫على‬
6-–‫مسلحة‬ ‫خرسانة‬ ‫مكشوف‬ ‫ارضي‬ ‫خزان‬‫مستطيل‬‫مباشرة‬ ‫مسنود‬‫التربة‬ ‫على‬

2
‫مقدمة‬
-‫قليلة‬ ‫بقدرة‬ ‫تمتاز‬ ‫والسوائل‬ ‫المياه‬ ‫خزانات‬ ‫ان‬ ‫المعروف‬ ‫من‬
‫استيعاب‬ ‫في‬‫وممطولية‬ ‫مطاوعة‬ ‫واقل‬ ‫الزلزال‬ ‫طاقة‬ ‫وتشتيت‬
‫بالمقارنة‬‫الزالزل‬ ‫كودات‬ ‫في‬ ‫جاء‬ ‫لما‬ ‫طبقا‬ ‫التقليدية‬ ‫األبنية‬ ‫مع‬
‫األبنية‬ ‫حول‬‫وفرضيات‬ ‫ثوابت‬ ‫حيث‬ ‫والسوائل‬ ‫المياه‬ ‫وخزانات‬
‫الزلزالي‬ ‫التصميم‬‫اكبر‬ ‫قاعدي‬ ‫قص‬ ‫قوى‬ ‫تعطى‬ ‫الخزانات‬ ‫في‬
‫األبنية‬ ‫من‬ ‫مرات‬ ‫بسبع‬ ‫تقريبا‬
-‫السالمة‬‫الزلزالية‬‫كبيرة‬ ‫اهمية‬ ‫ذات‬‫لصهاريج‬‫مياه‬ ‫تخزين‬
‫و‬ ‫الشرب‬‫السوائل‬
-‫المياه‬ ‫خزانات‬ ‫تبقى‬ ‫أن‬ ‫يجب‬‫تودي‬‫وظيف‬‫تها‬‫في‬‫فترة‬‫ال‬‫زلزال‬
‫و‬‫إمدادات‬ ‫ضمان‬‫المتضررة‬ ‫المناطق‬ ‫إلى‬ ‫للشرب‬ ‫الصالحة‬ ‫المياه‬
‫وتلبي‬ ‫الزلزال‬ ‫من‬‫الحاجة‬ ‫ة‬‫الحرائق‬ ‫لمكافحة‬.‫الس‬ ‫يحتوي‬ ‫قد‬‫ائل‬
‫ال‬ ‫في‬‫خزان‬‫ات‬‫سوائل‬‫وهذه‬ ‫لالشتعال‬ ‫والقابلة‬ ‫سامة‬‫الخزانات‬‫يجب‬
‫محتوياتها‬ ‫تفقد‬ ‫ال‬ ‫أن‬‫الزلزال‬ ‫أثناء‬.
-‫الس‬ ‫خزانات‬‫و‬‫هي‬ ‫ائل‬‫نوع‬ ‫من‬ ‫أساسا‬:
-‫األرض‬‫ي‬–‫األرض‬ ‫عن‬ ‫والمرتفع‬-‫والعالية‬
-‫أ‬ ‫تستخدم‬ ‫هي‬‫ساس‬‫ا‬‫العالية‬ ‫األبنية‬ ‫في‬ ‫الشرب‬ ‫مياه‬ ‫كخزانات‬
-‫او‬ ‫اعمدة‬ ‫على‬ ‫محمولة‬ ‫اما‬ ‫وتكون‬‫اسطواني‬ ‫كور‬
‫من‬‫مسنودة‬ ‫او‬ ‫خرسانة‬ ‫جدران‬‫التربة‬ ‫األرض‬ ‫على‬ ‫مباشرة‬
-‫الخرسانة‬ ‫مواد‬ ‫من‬ ‫واشادتها‬ ‫تصميمها‬ ‫ويمكن‬‫المسلحة‬
‫فوالذية‬ ‫معدنية‬ ‫عناصر‬ ‫او‬

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Design elevated tanks Dynamic Analysis
Response spectrum Spring mass model
Examples solved according to
Egyptian - European -Code
Models High tanks – floor-design
Roofed - exposed - concrete - metal
1. High-tank reinforced concrete roofed propped on a framework (4) columns
2. - High-roofed reinforced concrete tank propped on a framework (6) columns
3 - High-roofed reinforced concrete tank propped on Core Reinforced Concrete
4 - Ground-roofed metal circular tank propped directly on the soil
5 - Ground tank Exposed reinforced concrete circular propped directly on the soil
6. - Ground tank Exposed reinforced concrete rectangular propped directly on the soil

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. INTRODUCTION
-It is well recognized that liquid storage tanks possess low ductility and energy
Absorbing capacity as compared to the conventional buildings. Accordingly, various
Design codes provide higher level of design seismic forces for tanks. In this article,
Provisions of IBC 2000, ACI, AWWA, API, Euro code 8 and NZSEE guidelines are
Reviewed to assess the severity of design seismic forces for tanks vis-à-vis those
Buildings It is seen that, depending on the type of tank, design seismic force for tanks
Seismic safety of liquid storage tanks is of considerable importance.
Water storage tanks should remain functional in the post earthquake period to
ensure potable water supply to earthquake-affected regions and to cater the
need for fire fighting. Industrial liquid containing tanks may contain highly
toxic and inflammable liquids and these tanks should not loose their contents
during the earthquake. Liquid storage tanks are mainly of two types: ground
supported tanks and elevated tanks. Elevated tanks are mainly used for water
supply schemes and they could be supported on RCC shaft, RCC or steel
frame, or masonry pedestal
Dr. Hamida

Example desing seismic water tanks

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Example desing seismic water tanks