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الحود هلل الخالق األكزم ، *"علَّن اإلًساى هالن يعلْن * الذى علَّن بالقلن "

والصالة والسالم علي رسول هللا، وعلي آله وصحبه، وهي وااله

Dr. Alaa Helba

عالء حلبــــــــــــة.د

A Guide to Designing Reinforced Concrete Water Tanks

Helba AlaaDr.

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Course introduction.

Different Types and Shapes of Water Tanks.

Precautions for Construction of water tanks.

Structural Elements of Water Tanks

Outline of Lecture 1

INTRODUCTION

• Water Tanks and liquid containing structures are Special structures .

• For their structural elements: Sections with tension at the liquid side should be designed as uncracked sections .

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Circular R.C. Tank Rectangular R.C. Tank

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Circular R.C. Tank (Cylindrical over Conical shape)

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Spherical R.C. Water Tank

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Rectangular Circular

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2- Ground tanks

Section Elevation

G . L D

Ground tanks

G . L D

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Ground tanks

Section Elevation

G . L D

3- Underground tanks

G . L

Section Elevation

G . L

Section Elevation

D L1 x L2

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Underground with central column support

Underground with Dome Roof

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Circular Rectangular Regular shape

D

L1

L2

L

D

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1- Water tightness Production of Water-tight Concrete

To get: Use

- high quality - Impermeable - Dense - crack-free - no honeycombing

concrete.

- well graded aggregates

- low w/c ratio - sufficient cement content - mechanical mixing - mechanical compaction (vibration) - curing of concrete.

2- Crack-free (or Uncracked) Sections No cracks at the liquid sides (design

uncracked sections) Satisfy the S.L.S requirements for

cracking width according to code 203/2007 clause 4-3-2.

Satisfy the strength requirement using U.S.L.S (calculate the required steel rft.)

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Roof slab

Wall

Floor slab

Top of foundation

Elevated tank

Components: Tower supp. Sys.

Structural Elements of Water Tanks Roof slab

Walls

Floor slab

Components of Elevated tank

Components:

Tower supp. Sys.

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ELEVATED WATER TANK

Roof Slab

Floor Slab

Cylindrical Wall

R.C. Shaft

Structural Elements of Water Tanks

Roof Slab

Floor Slab

Rectangular Walls

ELEVATED TANKS

ELEVATED TANK

Structural Elements of Water Tanks

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GROUND WATER TANK

Ground TANK

Structural Elements of Water Tanks

Structural Elements of R.C. Water Tanks

Components:

• Roof slab

• R.C. Walls

• Floor slab

• Tower supp. Sys.

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