DESIGN & ANALYSIS OF OVERHEAD RCC RECTANGULAR WATER TANK

PRESENTED BY:-

A.ABDUL FATAH HAMID

A.S.KARTHIK

S.MUJEEB BASHA

SHOAIB BASHIR WANI

GUIDED BY:- Mr. D.Manohar

Assistant Professor CE

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INTRODUCTION

Storage tanks are built for storing water, liquid petroleum, petroleum products and similar liquids.

Code of practice for plain and reinforced concrete IS 456-2000.

Code of Practice for the storage of Liquids- IS3370 (Part I to IV).

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NEED FOR STUDY:

1. To make a study about the analysis and design of water tanks.

2. To make a study about the guidelines for the design of liquid retaining structure according to IS Code.

3. To know about the design philosophy for the safe and economical design of water tank.

4. In the end, the programs are validated with the results of manual design calculation.

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TYPES OF WATER TANKSWATER TANK

BASED ON PLACEMENT OF TANK

BASED ON SHAPE OF TANK

1. RESTING ON GROUND2. UNDER GROUND3. ELEVATED

1. CIRCULAR2. RECTANGULAR3. SPHERICAL4. INTZ5. CONICAL BOTTOM

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COMPARISON OF TANKSRECTANGULAR TANK

CIRCULAR TANK

INTZE TANK PRESTRESSED TANKS

For smaller capacities we go for rectangular tanks

For bigger capacities we go for circular tanks

Intze tank is constructed to reduce the project cost because lower dome in this construction resists horizontal thrust

For bigger tanks,prestressing is the superior choice resulting in a saving of up to 20%.

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RECTANGULAR WATER TANK INTRODUCTION

Rectangular tanks are used when the storage capacity is small.

Rectangular tanks should be preferably square in plan from point of view of economy.

It is also desirable that longer side should not be greater than twice the smaller side.

Moments are caused in two directions of the wall i.e., both in horizontal as well as in vertical direction.

Exact analysis is difficult and are designed by approximate methods.

When the length of the wall is more in comparison to its height, the moments will be mainly in the vertical direction, i.e., the panel bends as vertical cantilever

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AUTO CAD DESIGN

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DESIGN PROBLEM

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TO DESIGN A TANK (12M*5M*4M). THE BOTTOM OF TANK IS 12M ABOVE THE GROUND LEVEL. THE TANK IS COVERED AT TOP.SBC OF SOIL=150KN/M2.USE M20 MIX?

1)DESIGN OF ROOF SLAB:-

Reinforcement of slab

Specification Size Reinforcement details

Top slab

Long span Short span

12m×5m

8mm Ø @300mm c/c12mm Ø @1500mm c/c

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TOP SLAB REINFORCEMENT

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2) DESIGN OF LONGER & SHORTER SIDE WALLSSpecification Size Reinforcement details

Longer side wall

Long span

Short span1. +ve bending moment2. -ve bending moment

12m×4m

8mm Ø @300mm c/c

12mm Ø @90mm c/c20mm Ø @110mm c/c

Shorter side wall

Long spanI. At top II. At bottom

Short spanI. At supports II. At middle

5m×4m

12mm Ø @170mm c/c12mm Ø @80mm c/c

12mm Ø @70mm c/c10mm Ø @80mm c/c

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REINFORCEMT IN LONG & SHORT WALLS

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3)DESIGN OF BASE SLAB:-

Specification Size Reinforcement details

Base slab Short spanI. -ve bending momentII. +ve bending moment

Long spanI. -ve bending momentII. +ve bending moment

5m×4m

16mm Ø @80mm c/c16mm Ø @110mm c/c

16mm Ø @110mm c/c10mm Ø @220mm c/c

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REINFORCEMENT IN BASE SLAB

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4)DESIGN OF BEAMS

Specification Size Reinforcement details

Beam I Main reinforcement

Stirrups

480mm×300mm3 bars of 20mm Ø & 3 bars of 32 mm Ø

12mm Ø @50mm c/c ( near support)12mm Ø @80mm c/c ( near middle)

Beam IIMain reinforcement

Stirrups

480mm×300mm

3 bars of 20mm Ø8mm Ø @300mm c/c

Beam IIIMain reinforcementI. Span ABII. Span BC

Stirrups

480mm×300mm

3 bars of 12mm Ø2 bars of 12mm Ø

8mm Ø @300mm c/c

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BEAM REINFORCEMENT DETAILSBEAM1

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BEAM 2

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BEAM 3

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5) DESIGN OF COLUMNS & BRACING BEAMSpecification Size Reinforcement details

Column Main reinforcement

Ties

400mm×300mm4 bars of 10mm Ø

8mm Ø @300mm c/c

Bracing beam Main reinforcement

Stirrups

400mm×300mm4 bars of16mm Ø both @ top and bottom@300mm c/c

8mm Ø @300mm c/c

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DESIGN OF COLUMNS & BRACING BEAM

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DESIGN OF FOUNDATION

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WATER TANK DESIGN &ANALYSIS USING STAAD PRO

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CONCLUSION1) Storage of water in tanks has become a necessity for

drinking and washing purposes in the present day life.2) For small capacities we go for rectangular water tanks

& for large capacities we go for circular tanks.3) The designed RCC rectangular tank can store water

upto 240000 liters4) In this design project we have analyzed the over head

rectangular RCC water tank, through theoretical design and STAAD Pro program.

5) Although the stresses and bending moment are nearly equal but all the parameters used in the theoretical design cannot be fully adopted in the program design.

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REFRENCES Gurcharan Singh,˝Theory & Design of RCC Structures” Design of RCC Structures By B C Punimia Dr.A K Goel & Dr I C Syal,˝Reinforced Concrete Structures” Raju N Krishna,˝Reinforced Concrete Design” IS 456-2000 Indian Standard Code of Practice for Reinforced

Concrete IS 3370 Part I,II,III,IV -1965 Indian Standard Code of Practice for

Liquid Retaining Structures A.K Jain Reinforced Concrete (Part II) Design Of Reinforced Concrete Structures By V.N.Vazi Rani

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