design of overhead rcc rectangular water tank
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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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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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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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WATER TANK
BASED ON
PLACEMENT OF
TANK
BASED ON SHAPE OF
TANK
1. RESTING ON GROUND
2. UNDER GROUND
3. ELEVATED
1. CIRCULAR
2. RECTANGULAR
3. SPHERICAL
4. INTZ
5. CONICAL BOTTOM
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RECTANGULAR 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 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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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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Specification Size Reinforcement details
Longer side wall
Long span
Short span
1. +ve bending moment
2. -ve bending moment
12m×4m
8mm Ø @300mm c/c
12mm Ø @90mm c/c
20mm Ø @110mm c/c
Shorter side wall
Long span
I. At top
II. At bottom
Short span
I. At supports
II. At middle
5m×4m
12mm Ø @170mm c/c
12mm Ø @80mm c/c
12mm Ø @70mm c/c
10mm Ø @80mm c/c13
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3)DESIGN OF BASE SLAB:-
Specification Size Reinforcement details
Base slab
Short span
I. -ve bending moment
II. +ve bending moment
Long span
I. -ve bending moment
II. +ve bending moment
5m×4m
16mm Ø @80mm c/c
16mm Ø @110mm c/c
16mm Ø @110mm c/c
10mm Ø @220mm c/c
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Specification Size Reinforcement details
Beam I
Main reinforcement
Stirrups
480mm×300mm
3 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 II
Main reinforcement
Stirrups
480mm×300mm
3 bars of 20mm Ø
8mm Ø @300mm c/c
Beam III
Main reinforcement
I. Span AB
II. Span BC
Stirrups
480mm×300mm
3 bars of 12mm Ø
2 bars of 12mm Ø
8mm Ø @300mm c/c 17
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5) DESIGN OF COLUMNS & BRACING BEAM
Specification Size Reinforcement details
Column
Main reinforcement
Ties
400mm×300mm
4 bars of 10mm Ø
8mm Ø @300mm c/c
Bracing beam
Main reinforcement
Stirrups
400mm×300mm
4 bars of16mm Ø both @ top and
bottom@300mm c/c
8mm Ø @300mm c/c
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1) 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 liters
4) 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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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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