Civil engineering

Spherical Dome

Type-1 [u.d.l only]

Radius of Dome (R):
Rise of Dome (h):
Base diameter (D):
Thickness of Dome (t): mm
Permissible stress in steel: N/mn²
Concrete:
Steel:

Loads:

Create new Load

Base radius: m
θ(theta): deg
Total load: KN/m²

Forces

Meridonial Thrust: KN/m
Meridonial Stress: N/mm²
Hoop force: KN
Hoop stress: N/mm²

NOTE: Since stress are very small, provide nominal reinforcement.

Area of steel reinforcement: mm²

Provide mm diameter @ mm C/C in both meridionally and circumferentially. Near crown, provide as a mesh to avoid congestion.

Design of Ring beam

Horizontal component of meridonial thrust / m length of beam: KN
Total hoop tension acting / m length of ring beam: KN
Area of steel reinforcement in ring beam: mm²

Provide no of bars , mm diameter of bars.

Safe.! It is a safe build..

Not safe Change no of bars or diameter of bars..

Size of ring beam:

Modular ratio:
Maximum tensile stress in the equalant concrete area: N/mm²
Width of ring beam: mm
Depth of ring beam: mm

provide mm * mm size of ring beam.

Provide minimum shear steel , ie 2 legged, 6mm diameter stirrups.

Spherical Dome

Type-2 [Concentrated load at crown only]

Radius of Dome (R):
Rise of Dome (h):
Base diameter (D):
Thickness of Dome (t): mm
Permissible stress in steel: N/mn²
Concrete:
Steel:

Loads:

Create new Load

Base radius: m
θ(theta): deg
Total load: KN

Forces

Meridonial Thrust: KN/m

Compressive

Meridonial Stress: N/mm²
Hoop force: KN

Tensile

Hoop stress: N/mm²

NOTE: Since stress are very small, provide nominal reinforcement.

Area of steel reinforcement: mm²

Provide mm diameter @ mm C/C in both meridionally and circumferentially. Near crown, provide as a mesh to avoid congestion.

Design of Ring beam

Horizontal component of meridonial thrust / m length of beam: KN
Total hoop tension acting / m length of ring beam: KN
Area of steel reinforcement in ring beam: mm²

Provide no of bars , mm diameter of bars.

Safe.! It is a safe build..

Not safe Change no of bars or diameter of bars..

Size of ring beam:

Modular ratio:
Maximum tensile stress in the equalant concrete area: N/mm²
Width of ring beam: mm
Depth of ring beam: mm

provide mm * mm size of ring beam.

Provide minimum shear steel , ie 2 legged, 6mm diameter stirrups.

Spherical Dome

Type-3 [u.d.l and point load are acting togather]

Radius of Dome (R):
Rise of Dome (h):
Base diameter (D):
Thickness of Dome (t): mm
Permissible stress in steel: N/mn²
Concrete:
Steel:

Loads:

Create new udl

Create new point load

Base radius: m
θ(theta): deg
Total udl: KN/m²
Total point load: KN

Forces

Meridonial Thrust: KN/m

Compressive

Meridonial Stress: N/mm²
Hoop force: KN

Tensile

Hoop stress: N/mm²

NOTE: Since stress are very small, provide nominal reinforcement.

Area of steel reinforcement: mm²

Provide mm diameter @ mm C/C in both meridionally and circumferentially. Near crown, provide as a mesh to avoid congestion.

Design of Ring beam

Horizontal component of meridonial thrust / m length of beam: KN
Total hoop tension acting / m length of ring beam: KN
Area of steel reinforcement in ring beam: mm²

Provide no of bars , mm diameter of bars.

Safe.! It is a safe build..

Not safe Change no of bars or diameter of bars..

Size of ring beam:

Modular ratio:
Maximum tensile stress in the equalant concrete area: N/mm²
Width of ring beam: mm
Depth of ring beam: mm

provide mm * mm size of ring beam.

Provide minimum shear steel , ie 2 legged, 6mm diameter stirrups.

Conical Dome

Type-1 [u.d.l only]

Rise of Dome (h):
Base diameter (D):
Thickness of Dome (t): mm
Permissible stress in steel: N/mn²
Concrete:
Steel:

Loads:

Create new Load

Base radius: m
θ(theta): deg
Total load: KN/m²

Forces

Meridonial Thrust: KN/m
Meridonial Stress: N/mm²
Hoop force: KN
Hoop stress: N/mm²

NOTE: Since stress are very small, provide nominal reinforcement.

Area of steel reinforcement: mm²

Provide mm diameter @ mm C/C in both meridionally and circumferentially. Near crown, provide as a mesh to avoid congestion.

Design of Ring beam

Horizontal component of meridonial thrust / m length of beam: KN
Total hoop tension acting / m length of ring beam: KN
Area of steel reinforcement in ring beam: mm²

Provide no of bars , mm diameter of bars.

Safe.! It is a safe build..

Not safe Change no of bars or diameter of bars..

Size of ring beam:

Modular ratio:
Maximum tensile stress in the equalant concrete area: N/mm²
Width of ring beam: mm
Depth of ring beam: mm

provide mm * mm size of ring beam.

Provide minimum shear steel , ie 2 legged, 6mm diameter stirrups.

Conical Dome

Type-2 [Concentrated load at crown only]

Rise of Dome (h):
Base diameter (D):
Thickness of Dome (t): mm
Permissible stress in steel: N/mn²
Concrete:
Steel:

Loads:

Create new Load

Base radius: m
θ(theta): deg
Total load: KN

Forces

Meridonial Thrust: KN/m

Compressive

Meridonial Stress: N/mm²
Hoop force: KN

Tensile

Hoop stress: N/mm²

NOTE: Since stress are very small, provide nominal reinforcement.

Area of steel reinforcement: mm²

Provide mm diameter @ mm C/C in both meridionally and circumferentially. Near crown, provide as a mesh to avoid congestion.

Design of Ring beam

Horizontal component of meridonial thrust / m length of beam: KN
Total hoop tension acting / m length of ring beam: KN
Area of steel reinforcement in ring beam: mm²

Provide no of bars , mm diameter of bars.

Safe.! It is a safe build..

Not safe Change no of bars or diameter of bars..

Size of ring beam:

Modular ratio:
Maximum tensile stress in the equalant concrete area: N/mm²
Width of ring beam: mm
Depth of ring beam: mm

provide mm * mm size of ring beam.

Provide minimum shear steel , ie 2 legged, 6mm diameter stirrups.

Conical Dome

Type-3 [u.d.l and point load are acting togather]

Rise of Dome (h):
Base diameter (D):
Thickness of Dome (t): mm
Permissible stress in steel: N/mn²
Concrete:
Steel:

Loads:

Create new udl

Create new point load

Base radius: m
θ(theta): deg
Total udl: KN/m²
Total point load: KN

Forces

Meridonial Thrust: KN/m

Compressive

Meridonial Stress: N/mm²
Hoop force: KN

Tensile

Hoop stress: N/mm²

NOTE: Since stress are very small, provide nominal reinforcement.

Area of steel reinforcement: mm²

Provide mm diameter @ mm C/C in both meridionally and circumferentially. Near crown, provide as a mesh to avoid congestion.

Design of Ring beam

Horizontal component of meridonial thrust / m length of beam: KN
Total hoop tension acting / m length of ring beam: KN
Area of steel reinforcement in ring beam: mm²

Provide no of bars , mm diameter of bars.

Safe.! It is a safe build..

Not safe Change no of bars or diameter of bars..

Size of ring beam:

Modular ratio:
Maximum tensile stress in the equalant concrete area: N/mm²
Width of ring beam: mm
Depth of ring beam: mm

provide mm * mm size of ring beam.

Provide minimum shear steel , ie 2 legged, 6mm diameter stirrups.

Flexible base

- Circular tank -

Capacity of tank: litres
Depth of water: metre
Free board: metre
Density of water: KN/m³
Direct tensile stress in concrete: N/mm²
Tensile stress in steel N/mm²
Grade of concrete:
Grade of steel:

Characteristic strength of concrete: N/mm²
Characteristic strength of steel: N/mm²
Modular ratio: N/mm²
Diameter of tank: m
Maximum hoop tension: KN
Area of main steel reinforcement: mm² / m height

Using mm diameter bars, Spacing = mm

Provide mm diameter bars at mm c/c.

Thickness of tank wall: mm
Overall height of tank: m

Reinforcement in tank wall

Spacing of hoops increased towards top.
Minimum area of steel: mm²

Using mm diameter bars, Spacing = mm

Provide mm diameter hoops at mm c/c at top 1.5m depth.

Distribution and temperature reinforcement in vertical direction.

Area of steel: mm²

Using mm diameter bars, Spacing = mm

Provide mm diameter bars at mm c/c vertically.

Design of tank floor slab.

Provide floor slab thickness: mm
Minimum area of steel: mm² in both direction.
Provide half reinforcement in each face: mm²

Using mm diameter bars, Spacing = mm

Provide mm diameter bars at mm c/c in both direction and in each face.

Fixed base

- Circular tank -

Capacity of tank: litres
Depth of water: metre
Free board: metre
Density of water: KN/m³
Direct tensile stress in concrete: N/mm²
Tensile stress in steel N/mm²
Grade of concrete:
Grade of steel:

Characteristic strength of concrete: N/mm²
Characteristic strength of steel: N/mm²
Modular ratio: N/mm²
Diameter of tank: m
Overall height of tank: m
Assumed thickness of walls and base slab: mm

Bending moment, ring tension and shear:

Maximum bending moment: KNm/m at base.
Maximum shear: KN at base.
Maximum ring tension: KN acting at m from top.
Maximum shear stress: N/mm²

Steel reinforcement for hoop tension:

Area of steel reinforcement: mm²/m height

Using mm diameter bars, Spacing = mm

Provide mm diameter bars at mm c/c.

Check for thickness of tank wall:

[From cracking considerations:]
Thickness of tank wall: mm

Safe.! It is within the limit, hence OK...!

Not safe It is not within the limit, hence not ok. Change the thickness and re-design.

Steel for bending moment:

Area of steel for bending moment: mm²/m height.

Using mm diameter bars, Spacing = mm

Provide mm diameter bars at mm c/c.

Vertical reinforcement (at top):

Minimum vertical reinforcement at top: mm² on both direction.
Provide half reinforcement in each face: mm² on each face.

Using mm diameter bars, Spacing = mm

Provide mm diameter bars at mm on both faces.

Base slab reinforcement:

At junction of wall and base slab, provide a haunch with reinforcement 12mm diameter at 130mm c/c.

At center, top and bottom, provide a minimum steel reinforcement: mm² on both direction.

Provide half reinforcement in each face: mm² on each face.

Using mm diameter bars, Spacing = mm

Provide mm diameter bars at mm c/c top and bottom, in both wats - cradical and circumferential

Hinged base

- Circular tank -

Capacity of tank: litres
Depth of water: metre
Free board: metre
Density of water: KN/m³
Direct tensile stress in concrete: N/mm²
Tensile stress in steel N/mm²
Grade of concrete:
Grade of steel:

Characteristic strength of concrete: N/mm²
Characteristic strength of steel: N/mm²
Modular ratio: N/mm²
Diameter of tank: m
Overall height of tank: m
Assumed thickness of walls and base slab: mm

Bending moment, ring tension and shear:

Maximum bending moment: KNm/m at base.
Maximum shear: KN at base.
Maximum ring tension: KN acting at m from top.
Maximum shear stress: N/mm²

Steel reinforcement for hoop tension:

Area of steel reinforcement: mm²/m height

Using mm diameter bars, Spacing = mm

Provide mm diameter bars at mm c/c.

Check for thickness of tank wall:

[From cracking considerations:]
Thickness of tank wall: mm

Safe.! It is within the limit, hence OK...!

Not safe It is not within the limit, hence not ok. Change the thickness and re-design.

Steel for bending moment:

Area of steel for bending moment: mm²/m height.

Using mm diameter bars, Spacing = mm

Provide mm diameter bars at mm c/c.

Vertical reinforcement (at top):

Minimum vertical reinforcement at top: mm² on both direction.
Provide half reinforcement in each face: mm² on each face.

Using mm diameter bars, Spacing = mm

Provide mm diameter bars at mm on both faces.

Base slab reinforcement:

At junction of wall and base slab, provide a haunch with reinforcement 12mm diameter at 130mm c/c.

At center, top and bottom, provide a minimum steel reinforcement: mm² on both direction.

Provide half reinforcement in each face: mm² on each face.

Using mm diameter bars, Spacing = mm

Provide mm diameter bars at mm c/c top and bottom, in both wats - cradical and circumferential

Rectangular beam

- Single reinforced -

Clear span: m
Width of support: metre
Grade of concrete:
Grade of steel:

Select type of support:

Simply supported
Cantilxer

Loads:

Create new udl

Create new point load

Effective coner: m

Total udl: KN/m²
Total point load: KN
Provided effective depth: mm
Maximum bending moment: KNm
Breadth: mm
Total depth: mm
Required effective depth: mm

Area of steel: mm²
Assume mm diameter bars.
No of bars: nos
Area of steel provided: mm²
Spacing between bars: mm

Rectangular beam

- Double reinforced -

Clear span: m
Width of support: metre
Grade of concrete:
Grade of steel:

Select type of support:

Simply supported
Cantilxer

Loads:

Create new udl

Create new point load

Effective coner: m

Total udl: KN/m
Total point load: KN
Effective span: m
Maximum bending moment: KNm
Provided effective depth: mm
Breadth: mm
Total depth: mm
Required effective depth: mm

Mulim: KNm

Area of steel [1]: mm²
Area of compression reinforcement: mm²
Assume mm diameter bars.
No of bars in compression side: nos
Area of steel provided in compression side: mm²
Area of steel [2]: mm²
Total area of steel in tension: mm²
Assume mm diameter bars.
No of bars in tension: nos

RCC Column

- Rectangular cross section -

Dimentions of column: mm mm
Axial load: KN
Grade of concrete:
Grade of steel:

Factored load: KN
Gross area of column: mm²
Assume emin < 0.05D
Area of steel reinforcement: mm²
Provide steel reinforcement bars of size mm diameter
No of bars: Nos
Longitudinal reinforcement Provided: mm²
Minimum longitudinal reinforcement: mm²
Maximum longitudinal reinforcement: mm²

Provide lateral ties of diameter [Should be greater than 6mmθ]: mm
Spacing of lateral ties: mm

RCC Column

- Circular cross section -

Axial load: KN
Grade of concrete:
Grade of steel:

Factored load: KN
Assume area of steel [ASC]: % of gross area [Ag]
Gross area of column: mm²
Diameter of circular column: mm
Area of steel: mm²
Provide: mm diameter bars,
No of bars Nos
Provide: mm diameter bars as lateral ties
Spacing of lateral ties: mm

RCC Column

- Hellical reinforcement -

Axial load: KN
Grade of concrete:
Grade of steel:
Effective cover: mm

Factored load: KN
Assume area of steel [ASC]: % of gross area [Ag]
Gross area of column: mm²
Diameter of circular column: mm
DC: mm
Area of steel reinforcement: mm²
Area of concrete: mm²
Provide: mm diameter bars,
Volume of Hellical reinforcement: mm³
Spacing: mm

Slab

- Simply supported -

Dimentions of slab: m m
Thickness of masonry wall: mm
Grade of concrete:
Grade of steel:

Loads:

Create new Load

Effective cover: mm
Assume effective depth: mm

ly/lx ratio:

Total depth of slab: mm
Effective span: m

Self weight of slab: KN/m²
Total load: KN/m²
Ultimate load: KN/m²
Bending moment: KN/m
Effective depth [1]: mm
Effective depth [2]: mm
Required effective depth: mm

Minimum replacement for: mm²
Provide reinforcement [ greater than minimum reinforcement ] : mm²
Provide: mm diameter bars
Spacing of main reinforcment: mm

mm²

Provide: mm diameter bars
Spacing of reinforcement in Y-direction: mm

Slab

- Cantilever -

Length of Cantilever slab: m
Width of supporting wall: mm
Depth of slab at support: mm
Depth of slab at free end: mm
Grade of concrete:
Grade of steel:

Loads:

Create new Load

Effective cover: mm

Effective depth of slab at support: mm
Effective span: m
Self weight: KN/m²
Total load: KN/m²
Ultimate load: KN/m²
Bending moment: KN/m
Effective depth [1]: mm
Effective depth [2]: mm
Hence provide effective depth: mm
Total depth of slab at support: mm
Minimum reinforcement area: mm²
Provide bars of diameter:
Spacing of steel bars: mm
Provide distribution bars of diameter:
Spacing of distribution bars: mm

Structural design

Spherical Dome

Loads:

Forces

Design of Ring beam

Size of ring beam:

Spherical Dome

Loads:

Forces

Design of Ring beam

Size of ring beam:

Spherical Dome

Loads:

Forces

Design of Ring beam

Size of ring beam:

Conical Dome

Loads:

Forces

Design of Ring beam

Size of ring beam:

Conical Dome

Loads:

Forces

Design of Ring beam

Size of ring beam:

Conical Dome

Loads:

Forces

Design of Ring beam

Size of ring beam:

Flexible base

Reinforcement in tank wall

Distribution and temperature reinforcement in vertical direction.

Design of tank floor slab.

Fixed base

Bending moment, ring tension and shear:

Steel reinforcement for hoop tension:

Check for thickness of tank wall:

Steel for bending moment:

Vertical reinforcement (at top):

Base slab reinforcement:

Hinged base

Bending moment, ring tension and shear:

Steel reinforcement for hoop tension:

Check for thickness of tank wall:

Steel for bending moment:

Vertical reinforcement (at top):

Base slab reinforcement:

Rectangular beam

Loads:

Rectangular beam

Loads:

RCC Column

RCC Column

RCC Column

Slab

Loads:

Slab

Loads: