memorial hall- design project

DESIGN OF MEMORIAL HALL

PRESENTED BY M.ABHINAYA

J.MARTHA.JENNIFER

B.MATHANGI

GUIDED BY Ms.R.PAMILA

OBJECTIVE

To design a memorial hall for our former president Dr.A.P.J.Abdul Kalam at Pei Karumbu in Rameshwaram.

The prime idea of the design is to construct the structure in the shape of a dodecagon overlaid by a hexagon

and a dome.

The total area under construction is 1.8 acres

MEMORIAL HALL

Memorial halls are the buildings that are constructed in memory of great personalities who have given their contribution for the prosperity of the mankind. Usually memorial halls are constructed with ample of circulation space. In addition to this, space is provided for lawns, vehicle parking and greeneries.

AREA SPECIFICATIONS

• Total area is 1.8 acres = 78408 sq. ft.

• Plinth area= 40000 sq. ft.

•Dodecagon area= 180 x 180 sq. ft.

•Hexagon area= 150 x 150 sq. ft.

•Dome of base diameter 130 ft.

HEIGHT SPECIFICATIONS

• Total height of structure= 19m.

• Elevation from ground level= 4m.

•Height of dodecagon= 8m.

•Height of hexagon= 4m.

•Rise of dome= 3m.

ELEVATION

CONSTRUCTION DETAILS

• The materials used are M25 concrete and Fe415 steel.

• The hall can accommodate on a whole of 750 persons.

• In addition there will be space provided for his missile models and various other articles in his memory.

STRUCTURAL COMPONENTS

•Beams = 18.

•Ring beam = 1.

•Columns = 18.

• Slabs = 18.

•Dome = 1.

• Staircase = 1.

DESIGN DETAILS•All the slabs are designed as one way slabs.

•All the beams are simply supported doubly reinforced beams.

•Columns are designed as short columns.

•A staircase with two flights each having 12 steps and a landing.

• Pile foundation is provided.

DESIGN OF DOME

Assuming the rise of dome to be 3m.

Radius of dome

r(2R-r) = (D/2)2

Therefore, r= 67m.

Loads DL= 3.25 kN/m.

WL = 1.98 kN/m.

Total load = 5.23 kN/m.

Hoop steel = Hoop tension/st

= 14744mm2

Ast min = 0.3% of gross area = 390 mm2.

Provide 8mm diameter bars @ 250mm c/c

Ring beam 200m by 130mm

Equivalent area = Ac + (m-1)Ast = 277145.12mm2 .

Tensile stress = t/ area = 0.65 n/mm2 < 3.2 n/mm2

Design is safe

DESIGN OF SLAB ( Connecting Hexagon to Dodecagon) Longer span = 22.71m

Shorter span = 3.048m

Effective depth

d = 130mm

D = 160mm

Effective span (l) = 3.178m

The total load is calculated to be 16kN/m

Ultimate load Wu = 24kN/m

Moments

Mu = 27.8kN-m

Mu,lim = 58.33kN-m

Mu < Mu,lim

Design is safe

Main reinforcement

Ast = 1549.2mm2


Distribution reinforcement

Ast = 192mm2


REINFORCEMENT DETAILS

DESIGN OF BEAM

L = 3.048m

width of beam (b) = 200mm

Effective depth

d = 210mm

D = 260mm

The ultimate load is calculated as 166.635kN/m

Effective span = 3.208m

Moment

Mu = 166.635*3.0482/8 = 193.511kN-m

Mu,lim = 0.138fckbd2 = 30.429kN-m

Mu > Mu,lim

Reinforcements

Ast2 = 2820mm2

Ast1 = 502mm2

Ast = Ast1 + Ast2 = 3320mm2

Provide 7 bars of 25mm diameter.

Asc = 2885mm2

provide 25mm diameter bars @ 30mmc/c

Shear reinforcements

v = vu/(bd)

= 4.88N/mm2

c = 0.92N/mm2

v > c

Hence it is necessary to provide stirrups.

Vus = Vu - cbd

= 215kN.

vus = 0.87fyAsvd/sv

Therefore, sv = 35mm

Thus provide 8mm bars @ 35mm c/c.

DESIGN OF COLUMN( LOCATED ON HEXAGON CORNERS)

Let us take the columns in corners of hexagon as circular.

Assume the diameter of columns as 700mm

Total load on column (Pu) = 738.8 kN

Moment due to live load = 27.9 kN -m

Column hoop reinforcement

Asc = 3078.76mm2

Provide 6 bars 25mm diameter.

Lateral ties

Assume the diameter of the tie as 8mm

Thus, provide 8mm diameter bars @ 380mm c/c

Design of helical reinforcement

As = 3078.76mm2

Provide 6bars of 20 mm diameter

Ag = x7002/4 = 3848.45mm2

Provide 8mm diameter bars

Core diameter = 636mm

Area of core = x6362/4 = 317690mm2

Ag/Ac = 1.211

Pitch

Let pitch of spiral be “S”mm

Vh = d(s2/4)/S = 99169.7/S

Vc = Acx1 = 317690mm2

Vb/Vc = (99169.7/s)/317690 = 0.312/S

0.312/S = 0.0046

Pitch (S) = 70mm

DESIGN OF COLUMNS(LOCATED ON DODECAGON COLUMNS)

Let the column be a square column. The size of the column is assumed as 500x500mm

Ultimate load (Pu) = 768.84kN

Reinforcement

Asc = 2250mm2

Provide 6 bars of 25mm diameter.

Asc,prov = 2945mm2

Lateral ties

Provide 8mm diameter bars as lateral ties @ 380mm c/c.

DESIGN OF STAIR CASE Total height of the floor = 4m

Thus, height of each flight = 2m

Assuming Rise = 167mm

Tread = 300mm

Providing the width of landing as 1600mm.

Bearing of flight = 150mm

Effective horizontal span = 11x300+1600+150/2

= 4.975m

Thickness of waist = 40-50mm/m run of horizontal span

Ultimate load wu = 21477.75N/m2

Mu = wul2/8 = 66448.46 N-m

d = 150mm

D = 175mm

Reinforcement

Ast = 1470mm2


Distribution steel

= 0.12% of gross area

=180mm2

Provide 8mm diameter bars @ 250mm c/c.

DESIGN OF FOUNDATION(BELOW DODECAGON COLUMN)

As the sand is beach sand pile foundation is given.

Assume length of pile = 10m

Diameter of pile = 0.5m

Total load = 880 kN

Load bearing capacity of pile (Qu) = 329.86kN

No. of piles = 3

Length of pile = 2.66x10/3 = 8.8m

Spacing = 4m

DESIGN OF FOUNDATION(BELOW HEXAGON COLUMN)

Assume Pile length = 10m

Pile load (Pu)= 853kN

Load bearing capacity(Qu )= 329.86kN

No. of piles = 3

Length of pile = 2.58x10/3 = 8.6m

Spacing = 3.8m

CONCLUSIONThus, the various component of the memorial hall

building like slab, column, beam are designed as per codal provisions. Reinforcement details of the building are drafted

using auto cad.

On taking this project work we have learnt to design the various elements of a building using the various standards. It

has also provided us an immense understanding of the problems related with the design and helpful to get familiar with various software, design charts which are essentials for a civil engineer.

REFERENCES

CODE BOOKS

• IS 456 : 2000 – plain and reinforced concrete code of practice.

•Charts from SP – 16

• IS 875 (part-3) 1987 – wind load.

BOOKS

• “Soil Mechanics and Foundation engineering” by B.C.Punmia

• “Design of reinforced concrete structures” by S.Ramamrutham.

• “Limit state design” by B.C.Punmia.

• “Design of reinforced concrete structures” by N.Krishnaraju.

THANK YOU

memorial hall- design project

Engineering