Sample Calculatio for Design of Structures and Foundations for Vibrating Machines

7/25/2019 Sample Calculatio for Design of Structures and Foundations for Vibrating Machines

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5.0 BLOWER FOUNDATION (551-B-1001/2001/3001/4001)

5.1 General Sketch

Combined C.G

X direction

Y direction

C.G of Machine

[ unit : m ]

200

Z direction G.L

X direction [ unit : m ]

1.406

0.000

3.000

3.000

P L A N

1.945

0.000

10.000

TOG EL.+100,

3.645

1.784

0.294

5.346

1.443

10.000

0.000

5.069

1.216

AXISOFROCKING

0.000

3.550

S E C T I O N

1.850

0.200

1.000

0.500


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5.2 The Soil and Foundation Parameters

Allowable Soil Beraing

Shear Modulus, G

Soil Internal damping Ratio

Poisson's Ratio,

Unit Weight (Soil)

Unit Weight (Con'c)

5.3 Foundation Data

Height (h)

Thickness of Grout

5.4 Equipment Data

=

=

=

=

=

5.5 Machine Data

(1) For values for Equipment

R.P.M

Rotor Weight

Unbalanced Force

ton

C.A.BLOWER - 2242

C.A.BLOWER - 3.670

C.A.BLOWER - 0.072

ton

rpm

ton

MOTOR - 1490

m

m

0.040

17.000

m

kN/m

0.321

Pedestal Height (PH)

rpm

kN

m

m

Weight of Motor (Wm)

1.200

0.025

m

25.506

0.500

ton

ton

ton6.000

m

304.110 kN

kN

kN

58.860 kN

200.000

24.000

82579.233

kN/m

Item No.

Footing Width (FL)

551-B-1001/2001/3001/4001

m

kN/m

kN/m

3.000

ton

Ground Level (G.L.)

Footing Length (FB)

Footing Height (FH)

Pedestal Width (PL)

Pedestal Length (PB)

Weight of C.A.BLOWER (Wc) 127.530

92.214

Total Weight (Wt) 31.000 ton

Weight of Base Plate (Wb)

Weight of Silencer (Ws)

ton

10.000

3.000

0.200

1.700

m10.000

13.000

2.600

9.400


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(2) For dimensions of Equipment & Foundation

C.G from machines bottom to Machine center

C.G of Shaft from machines bottom (C.Gshaft)

C.G from Pedestal Edge to Machine Center (X-direction) (Edx)

C.G from Pedestal Edge to Machine Center (Y-direction) (Edy)

6.0 CHECK FOR BLOWER FOUNDATION DESIGN

6.1 The Mass Ratio of Blower Foundation

(1) Foundation Weight Pedestal (Wcp)

Footing (Wcf)

= [(FL FB FH) + (PL PB PH)] Unit Weight (Con'c)

= [(3.000 m 10.000 m 0.500 m) + (3.000 m 10.000 m 1.200 m)] 24.000

= kN

(2) Machine Weight

= Weight of Blower + Weight of Motor + Weight of Base Plate + Weight of Silencer

= 127.530 + 92.214 + 25.506 + 58.860

= kN

(3) Mass Ratio

= / >

= / >

= >

6.2 The Minumum Thickness of Concrete Foundation

- Thickness (= FH + PH) 0.6 + FB / 30 (m)

0.933

OK!!

Wc

360.000 kN

OK!!

0.6 + FB / 30 (m)Length ( = FB)

(m)

Thickness ( = FH + PH)

(m)

1.700

3.0

864.000 kN

Item No.

551-B-1001/2001/3001/4001 10.000

(m)

3.0

4.025

R

304.110

Wm

1.850

3.0

Wc

m

m

m

1.945 m

5.346

Wm

304.110

1224.000

1224.000

1.216


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6.3 The Width of Concrete Foundation

- FL 1.5 Vertical Distance from The Base to the Machine Centerline

6.4 Allowable Soil Bearing Pressure (Static)

[kN/m]

= 1,528.110 / 30.000

= kN/m

Where,

= [kN/m]

= 0.750 200.000

= kN/m

= Allowable soil capacity for static case.

= kN/m

= + [kN]

= 1,224.000 + 304.110

= kN

= 0.25 Wm (FH + PH + G. [kN-m]

= 0.250 304.110 (0.500 + 1.200 + 1.850)

= kN-m

= FB FL [m]

= 10.000 3.000

= m

OK!!

OK!!

1.5 C.G

2.775

QItem No.

Q = 0.750 Qa

(kN/m)

Q =Wt

Area

51-B-1001/2001/3001/400 50.937

51-B-1001/2001/3001/400

150.000

269.898

(kN/m)

Length ( = FL)

(m)Item No.

(m)

A

30.000

3.000

150.000

1528.110

50.937

Wm

Qas

Mx

Qa 0.750

Wt

200.000

Qas

Wc

(JERES-Q-007 Section 9.3)

Low-tuned Foundations


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6.5 Allowable Eccentricities for Concrete Foundations

= + = kN

= [(304.110 1.216) + (864.000 1.500) + (360.000 1.500)] / 1,528.110 = m

Eccentricity(X-dir) = (1.500 - 1.443) 100 / 3.0 = < %

= [(304.110 5.346) + (864.000 5.000) + (360.000 5.000)] / 1,528.110 = m

Eccentricity(Y-dir) = (5.000 - 5.069) 100 / 10. = < %

= [(304.110 3.645) + (864.000 1.100) + (360.000 0.250)] / 1,528.110 = m

6.6 Rebar Check

a = @ 200

c = @ 200

b = @ 200

5.069

1.443

1.884

OK!!

5.000

Y'

Wt 1528.110Wc

X'

a (mm)cb Top (mm) Bottom (mm)

Rebar Dia.

Wm

Z' 1.406

D20 D20 D12 1350.000

Use AS

5.000

OK!!

Req'd AS= 0.0018 b (H / 2)

OK!!

1350.000 5024.000

0.689

Item No.

551-B-1001/2001/3001/4001


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"Dynamic Analysis.xls"

Job Name: Subject:

Job Number: Originator: TYP Checker:

1.0 Machine Data

Blower Blower =

Motor Motor =

Unbalanced Force Blower = Motor =

Moment by U.F Blower = Motor =

1.1 Centrifugal Force (Fo)

1) F0 = (W / g) e w = (W / g) e w

= 64,750.000 / 981.0 0.00588 234.7 = 0.000 / 981.0 0.00721 234.780= N = N

= kN = kN

Where,

g = cm/sec = cm/sec

w = (RPM 2 / 60) = (RPM 2 / 60)

= 2,242 2 / 60 = 1,490 2 / 60

= rad/sec = rad/sec

e = (12000 / RPM) 0.0025 (cm) = (12000 / RPM) 0.0 (cm)

(Maximum) = (12000 / RPM) (mil) = (12000 / RPM) (mil)

= 1.000 (12000 / 2,242) = 1.000 (12000 / 1,490)

= (mil) = (mil)= cm = cm

Weight of Rotor of Blower Weight of Rotor of Motor

Wr = 1.000 = 0.000

= ton = ton

= kN = kN

Wc = Weight of C.A.BLOWER = 13.000 ton = kN

Wm = Weight of Motor = 9.400 ton = kN

Wb = Weight of Base Plate = 2.600 ton = kN

Ws

= Weight of Silencer = 6.000 ton = kN

2) F0 = Factor W (rpm / 1000)1.5 = Factor W (rpm / 1000)

1.5

= 0.001 600.408 (2242 / 1000)^1 = 0.001 0.000 (1490 / 1000)^1.5

= kN = kN

= ton = ton

R.P.M Rotor Weight

0.405 ton

0.600 ton

0.000 ton

For Motor

0.205

0.000

For Motor

0.205

0.000

92.214

25.506

0.000

For Blower

981

234.780

2.314

1490 rpm

For Blower

234.780

0.000 ton

DYNAMIC ANALYSIS

Design of Structures and Foundations for Vibrating Machines

981

64.750

For Block Foundation (Centrifugal Machinery)

127.530

58.860

2.016

1.000 (mil)

2.838

0.000

0.000

0.00721

2242 rpm

21384.054

21.384

0.00588

6.600

1.437 ton-m 0.000 ton-m

(Wc(rotor)+ Ws) (Wm(rotor))

Sample Calculatio for Design of Structures and Foundations for Vibrating Machines

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