Reference Calculation Output

Wind load calculations:

Local Standard For post disaster , wind zone -3 area, for wind Basic wind speed = 38m/sTable 3-1

CP-3 Chapter v

Topography factor S1 = 1Statistical factor S3 = 1

Ground roughness factor S2:Ground roughness : Class 4 (Surface with large and frequent

obstructions)Building class : B ( Neither the greatest horizontal dimension nor the

greatest verticle dimension exceeds 50m.)

Local Standard For Sri Lankafor wind

CP-3 Chapter v b= 30.55 m l/w = 30.55/24.1Table 10 l= 30.55m = 1.27

d= 24.1mw= 24.1m b/d = 30.55/24.1

= 1.27

height/ breadth = 40/24.1= 1.66= 0.98

Specimen calculation for First floor level:

Height = 4.7mHence S2 factor = 0.55

= 38x1x0.55x1= 20.9 m/s

q =

= 257.7F = 0.98x257.7x(3.5x5.9)

= 5.21kN

Similarly wind forces at every floor level could be calculated.

Project : Dahampaya Feature Frame Analysis

DESIGN UNIT Designed Date

Vs= Vx S1 x S2 x S3

Dynamic pressure of the wind (q) = K.Vs2

K=0.59 N/m2

Wind force (F) = Cf . q. Ae

Force coefficient (Cf)

Cf

Vs

0.59x(20.9)2

N/m2

DEC

Reference Calculation Output EPC DIVISION Checked Date

CENTRAL ENGINEERING CONSULTANCY BUREAU Job Code D-676 Page 04 of 08

Wind forces at roof:

CP-3 Chapter vTable 8

h/w = 1.66 ( 3/2 <(h/w)<6)

Cpe facotrs for the roof

Appendix E Assume four faces equally permeable Cpi = 0.3

(Cpe- Cpi) factors

Wind force on roof "A" == 5.05 kN

Wind force on roof "B" == (-10.1) kN

θ

Resultant horizontal force at roof ( R ) = += 10.36kN

HorizontalThe calculated wind forces for the frame could be summarized as force from rooffollows. = 10.4kN

Project : Dahampaya Feature Frame Analysis

DEC

Pressure co-efficents Cpe for pitch roofs:

Roof pitch 40 ْ

The critical condition applies to the frame, when α=0 ْ

Wind force (F) = (Cpe- Cpi). q. Ae

0.1x604.2x (9.152)

(-0.2)x604.2x (9.152)

5.05 cos 40° 10.1sin 40°

-0.2 -0.5

A B

0.1 -0.2

A B

5.05kN 10.1kN

Reference Calculation Output DESIGN UNIT Designed Date

EPC DIVISION Checked Date

CENTRAL ENGINEERING CONSULTANCY BUREAU Job Code D-676 Page 05 of 08

Floor Level H q F(m) (m/s) (KN)

Ground 1.2 0.52 19.76 230.4 17.4 3.93

First 4.7 0.55 20.9 257.7 20.65 5.21

Second 8.2 0.59 22.4 296 20.65 5.99

Third 11.7 0.63 23.94 338.1 20.65 7

Fourth 15.2 0.69 26.22 405.6 20.65 8.2

Fifth 18.7 0.73 27.74 454 20.65 9.19

Sixth 22.2 0.77 29.26 505.1 20.65 10.22

Seventh 25.7 0.8 30.4 545.2 25 13.3

Eighth+roof 30.7 0.84 32 604.2 14.75 8.7 + 10.4= 19.1

Frictional Drag:

h = Height to the eaves = 40m

b = Dimension normal to wind = 30.55m

d = Dimension in wind direction = 24.1m

d/h = (24.1/40) = 0.6 < 4

d/b = (24.1/30.55) = 0.8 < 4

Frictional drag is not neccesary.

DEC

S2 Vs Ae

(N/m2) (m2)

Reference Calculation Output

Project : Dahampaya Feature Frame Analysis

DESIGN UNIT Designed Date

EPC DIVISION Checked Date

CENTRAL ENGINEERING CONSULTANCY BUREAU Job Code D-676 Page 06 of 08

Notional Horizontal loadSpecimen Calculation of Notional horizontal loads for frame 7 (A-K):

Consider first floor level:Weight of beams = 135.3kN(0.3x0.375x(20+26.85)x24) +(0.225x0.4x4.1x24)

Weight of slab = 418kN(0.15x24x(47.2+14.6) +(0.175x24x5.9x7.5) + (0.125x24x2x1.6)

Weight of finishes = 109.3kN(1x(91.5+14.6+3.2))

Weight of Brick walls = 318.3kN(5.2x2.95x(5.9+2.65+8.6+3.6))

Weight of Columns = 112.5kN(0.5x0.5x24x3.5x5)+(0.3x0.3x24x3.5)Total = 1093.4kN

Therefore Notional horizontal load at First Floor level = 0.015x 1094 kN Notinal Load

= 16.4kN = 16.4 kN

Simillarly Notional load for other floor levels also calculated.

Comparison of Horizontal loads:

Floor level Wind Force NHLKN

Ground 3.9 4.68 5.5 24

1 5.2 6.24 7.3 16.4

2 6 7.2 8.4 16.4

3 7 8.4 9.8 16.4 Notional loads

4 8.2 9.84 11.5 16.4 Critical

5 9.2 11.04 12.9 15

6 10.2 12.2 14.3 15

DEC

1.2Wk 1.4Wk

Reference Calculation Output7 13.3 16 18.6 16 Wind

loads8 20.3 24.4 28.5 18.5 Critical

Project : Dahampaya Feature Frame Analysis

DESIGN UNIT Designed Date

EPC DIVISION Checked Date

CENTRAL ENGINEERING CONSULTANCY BUREAU Job Code D-676 Page 07 of 08

After finding verticle and horizontal loading for the frame, frame analysis was done using "Etab" software.Relevant Input and output files are attached here with.

DEC

Reference Calculation Output

Project : Dahampaya Feature Frame Analysis

DESIGN UNIT Designed Date

EPC DIVISION Checked Date

CENTRAL ENGINEERING CONSULTANCY BUREAU Job Code D-676 Page 08 of 08

DEC

1.267634855

1.659751037

1.267634855

1.659751037

Notional

Reference Calculation Outputs

Project Feature DESIGN UNIT Designed Date

DEC

EPC DIVISION Checked Date CENTRAL ENGINEERING CONSULTANCY BUREAU (CECB) Job Code Page of

DEC