Wind Analysis (CP3 British Standard) Updated

12.52 m

12.00 m

10.35 m

45.00 m/s

A from Section 5.4 0r Table 2 of CP 3: Chapter V Part 2

1.00 from Section 5.5.1 of CP 3: Chapter V Part 2

A from Section 5.5.2 of CP 3: Chapter V Part 2

1.00 from Figure 2 of CP 3: Chapter V Part 2

0.95 Force Coefficient from Table 10

Topographic Location

Ground Roughness

Cladding & Building Size Class

S3 - Multiplying Factor Relating to Life of Structure

Cf

PROJECT INFORMATION

Building Analysis Data

Length of Building

Width of Building

Height of Building

Basic Wind Speed (V)

Table 2 or Section 5.4

Table 3

Section 5.5.1

Section 5.5.2

Tabe 10 force coefficient

Calculate and View Result

from Section 5.4 0r Table 2 of CP 3: Chapter V Part 2

from Section 5.5.1 of CP 3: Chapter V Part 2

from Section 5.5.2 of CP 3: Chapter V Part 2

PROJECT INFORMATION

Wind Analysis Data for CP3 Chapter V Part 2

12.5200 m

12.000 m

10.350 m

45.00 m/s




= Characteristic Wind Pressure (N/m2)

= Design Wind Speed (m/s)

( from Section 4.3 of CP 3: Chapter V Part 2 )

= Multiplying Factor Relating to topology

( from Table 2 of CP 3: Chapter V Part 2 )

= Multiplying Factor Relating to Height above Ground & Wind Breaking

( from Table 3 of CP 3: Chapter V Part 2 )

= Multiplying Factor Relating to Life of Structure

( from Figure 2 of CP 3: Chapter V Part 2 )

= m/s

= N/m2

= kN/m2

= Force Coefficient

= kN/m2

Design Wind Pressure Cf.Wk

= kN/m2

Length of Building

Vs


Cf.Wk 1.251

Wind Load Calculation

Ground Roughness

Cf

Cf • Wk 1.251

1.317

1.00

1316.922

0.950

Wind Pressure Calculation

Vs

Wk

Wk

Wk

V • S1 • S2 • S3

46.35

S1

WIND LOAD CALCULATION

Width of Building

Height of Building

S2

0.613 • Vs2

S3

1.03

1.00



Design Wind Pressure Cf.Wk

= kN/m2

DIRECTION 1 +

Height Width Area Force Total Force Location

0.2 12.52 2.504 3.133

1.65 12.52 20.658 25.845

1.65 12.52 20.658 25.845

1.65 8.514 14.0481 17.575

1.65 8.514 14.0481 17.575

1.5 7.35 11.025 13.793

1.5 7.35 11.025 13.793

0.25 7.35 1.8375 2.299

DIRECTION 1 -


0.2 12.52 2.504 3.133

1.65 12.52 20.658 25.845

1.65 12.52 20.658 25.845

1.65 8.514 14.0481 17.575

1.65 8.514 14.0481 17.575

1.5 7.35 11.025 13.793

1.5 7.35 11.025 13.793

0.25 7.35 1.8375 2.299

DIRECTION 2 +


0.2 12 2.4 3.003

1.65 12 19.8 24.771

1.65 12 19.8 24.771

1.65 12 19.8 24.771

1.65 12 19.8 24.771

1.5 6 9 11.260

1.5 6 9 11.260

0.25 6 1.5 1.877

DIRECTION 2 -


0.2 12 2.4 3.003

1.65 12 19.8 24.771

1.65 12 19.8 24.771

1.65 12 19.8 24.771

1.65 12 19.8 24.771

1.5 6 9 11.260

1.5 6 9 11.260

0.25 6 1.5 1.877

31.368UPPER

STOREY 4LOWER

16.092UPPER

UPPER

STOREY 3

Cf.Wk 1.251

28.977LOWER

UPPERSTOREY 1

STOREY 2LOWER

43.420

49.543

36.031

13.136

28.977

43.420

31.368

16.092

STOREY 1LOWER

27.774UPPER

STOREY 2LOWER

49.543UPPER

LOWER

STOREY 3LOWER

36.031UPPER


5.449

4.001

3.675

6.000

STOREY 4LOWER

13.136UPPER

27.774

6.260

5.449

4.001

3.675

6.260

6.000

5.063

3.000

6.000

6.000

5.063

3.000

STOREY 1

STOREY 2

STOREY 3

STOREY 4

STOREY 1

STOREY 2

STOREY 3

STOREY 4

LOWER

UPPER

LOWER

UPPER

LOWER

UPPER

LOWER

UPPER

LOWER

UPPER

UPPER

LOWER

UPPER

LOWER

UPPER

LOWER

4

3

2

1

4

3

2

1

4

3

2

1

4

3

2

1

= 1 & 2

+ + 3 4

Wind Analysis Data for CP3 Chapter V Part 2

OPTION 1: CONCENTRATED LOAD ON BEAM-COLUMN JOINT

Dir1 Dir2

A or B A or B

4.563 m2 3.269 m

2

1.258 m2 0.958 m

2

5.821 m2 4.227 m

2

cf.wk x Area(A) cf.wk x Area(A)

7.300 kN 5.300 kN

C or D C or D

3.637 m2 2.606 m

2

0.000 m2 0.000 m

2

3.637 m2 2.606 m

2

4.600 kN 3.300 kN

OPTION 2: UNIFORMLY DISTRIBUTED LOAD ON COLUMN

Dir1 Dir2

A or B (Parapet) A or B (Parapet)

1.258 m2 0.958 m

2


1.600 kN 1.200 kN

A or B A or B

2.645 m 1.895 m

cf.wk x width(A) cf.wk x width(A)

3.400 kN/m 2.400 kN/m

OPTION 3: CONCENTRATED LOAD ON THE CENTER OF BUILDING WIDTH PER FLOOR

Dir1 Dir2

A A

9.125 m2 6.538 m

2

2.516 m2 1.916 m

2

11.641 m2 8.454 m

2


14.600 kN 10.600 kN

B B

7.274 m2 5.211 m

2

0.000 m2 0.000 m

2

7.274 m2 5.211 m

2


9.200 kN 6.600 kN


0.5

0

0.4

0

2.4

5

0.1

5

2.1

25

1

.37

5

A B

C D

0.5

0

0.4

0

2.4

5

0.1

5

A B

0.5

0

0.4

0

2.4

5

0.1

5

2.1

25

1

.37

5

A

B

a All cases except those in b and c

b Very exposed hill slopes and crests where

acceleration of the wind is known to occur

c steep sided, enclosed valleys sheltered fromm all winds


b

c

1.1

0.9

Topography Factor

Topography Value of S1

a 1

GO TO DATA INPUTS

Height A B C Height A B C Height A B C Height A B C

1 0.83 0.78 0.73 1 0.72 0.67 0.63 1 0.64 0.6 0.55 1 0.56 0.52 0.47

2 0.83 0.78 0.73 2 0.72 0.67 0.63 2 0.64 0.6 0.55 2 0.56 0.52 0.47

3 0.83 0.78 0.73 3 0.72 0.67 0.63 3 0.64 0.6 0.55 3 0.56 0.52 0.47

5 0.88 0.83 0.78 5 0.79 0.74 0.7 5 0.7 0.65 0.6 5 0.6 0.55 0.5

10 1 0.95 0.9 10 0.93 0.88 0.83 10 0.78 0.74 0.69 10 0.67 0.62 0.58

15 1.03 0.99 0.94 15 1 0.95 0.91 15 0.88 0.83 0.78 15 0.74 0.69 0.64

20 1.06 1.01 0.96 20 1.03 0.98 0.94 20 0.95 0.9 0.85 20 0.79 0.75 0.7

30 1.09 1.05 1 30 1.07 1.03 0.98 30 1.01 0.97 0.92 30 0.9 0.85 0.79

40 1.12 1.08 1.03 40 1.1 1.06 1.01 40 1.05 1.01 0.96 40 0.97 0.93 0.89

50 1.14 1.1 1.06 50 1.12 1.08 1.04 50 1.08 1.04 1 50 1.02 0.98 0.94

60 1.15 1.12 1.08 60 1.14 1.1 1.06 60 1.1 1.06 1.02 60 1.05 1.02 0.98

80 1.18 1.15 1.11 80 1.17 1.13 1.09 80 1.13 1.1 1.06 80 1.1 1.07 1.03

100 1.2 1.17 1.13 100 1.19 1.16 1.12 100 1.16 1.12 1.09 100 1.13 1.1 1.07

120 1.22 1.19 1.15 120 1.21 1.18 1.14 120 1.18 1.15 1.11 120 1.15 1.13 1.1

140 1.24 1.2 1.17 140 1.22 1.19 1.16 140 1.2 1.17 1.13 140 1.17 1.15 1.12

160 1.25 1.22 1.19 160 1.24 1.21 1,18 160 1.21 1.18 1.15 160 1.19 1.17 1.14

180 1.26 1.23 1.2 180 1.25 1.22 1.19 180 1.23 1.2 1.17 180 1.2 1.19 1.16

200 1.27 1.24 1.21 200 1.26 1.24 1.21 200 1.24 1.21 1.18 200 1.22 1.21 1.18

Ground Roughness

Height of Building = 10.35 1 1.03

Height of Building = 15 2 1

Cladding & Building Size Class = A 3 0.88

Ground Roughness = 1.00 4 0.74

s2 = 1.03

(1) Open Country with No Obstructions(4) Surface with large and frequent

obstructions, e.g. city centes

(2) Open Country with

Scattered Windbreaks

(3) Country with many windbreaks;

Small towns; outskirts of large cities

GO TO DATA INPUTS

Ground Roughness 1 Long fetches of open, level or nearly level country with no shelter.

Examples are flat coastal fringes, fens, airfields and grasslands,

moorland or farmland without hedges or walls around the fields.

Ground Roughness 2 Flat or undulating country with obstructions such as hedges or walls

around fields, scattered windbreaks of tress and occasional buildings.

Examples are most farmland and country estates with the exception

of those parts that are well wooded.

Ground Roughness 3 Surfaces covered by numerous large obstructions.

Examples are well-wooded parkland and forest areas, towns and their

shrubs, and their suburbs, and the outskirts of large cities. The general

level of rooftops and obstructions is assumed at about 10m, but the

category will include built-up areas generaaly apart from those that

qualify for category 4.

Ground Roughness 4 Surfaces covered by numerous large obstructions with a general

roof height of about 25 m, or more. This category covers onty the

centres of large towns and cities where the buildings are not only

high, but are also bot too widely spaced,

GROUND ROUGHNESS CATEGORY

GO TO DATA INPUTS

CLASS A All units of cladding, glazing and roofing and their immediate

fixings and individual members of unclad structures

CLASS B All buildings and structures where neither the greatest horizontal

dimension nor the greatest vertical dimension exceeds 50 m (165ft).

CLASS C All buildings and structures whose greatest horizontal dimension

and greatest vertical dimension exceeds 50 m (165ft).

CLADDING AND BUILDING SIZE CATEGORY

GO TO DATA INPUTS

0.5 1 2 4 6 10 20

>4 1.2 1.3 1.4 1.5 1.6 1.6 1.6

<1/4 0.7 0.7 0.75 0.75 0.75 0.75 0.75

3 1.1 1.2 1.25 1.35 1.4 1.4 1.4

1/3 0.7 0.75 0.75 0.75 0.8 0.8 0.8

2 1 1.05 1.1 1.15 1.2 1.2 1.2

1/2 0.75 0.75 0.8 0.85 0.9 0.9 0.9

1.5 0.95 1 1.05 1.1 1.15 1.15 1.15

2/3 0.8 0.85 0.9 0.95 1 1 1

1 1 0.9 0.95 1 1.05 1.1 1.2 1.4

cf = 0.95

h/b HEIGHT OVER BREADTH RATIO

cf FORCE COEFFICIENT

4

3

2

1.5

L/W b/d

GO TO DATA INPUTS

12.52 m

12.00 m

10.35 m

45.00 m/s




1.00 from Figure 2 of CP 3: Chapter V Part 2

0.95 Force Coefficient from Table 10

PROJECT INFORMATION

Cf


Building Analysis Data


Width of Building

S3 - Multiplying Factor Relating to Life of Structure


Ground Roughness

Length of Building

Height of Building

Calculate and View Result

Table 3

Table 2 or Section 5.4

Section 5.5.1

Section 5.5.2

Table 10 force coefficient

Wind Analysis (CP3 British Standard) Updated

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