Kupdf.net_wind-load-design-nscp-2015.pdf

SECTION 207C – Buildings MWFRS (Envelope Procedure) Part 2: Enclosed Simple Low-Rise Buildings #4. Determine the design wind loads for the concrete three story house below. Location: Bulacan Exposure C in all directions Roof slope: 30°

9m

25m 12m

SECTION 207C – Buildings MWFRS (Envelope Procedure) Part 2: Enclosed Simple Low-Rise Buildings #4. Determine the design wind loads for the three story house below. 1.

Mean roof height h = 10.732m

2.

Enclosure Classification, Enclosed

3.

Approximate natural frequency

na  43.5 / h

0.9

 43.5 /10.372

Sec 207A.10 Eq. 207A.9-3 0.9

 5.30 Hz

Building is Rigid 4.

Occupancy IV

Table 103-1

5.

Basic Wind Speed, V = 260 kph

Figure 207A.5-1A

7.

Exposure Category : Exposure B

8.

Topographic Factor, Kzt = 1.00

Sec 207A.8

9.

Adjustment Factor, λ=1.4433

Figure 207C.6-1

SECTION 207C – Buildings MWFRS (Envelope Procedure) Part 2: Enclosed Simple Low-Rise Buildings #4. Determine the design wind loads for the three story house below. 10.

Design pressure at h=9m and Exposure B, Ps30 or Ps9

Figure 207C.6-1

Ps30/Ps9

Basic Wind Speed (kph)

Roof Anlge (degrees)

250

30

260

30

300

30

Zones Load Case

Horizontal Pressures

Vertical Pressures

Overhangs

A

B

C

D

E

F

G

H

EOH

GOH

1

2.06

1.41

1.64

1.13

0.16

-1.25

0.05

-1.07 -0.72 -0.83

2

2.06

1.41

1.64

1.13

0.79

-0.62

0.68

-0.44 -0.72 -0.83

1

2.24

1.53

1.78

1.23

0.17

-1.4

0.06

-1.2

-0.8

-0.9

2

2.24

1.53

1.78

1.23

0.86

-0.7

0.74

-0.5

-0.8

-0.9

1

2.97

2.03

2.36

1.62

0.23

-1.80

0.08

-1.55 -1.04 -1.19

2

2.97

2.03

2.36

1.62

1.14

-0.89

0.99

-0.63 -1.04 -1.19

SECTION 207C – Buildings MWFRS (Envelope Procedure) Part 2: Enclosed Simple Low-Rise Buildings #4. Determine the design wind loads for the three story house below. 11.

Simplified design pressure, Ps

Equation 207C.6-1

ps   K zt pS 30 Zones Load Case

Horizontal Pressures A

1 2

B

C

D

Vertical Pressures

Overhan gs

E

EOH

F

G

H

GO H

Ps30/Ps9

2.24 1.53 1.78 1.23 0.17 -1.40 0.06 -1.20 -0.80 -0.90

Ps

3.23 2.21 2.57 1.78 0.25 -2.02 0.09 -1.73 -1.15 -1.30

Ps30/Ps9

2.24 1.53 1.78 1.23 0.86 -0.70 0.74 -0.50 -0.80 -0.90

Ps

3.23 2.21 2.57 1.78 1.24 -1.01 1.07 -0.72 -1.15 -1.30

SECTION 207C – Buildings MWFRS (Envelope Procedure) Part 2: Enclosed Simple Low-Rise Buildings #4. Determine the design wind loads for the three story house below.

LOAD CASE 1

SECTION 207C – Buildings MWFRS (Envelope Procedure) Part 2: Enclosed Simple Low-Rise Buildings #4. Determine the design wind loads for the three story house below.

LOAD CASE 2