Wind BS en 1991-1-4 Esf [PDF]

Zitiervorschau

WIND LOAD COMPUTATION (BS EN 1991-1-4 + UK NA) WITH z ≤ 50m Vb,0 =

34.98 m/s

calt =

1.01

cdir =

fundamental value of the basic wind velocity altitude factor

NA.2.5

1

directional factor

4.2

cseason =

1

seasonal factor

4.2

cprob =

1

probability factor

(4.2) 4.1

Vb =

calt x cdir x cseason x cprob xVb,0

basic wind velocity

Vb =

35.3298 m/s 2.226 kg/m³

air density

½ r v²b

basic velocity pressure

(4.10)

exposure factor

fig NA.7

exposure correction factor for site in Town upwind slope H/Lu

fig NA.8

orographic location factor

A.3

orography coefficient

A.3

Peak velocity pressure

(NA.4a)

r= qb = qb =

4.5

1.389 kPa

ce(z) =

2.8

ceT =

1

Φ= s= c0 =

0 0

qp(z) =

NA.2.18

1 3.88987 kPa

A.3

WIND LOAD COMPUTATION (BS EN 1991-1-4 + UK NA) WITH z > 50m Vb,0 =

34.98 m/s

calt =

1.01

cdir =

fundamental value of the basic wind velocity altitude factor

NA.2.5

1

directional factor

4.2

cseason =

1

seasonal factor

4.2

cprob =

1

probability factor

(4.2)

basic wind velocity

4.1

Vb = Vb = r=

calt x cdir x cseason x cprob xVb,0

35.33 m/s 2.226 kg/m³

Φ= s= c0 =

0 0

cr(z) =

1.1

air density upwind slope H/Lu

NA.2.18

4.5 A.3

orographic location factor

A.3

orography coefficient

A.3

exposure factor

fig NA.7

exposure correction factor for site in Town

fig NA.8

mean velocity

(4.3)

0.18

turbulence Intensity for iste in Country terrain

fig NA.5

turbulence correction factor for Town terrain

fig NA.6

Iv(z) =

1 Iv(z)flat x KI,T/co

turbulence Intensity

NA.2.16

Iv(z) =

0.18

qp(z) =

3.98662 kPa

Peak velocity pressure

(NA.4b)

crT = vm(z) = vm(z) = Iv(z)flat = kI,T =

1 1 cr(z) x co(z) x vb x crT 38.86 m/s

have = h= x=

3m 100 m 1m

average height height seperation distance

hdis =

2.4 m

displacment height

Terms & Conditions of WIND BS EN 1991-1-4 v2013 ESF Disclaimer

No Liability is accepted by its software authors for any direct, indirect, consequential or incidental loss or damage arising out of or any mistakes and negligence in developing this software. The organisation or person using the software bears all risks and the quality and performance of the software. Your Usage

The software is intended to help you save time and effort in calculations. Please check and validate all results carefully. You a and liable for all consequences of its use. Software Distribution Policy

This product is being distributed as a part of our policy to pool, share and grow technical expertise with students and fellow eng

You can freely use this product for your personal or business design work. This product however remains our copyright. You m reproduce and distribute it provided that each copy shall be a true and complete copy, including all copyright and trademark no such distribution shall not be for commercial purposes. Technical Support and Contacting Us

We welcome and value all comments and suggestions via email. However, we do not provide formal technical support. As a possible, your comments will be used to improve our software in the future. Your feedback is very important to us. The email a Email: [email protected]

Ó 2013 E