Wind Load Calculation Using Eurocode
Wind Load Calculation Using Eurocode
Wind Load Calculation Using Eurocode
BasicValues
Determinationofbasicwindvelocity:
= + + ,
Where:
vb basicwindvelocity
cdir directionalfactor
cseason seasonalfactor
vb,0 fundamentalvalueofthebasicwindvelocity
, = 30m/s
TerraincategoryII = 0.05m
= + + , =30m/s
BasicVelocityPressure
= X 2
Where:
=1.25kg/m2(airdensity)
=x1.25x(30)2=562.5N/m2
Peakpressure
( ) =[1+7lv(z)]x xx (z)2
Where:
(z) =meanwindvelocity
(z) =roughnessfactor
(z) =orographyfactor=1.0
(z) = ( ) forz
Where: =roughnesslength
=terrainfactor,dependingontheroughnesslength( )calculatedusing
.
=0.19x( )
,
, =0.05(terraincategoryII)(EN199114;Table4.1)
=Minimumheight=2.0m(EN199114;Table4.1)
=Takenas200m(EN199114;section4.3.2)
( ) =Turbulenceintensity
( ) = For z
( ) ( )
= ( ) Forz
Where: =Turbulencefactor,recommendedvalueistakenas1.0
Z=3.813m;
So: z
.
( ) =[1+ ]x xx[0.19x( ) xln( )x1x ]2
( ) ( ) ,
.
(z)=0.19x( ) xln( )
,
. . .
(z)=0.19x( ) xln( )=0.823
. .
(z) =1.0
=35m/s
( ) = . =0.231
( )
.
( ) =[1+7(0.231)]x x1.25x(0.823x1.0x30)2=997.1N/m2
( ) =0.997KN/m2