Design moments MEdz about z axis

M2 = 146.1 kNm from analysis eiNEd = effect of imperfections where

= 146.1 + (2965 / 400) x 1836 > 0.02 x 1836 = 146.1 + 13.6 > 36.7

= equivalent 1st order moment at about 2 axis at about mid height may

<5.8.8.2(3)> <5.8.8. 3> <Exp. (5.34)>

e0 = 20 mm be taken as M0e2 where

M2 = nominal 2nd order moment = NEde2

where m

where

= (2.08 - 0.83) / (2.08 - 0.40) = 1.25 / 1.68 = 0.74 = 1 + PPf

P = 0.35 + (fck / 200) - (A / 150) = 0.35 + 30 / 200 - 29.3 / 150 = 0.35 + 0.15 - 0.195 = 0.305

= effective creep coefficient

where Pp

0Eqp

: final creep coefficient : from Figure 3.1 for inside conditions h = 350 mm, C30/37, t0 = 15 : 2.4

: 1st order moment due to quasi permanent loads

fyd = 500 / 1.15 = 434.8 MPa Es = 200000 MPa d = effective depth

= 350 - 35 - 8 - 16 = 291 mm = 0.74 x 1.51 x 434.8 / (200000 x 0.45 x 291) = 0.0000186 = 2965 mm as before = (1 / r) 0 / 10 = 0.0000186 x 29652 / 10 = 16.3 mm

max[M0:

With reference to Exp. (5.13N), pef may be taken as equal to 2.0. However, for the purpose of illustration the full derivation is shown here.

Greener Homes for You

Greener Homes for You

Get All The Support And Guidance You Need To Be A Success At Living Green. This Book Is One Of The Most Valuable Resources In The World When It Comes To Great Tips on Buying, Designing and Building an Eco-friendly Home.

Get My Free Ebook


Post a comment