Km

E 2p

.mean. fin ■ Nd EAc.tot a 1p,c.0.d — 2.93 N/mm2

E 1mean.fin,Nd

Design compression strength about the critical z-z axis:

Buckling resistance condition for each element (5.3.1 (EC5, 6.3.2)) Member 1: Plywood

Relative slenderness about the Yrei z 1 = —— • / —¡i— Yrei z 1 = 1. 77

z-z axis, Arel . z,1 ' * VE^ ■ 05 (equation 8.11; EC5, equation (6.21))

The relative slenderness ratio is greater than 0.3, hence conditions in EC5,6.3.2(3) apply:

Factor jjc - using the solid timber value jc = 0 . 2 (equation (5.6); EC5, equation (6.29))

Instability factor, ku = 0 . 5 ■ [l + j ■ (A.rel.z,i - 0. 3) + yT2el.u]

Instability factor, kc.z,1 kc.z,1 =

(equation (5.4a); EC5, equation (6.25)) kz^ + JkZt 12 - A;reLzj1

Strength of element 1 kc.z,1 • f 1p,c 0 d = 4.05 N/mm2

Member 2: Timber

Relative slenderness about the Yrel z 2 = —— • J-— Yrel z 2 = 1 . 59

The relative slenderness ratio is greater than 0.3, hence conditions in 5.3.1 (EC5,6.3.2(3)) apply:

Instability factor, kZ2 kz,2 = 0.5 • [1 + Pc • (XreLz.2 - 0.3) + Yrd^J

0 0

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