Design of timber structures

Description

Design of timber structures Volume 2 Preface Contents Introduction 5 General concepts 5 Material properties 7 Bending 21 Axial loading 22 Cross section subjected to shear 25 Cross section subjected to combined stresses 26 Members with varying cross section or curved shape 28 Serviceability limit states, SLS 32 Connections with metal fasteners 36 Wall diaphragms 49 Bracing 51 Introduction General concepts 2.1 Load duration classes 2.3 Load combination factors y Material properties 3.1 Design value for strength 3.1 in the ultimate limit states, ULS 3.2 /M 3.2 Strength modification factor kmod kh =min 600 Y’1 h 1,1 /300 V I, h } 1,2 kt = min- 3000 Y/2 3.4 Material properties for standardized wood products 3.4.1 Structural timber 3.4.2 Glued laminated timber (glulam) 3.4.3 Laminated veneer lumber (LVL) 3.4.4 Fibreboards 3.4.5 Particleboards 3.4.6 Oriented strand boards (OSB) 3.4.7 Plywood 3.5 Final modulus of elasticity Bending MRd = /m,d-WArit £crit = ll,56 -0,754^ for 4^0,75 for 0,75 ]^+ 2 + ^-1 4 4MvRk 2 + ^--1 l,1572MyjRk/hAkrf + ^ k) 2,3^My>Rk/hAkJ + ^ 10.4 Nailed connections 10.4.1 Laterally loaded nails M DV =^-180rf2’6 600 M = -^-270d2’6 yRk 600 10.4.2 Requirements for spacing, distance and penetration depth 10.4.3 Axially loaded nails /^ = 20-10-6pk2 [N/mm2] X_ = 7°',0'X [N/mm2] 10.4.4 Combined lateral and axial loading £1 10.5 Bolted and dowelled connections h,a,k k90 sin2 a + cos2 a [N/mm2] /^ = 0,082(1-0,01d)pk [N/mm2] l,35 + 0,015fe0 = A/2 11.2 Simplified analysis method B Bracing 12.1 Single members in compression X 12.2 Bracing of beam or truss systems Symbols Non-liability Copyright Publications and websites from Swedish Wood Publications