Structural Timber Design -  Werner Seim

Structural Timber Design (eBook)

(Autor)

eBook Download: EPUB
2024 | 1. Auflage
416 Seiten
Ernst & Sohn (Verlag)
978-3-433-61157-9 (ISBN)
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Structural Timber Design

Timber construction has been one of the most innovative areas of the building industry for several years. The speed with which new products are introduced into practical application is almost breathtaking compared to the other construction materials in the building industry. As a result, timber construction is continuously increasing its market share in commercial buildings and hall structures, and even in multi-storey construction for residential and office buildings.

This book provides essential knowledge and skills required for the design, detailing, and construction of timber structures. Special emphasis is placed on the specific features of timber and wood-based materials compared to other construction materials. This concerns the numerous advantages, as e.g. the comparatively low weight, the good workability of the high-performance material and the large variety of assembling technologies, but also the challenges resulting from the material anisotropy and from the susceptibility to natural pests.

In each chapter the essential phenomena are explained first and then brought into connection with code regulations. This aims to support the basic understanding of the interrelations and dependencies in timber engineering, which is the fundamental basis of creative engineering.

Werner Seim is a professor for Timber Engineering and Building Rehabilitation at the University of Kassel, Germany, and also an engineer with more than 35 years of experience in design and assessment of timber structures. He holds a Civil Engineering Degree from the University of Stuttgart, received his PhD in 1994 at the Karlsruhe Institute for Technology KIT and conducted postdoctoral studies 1998 at the University of California UCSD, San Diego. His research is focussed on bracing systems for high-rise buildings, timber-concrete-composites and re-use of structures. He is member of several national and international scientific committees. He was invited as a Visiting Professor to UBC Vancouver, EPF Lausanne and FCBA Bordeaux. His commitment to teaching was rewarded in 2020 with the Hessian State Prize.

Symbols and Abbreviations


Latin Upper-case Letters


A Section area, knottiness
AC Action combination
Aef Effective contact area, effective cross section (steel rod or rebar)
Ak Characteristic exceptional action
Anet,t, Anet,v Net area against tension and shear failure
B Bending stiffness, B = E·I
C Minimum stiffness of bracing elements
Ecm Mean modulus of elasticity for concrete
Emean, E05 Mean modulus of elasticity, 5% fractile of modulus of elasticity
Ed Effects of action, design value
Ed,fi Effects of action, design values in case of fire
Ek Effects of action, characteristic value
(EI)ef Effective stiffness of a composite beam
F Force
F90,Rd Capacity against tension perpendicular to the grain
Fax,Rk Characteristic axial tensile resistance of a single fastener
Fbs,Rk Characteristic capacity against block shear
Fv,w,Rd Design resistance of light frame wall element against horizontal loading
Fc,0,d Design compression force parallel to the grain
Ftens,k Characteristic tension capacity of a screw
Ft,90,d Design tensile force at the crack plane
Fv,Ed Design force applied to the connection; design horizontal force applied to the head of a wall
Fv,Rk Characteristic lateral resistance per shear plane of a single fastener
ΔFv,Rk Characteristic rope effect contribution to the lateral resistance per shear plane of a single fastener
Fv,α,Rd Design resistance for shear connector units
Fv,α,Rdb Design resistance of the bolt in a connection with shear plates
Fv,α,Rdc Design resistance of the shear plate
Gmean, G05 Mean shear modulus, 5% fractile of shear modulus
Gk Characteristic self-weight
Gmean Mean shear modulus
GR,mean Mean rolling shear modulus
(GA)ef,xz Effective shear stiffness for out-of-plane-loaded CLT panels
(GA)ef,xy Effective shear stiffness for in-plane-loaded CLT panels
H Altitude above sea level
I Torsional moment of inertia
Ip Polar moment of inertia
Iy, Iz Moment of inertia related to bending around y-axis and z-axis
Ief,x, Ief,y Effective moment of inertia for CLT sections related to stresses in the direction of x-axis and y-axis
Kser, Ku Slip modulus, stiffness of translational spring
Kϕ Stiffness of a rotational spring
LDC Load duration class
LVL Laminated veneer lumber
M Bending moment, shear centre
Map,d Design bending moment at the apex of a double-tapered beam
Md Design bending moment
MD Torsional moment
Ms Bending moment at the centre of a group of connectors
Mtor Torsional moment
My,Rk Characteristic yield moment of a fastener
Nd Design normal force
Ns Normal force at the centre of a group of connectors
OSB Oriented strand board
PGA Peak ground acceleration
Qk Characteristic transient action
Qk,L Characteristic action, life load
Qk,S Characteristic action, snow
Qk,W Characteristic action, wind
Rd Resistance, design value
Rk Resistance, characteristic value
S Centroid, soil amplification factor
Sap,R Maximum spectral acceleration
Se, Sd Spectral acceleration, elastic and design value
Sy Static moment related to bending around the y-axis
T Torsional stiffness, period
ULS Ultimate limit state
V Volume
Vd Design shear force
Vle, Vre Shear force at the left and right side resp. of the support
Vred Reduced shear force at the support area
Vs Shear force at the centre of a group of connectors
Vz Shear force in the z-direction
Wy, Wz Section modulus related to bending around y-axis and z-axis
Wap,netto Section modulus at the apex of a double-tapered beam, if necessary, considering a weakened cross section
Wnet Section modulus of weakened cross section
Wres Section modulus of residual cross section above or below an opening

Latin Lower-case Letters


a Length of rectangular opening or diameter of round opening, acceleration
a1, a2 Spacing parallel and perpendicular to the grain, coefficients for the calculation of the buckling length, protrusion at the contact area
a3,c, a3,t Unloaded and loaded end distance parallel to the grain
a4,c, a4,t Unloaded and loaded end distance perpendicular to the grain
afi Additional dimensions to reach a certain fire resistance for connections
ar Distance of ribs, width of a group of connectors
b Section width of a member, width of the contact area, length of a wall element
bfi Section width after fire exposure
bnet Net distance between studs of light frame element
bw Width of the web of a beam
c Reduction factor for slender walls, damping constant
d Diameter of a fastener
dc Diameter of a shear connector
def Charring depth
dh Diameter of the head or the washer
di Diameter of knot i
dn Diameter of a nail’s head
dr Diameter of a glued-in rod
d0 Zero strength layer for members under fire exposure
f Natural frequency
fax,k Characteristic withdrawal strength parameter
fc,0,d Design compression strength parallel to the...

Erscheint lt. Verlag 5.4.2024
Sprache englisch
Themenwelt Technik Bauwesen
ISBN-10 3-433-61157-2 / 3433611572
ISBN-13 978-3-433-61157-9 / 9783433611579
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