Structural Timber Design (eBook)

Werner Seim is a professor for Timber Engineering and Building Preservation 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 KIT (Karlsruhe Institute for Technology) and conducted postdoctoral studies 1998 at the UCSD (University of California, San Diego). His research is focussed on bracing systems for high-rise buildings, timber-concrete-composites and assessment 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. As an engineer he received in 2006 a timber construction prize awarded by the state of Baden-Württemberg.

Werner Seim ist Professor für Holzbau und Bauwerkserhaltung an der Universität Kassel, Deutschland, und Ingenieur mit mehr als 35 Jahren Erfahrung im Bereich des Holzbaus und der Bauwerkserhaltung. Er studierte Bauingenieurwesen an der Universität Stuttgart, promovierte 1994 am KIT (Karlsruher Institut für Technologie) und absolvierte 1998 ein Postdoc-Studium an der UCSD (University of California, San Diego). Seine Forschungsschwerpunkte sind Aussteifungssysteme für Hochhäuser, der Holz-Beton-Verbund sowie die Bewertung und Wiederverwendung von Tragelementen. Er ist Mitglied in mehreren nationalen und internationalen wissenschaftlichen Ausschüssen. Er wurde als Gastprofessor an die UBC Vancouver, die EPF Lausanne und das FCBA Bordeaux eingeladen. Sein Engagement in der Lehre wurde 2020 vom Land Hessen mit einem Preis für exzellente Lehre gewürdigt. Als Ingenieur erhielt er im Jahr 2006 den Holzbaupreis des Landes Baden-Württemberg.

PREFACE
LIST OF ABBREVIATIONS
1 TIMBER AS A STRUCTURAL MATERIAL
1.1 Building with timber - advantages and challenges
1.2 Mechanical properties of solid timber
1.2.1 Influence of the fibre direction
1.2.2 Strength values of solid timber
1.2.3 Deformation properties of solid timber
1.2.4 Influence of load duration and humidity
1.3 Wood based products
1.3.1 Solid structural timber and glued solid timber
1.3.2 Glued laminated timber
1.3.3 Cross laminated timber
1.4 Wood based materials
1.4.1 Laminated veneer lumber
1.4.2 Plywood
1.4.3 OSB
1.4.4 Particle boards
1.4.5 Fibreboards
2 STRUCTURAL DESIGN OF BEAM-TYPE MEMBERS
2.1 Basics of structural design
2.1.1 Action combinations
2.1.2 Modification factors and deformations factors
2.2 Bending
2.3 Shear
2.4 Torsion and rolling shear
2.5 Buckling
2.5.1 Lateral bending buckling - kc method
2.5.2 Lateral torsional buckling - km method
2.5.3 Torsional flexural buckling
2.5.4 Calculation according to Second Order Theory
2.6 Tension and bending
2.7 Serviceability limit state
2.7.1 Deformations
2.7.2 Vibrations
3 STRESSES PERPENDICULAR TO THE GRAIN
3.1 Introduction
3.2 Compression
3.2.1 Compression perpendicular to the grain
3.2.2 Compression stresses at an angle to the grain
3.3 Tension perpendicular to grain
3.3.1 General
3.3.2 Notches
3.3.3 Tension loaded connections perpendicular to grain
3.3.4 Holes in glulam beams
4 DOWEL-TYPE CONNECTIONS
4.1 General
4.2 Connections with dowel-type fasteners
4.2.1 Overview
4.2.2 Deformation behaviour
4.2.3 Basics of the calculation of shear loaded connections
4.2.4 Shear loaded timber-timber connections
4.2.5 Shear loaded timber-timber connections - simplified calculation
4.2.6 Shear loaded steel-timber connections
4.2.7 Shear loaded steel-timber connections - simplified calculation
4.3 Dowels and Bolts
4.4 Nails and staples
4.4.1 Definitions
4.4.2 Construction rules for connections with nails
4.4.3 Construction rules for staples
4.4.4 Load bearing capacity
4.5 Connections with screws
4.5.1 General
4.5.2 Conceptual design of screwed connections
4.5.3 Load bearing capacity
4.5.4 Application examples and execution
4.6 Block shear
4.7 Reinforcement of doweled connections
4.8 Connections with Cross-laminated timber (CLT)
5 OTHER TYPES OF CONNECTIONS
5.1 Shear connectors
5.1.1 Mechanism
5.1.2 Connector types and construction rules
5.1.3 Load bearing capacity
5.2 Carpentry joints
5.2.1 Introduction
5.2.2 Halving joints
5.2.3 Step joints
5.2.4 Mortise and tenon
5.2.5 Wooden nails
5.2.6 Deformations - slip moduli
5.3 Hinged and moment resistant connections
5.3.1 Structural detailing and calculation modelling
5.3.2 Principle of intersection
5.3.3 Rules for detailing
5.4 Adhesive bonded connections
5.4.1 Introduction
5.4.2 Adhesive bonding of structural elements
5.4.3 Connections, local reinforcement and repair
5.5 Reinforcement against tension forces perpendicular to the grain
5.5.1 Notches
5.5.2 Connections perpendicular to grain
5.5.3 Openings
6 STRUCTURAL ELEMENTS - BEAM TYPE MEMBERS
6.1 Glulam beams
6.1.1 Bending stresses
6.1.2 Tension stresses perpendicular to the grain
6.2 Trusses
6.3 Composite elements
6.3.1 Beams, slab and roof elements
6.3.2 Timber-concrete composites (TCC)
6.3.3 Columns
6.4 Bracing - Design and detailing
6.4.1 Introduction
6.4.2 Roof structures
6.4.3 Beams and columns
6.5 Modelling of beam type elements
7 STRUCTURAL ELEMENTS - PLANE
7.1 Light frame elements
7.1.1 Introduction
7.1.2 Wall elements
7.1.3 Slab elements - diaphragms
7.1.4 Connections and anchoring
7.2 Cross laminated timber (CLT)
7.2.1 Production, load bearing characteristics, and strength
7.2.2 Plates
7.2.3 Wall panels
7.2.4 Detailing and load transfer
7.3 Modelling of plane elements
7.3.1 CLT plates
7.3.2 Shear walls
7.4 Interaction of diaphragms and bracing walls
8 DYNAMIC BEHAVIOUR OF TIMBER STRUCTURES
8.1 Dynamics and vibration
8.1.1 Structures under dynamic impact
8.1.2 Natural frequencies of simple systems
8.2 Vibration of slabs
8.3 Structures under earthquake impact