Course content

Material description, elasticity, fracture and fracture criteria for anisotropic materials. Stress and strain in laminates and composites. Behavior of anisotropic plates and shells.
Joining based on glue, transversely loaded dowels and axially loaded rods. Flexibility of connections. Wood based composites, solid wood, glued laminated timber, cross-laminated timber, cross-ply and compositions of those. Design rules for composite structures. Stress peaks (hot spots) around holes in beams and plates and reinforcements.
Long time properties, moisture and shape distortions, creep and relaxation. Pre-stressed components.
Dynamic loading, vibrations and fatigue.
Fire and design of timber structures.

Learning outcome

Timber Structures 1 gives a basic introduction to design of timber structures and is a prerequisite for Timber Structures 2. Timber Structures 2 deals with the more advanced topics related to the design and calculations of timber structures. The theoretical foundation for modeling of wood and timber structures by use of the finite element method will be established. The aim is to understand the structural behavior of composite structures made out of anisotropic plates and shells, as well as to compute the structural response. Joining techniques with respect to their capacity and stiffness will be studied. Furthermore, analytical methods together with design rules will be studied for composite structures or special structural details. Time dependent effects and fire design are also be included.

Knowledge:
The students shall have knowledge about:
- Numerical modeling of wood and wood-based materials for use in load-carrying structures
- Joining techniques for wood-based materials and their properties
- Time-dependent effects important for design of wooden components
- Response of timber structures exposed to dynamic loading
- Fire design

Skills:
The students shall be able to:
- evaluate and propose effective use of wood-based components for use in load-carrying structures
- model and compute the structural response to loading by use of numerical simulations and analytical methods
- verify that all requirements to structural design are fulfilled with respect to European design rules (Eurocode 5 parts 1-1, 1-2 and -2)

General competence:
The students shall master:
- general basis of load and load calculations
- general static analysis and calculation of load effects
- general basis of structural design according to European rules

Learning methods and activities

Lectures, demonstrations and exercises. 2/3 of the assignments must be approved prior to the examination. The lectures and exercises are in English when students who do not speak Norwegian take the course. If the teaching is given in English the Examination papers will be given in English only. Students are free to choose Norwegian or English for written assessments.

Compulsory assignments

• Øvinger

Required previous knowledge

Basis in statics and mechanics and TKT 4211 Timber Structures 1, or similar.

Course materials

Thelanderson & Larsen: Timber Engineering, ISBN 0-470-844469-8.
Daniel & Ishai: Engineering Mechanics of Composite Materials, 2.ed, ISBN 0-19-515097-1.
Bodig & Jayne: Mechanics of Wood and Wood Composites, ISBN 0-89464-777-6.
STEP: Timber Engineering 1, ISBN 90-5645-001-8
Eurocode 5, EN 1995-1, Design of timber structures parts -1-1,-1-2, -2
Papers and notes specified during the semester.