Mechanics of Materials and Timber Structures (5 cr)

Objective

On completion of the course, the student can:
• identify axial stress
• identify shear stress
• identify bending stress
• describe deformations
• repeat displacement
• repeat dimensioning of beams and columns
• explain the buckling of a compressed member
• explain the design of a compressed member.
On completion of the course the student is expected to at least be able to assess the time and moisture dependent functioning of a timber structure, explain the fire technical design of a timber structure, list main uses and applications of timber structures, determine the ULS load combinations for a structure and based on it design a simple timber member subjected to bending and/or axial force and design a nailed joint.

Content

Basic assumptions of the theory and mechanical properties of materials
Elastic and plastic behaviour
Hooke's law
Stress and strain distribution under axial loading
Stress and deformations under bending
Dimensioning of beams and columns
Euler's formulas for slender columns
Deformations: axial, shear, bending, temperature
Basics of torsion
Timber as a construction material
Time dependent properties of timber
Moisture technical functioning of timber
Design of a timber beam when subjected to bending and/or axial force
Design of a nailed joint
Principles of fire technical design of timber

Evaluation scale

0-5

Assessment criteria, satisfactory (1)

The student can
- identify axial stress
- identify shear stress
- identify bending stress and describe deformations
- repeat displacement
- explain dimensioning of beams and columns
- describe the buckling of a compressed member
- explain the dimensioning of a compressed member
- list most common uses of timber structures as well as timber products and structural solutions
- estimate the time and moisture related behaviour of timber
- explain the anisotropic properties of timber and the way they influence dimensioning
- describe the fire technical behaviour of timber structures.

Assessment criteria, good (3)

In addition to the previous criteria the student is able to
- determine axial stress
- determine shear stress
- determine bending stress and deformations
- explain deformations
- define displacement
- calculate the buckling of a compressed member
- design a compressed member
- define the load combination in ultimate limit state
- design a timber beam subjected to bending and/or axial force.

Assessment criteria, excellent (5)

In addition to the previous criteria the student can
- apply axial stress
- apply shear stress
- determine bending stress and deformations
- explain deformations
- define displacement
- solve and apply trusses
- discuss displacement
- implement dimensioning of beams and columns
- design a simple nailed joint
- assess the fire resistance of a timber member by using calculations in simple cases.

Assessment criteria, approved/failed

The student can
- identify axial stress
- identify shear stress
- identify bending stress and describe deformations
- repeat displacement
- explain dimensioning of beams and columns
- describe the buckling of a compressed member
- explain the dimensioning of a compressed member
- list most common uses of timber structures as well as timber products and structural solutions
- estimate the time and moisture related behaviour of timber
- explain the anisotropic properties of timber and the way they influence dimensioning
- describe the fire technical behaviour of timber structures.

Qualifications

Basici of Statics