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Course title Building Structures III (Timber)
Course code BūvZ3095
Credit points 2
ECTS creditpoints 3
Total Hours in Course 32
Number of hours for lectures 16
Number of hours for seminars and practical classes 8
Number of hours for laboratory classes 8
Date of course confirmation 16/04/2014
Responsible Unit Department of Structural Engineering
 
Course developers
Mg. sc. ing., vieslekt. Aivars Brokāns

Prior knowledge
BūvZ2042, Structural Mechanics I
BūvZ2043, Structural Mechanics II
BūvZ2047, Building Materials
Course abstract
In the basic level of the course the strength and stiffness properties of wood materials are explored, the behaviour models of structural timber elements under loads are considered, and types of joints and fasteners including capacity models and design principles as well. During tutorials and laboratory works the students master their skills for applying of theoretical background for design: to select the material, section type, to check the strength and stiffness conditions of elements, to perform the experimental tests, to calculate the capacity and proceed with design of connections.
Learning outcomes and their assessment
• knowledge and understanding on: mechanical properties of wood materials and factors affecting, about assuming of appropriate design model for calculation of bearing capacity and displacements, and on theory based and empirical methods for calculation of connections. Attendance of lectures, Laboratory works and practical works.
• skills: 1) to perform the calculation and design of structural timber elements and joints according limit states method and applying Eurocode 5 methodology. Practical works. • competencies: to demonstrate an ability to use the knowledge and skills for good choice of type of bearing structure (girder, truss, portalframe, arch or some space structure) regarding acting loads and service conditions. Exam.
Course plan
1.Wood materials. History of timber structures. Development trends.
2.Characteristic and design values of strength and stiffness properties of timber materials: resistance, modulus of elasticity, modification and safety factors.
3.Limit state design. Ultimate limit state (ULS) and serviceability limit state (SLS).
4.Design of the full cross-section timber elements according to strength and stability conditions of Eurocode 5.
5.Timber elements in enclosure structure of building (rafters, purlins, lathing).
6.Types of timber joints and behaviour under load. Requirements for connections.
7.Moisture-resistant adhesives and glued joints.
8.Dowel type connections.
9.Timber connectors. Split ring and shear plate connector joints.
10.Joints with punched metal plates.
11.Mechanically jointed beams.
12.Beam type trusses. Timber trusses with nailed joints, bolted joints and toothed-plate connector joints.
13.Polygonal and segment type trusses of glue laminated timber.
14.Full cross-section and grid timber frames and arches.
15.Spatial fixing of plane timber frames. Bracing systems. 16.Constructive and chemical measures for the protection of timber against decay, fire and borers.
Requirements for awarding credit points
Attendance of the course activities – at least 80% of total volume.
Laboratory tasks are carried out and passed. Exam is passed (1 calculation task and 1 theoretical question)
Description of the organization and tasks of students’ independent work
Practical works: design of structural timber beam according to strength and stability conditions of Eurocode 5. Laboratory works: 4-point bending test of timber beam.
Criteria for Evaluating Learning Outcomes
Credits will be enrolled if the student is able to prove his/her knowledge and competence during constructive conversation about behaviour of elements and joints under static load (according checklist).
Compulsory reading
1.Ozola L. Koka būvkonstrukciju aplēse un konstruēšana I. Jelgava: LLU, 2008.- 259 lpp.
2.Ozola L. Koka būvkonstrukciju aplēse un konstruēšana II. Jelgava: LLU, 2011. 208 lpp.
3.Ozola L. Koka būvkonstrukciju elementi. Jelgava: LLU, 2006. 184 lpp.
4.Larsen H., Enjily V. Practical design of timber structures to Eurocode 5. London: Thomas Telford, 2009. 268 p. 5.Porteous Jack. Structural timber design to Eurocode 5/ Jack Porteous and Abdy Kermani. Chichester, West Sussex, UK: John Wiley & Sons Inc., 2013. 624 p.
Further reading
1. Timber construction manual. T. Herzog ... [et al.]. Basel [etc.]: Birkhäuser; 2004.
2. Manual for the design of timber building structures to Eurocode 5 / The Institution of Structural Engineers, TRADA. - London : Institution of Structural Engineers, 2007, 258 lpp.; + 1 CD-ROM. 3. Praxishandbuch Ingenieurholzbau. Grundlagen, Bemessung, Konstruktion / Kai Schild, Stefan Völkner. Fraunhofer IRB Verlag, 2005.- 245 S.
Periodicals and other sources
1.Žurnāls The Structural Engineer. London: The institution of structural engineers. ISSN 1466-5123
2.Žurnāls Bauen mit Holz. ISSN: 0005-6545 3.Žurnāls Būvinženieris: Latvijas Būvinženieru savienības izdevums. Rīga: Latvijas Būvinženieru savienība. ISSN 1691-9262.
Notes
Compulsory Course for the First level professional higher educational study programme "Civil Engineering" of the Faculty of Environment and Civil Engineering in the 5th semester