Course code BūvZ2043
Credit points 3
Total Hours in Course81
Number of hours for lectures16
Number of hours for seminars and practical classes16
Independent study hours49
Date of course confirmation10.03.2021
Responsible UnitInstitute of Civil Engineering and Wood Processing
Dr. sc. ing.
BūvZ2042, Structural Mechanics I
Fizi2009, Physics
Mate1031, Mathematics I
The study course continues the course Structural Mechanics I. The conditions of geometric stability of bar systems. Multi-span beam analysis. Internal forces in trusses. Influence lines method. Modelling and analysis of frames. The dimensioning of beam, truss and frame element sections according to the limit states method.
1. Student is able to design the stable statically determinate trusses and frames and to analise the sectional forces and stresses – tests Nr 1 and 2.
2. Student is able to reasonable substantiate the calculation model choice and results credibility on the basis of the knowledge gained,- tests Nr 1 and 2 and homeworks
1. Displacements of rigid body on plane and in space. Degrees of freedom.(2hr)
2. Structure of bar systems. Geometric stability of system.(2hr)
3. Analytical conditions of geometric stability of system.(1hr)
4. Modelling of determinate multi span beams, checking for geometric instability. Calculation of support reactions and internal forces.(3hr)
5. Internal forces in the sections of multi-span beam.(2hr)
6. Influence lines method. Influence lines of support reactions of multi span beam. Determination of internal forces. (2hr)
7. Determination of unfavourable loading of beam using influence lines.(2hr)
8. Structure types of statically determinate trusses.(1hr)
9. Analysis of member forces in trusses by means of joint equlibrium method.(2hr)
10. Analysis of member forces in trusses by means of section method.(3 hr)
11. Influence lines method for trusses. (1 hr)
12. Determination unfavourable loading of truss by means of influence lines.(3 hr)
13. Joint types in system: truss joints and frame joints.(2 hr)
14. Frames and their supports: beam type frames and frames with horizontal reaction.(1 hr)
15. Frame analysis and internal forces. (13 hr)
16. Dimensioning of beam, truss- and frame systems according to Ultimate Limit State conditions.(2hr)
Credit test will be enrolled, if student know basic definitions of static, and he/she is able to discuss on results of calculations, to justify methods chosen and to prove the static equilibrium of internal and external forces.
It is required positive assessment of tests.
1st homework. Calculation of support reactions, internal forces in sections, draft of force diagramms.
2nd homework. Calculation of support reactions and internal forces in members of hinged truss. Use of influence lines to determinate unfavourable loading.
Student will have positive assessment of test, if at least 50% of calculation records are correct.
The home work will be assessed basing on two criteria: 1) fulfilment of equilibrium conditions between internal and external forces and correct force diagramms; 2) ability to participate in conversation on calculations and results.
Bulavs F., Radiņš I. Būvmehānikas ievadkurss. Rīga: RTU izdevniecība, 2010. 250 lpp. 2. Melderis I., Teters G. Būvmehānika: mācību grāmata. Rīga: Zvaigzne, 1977. 560 lpp. 3. Siliņš L. Būvstatika: mācību grāmata. Rīga: Zvaigzne, 1976. 232 lpp.
1. Hulse R., Cain J.A. Structural mechanics: worked examples. Basingstoke: Palgrave Macmillan, 2009. 2. Stavridis L. T. Structural systems: behaviour and design. London: Thomas Telford, 2010. 2 sēj. 3. McKenzie W.M.C. Examples in structural analysis. 2nd edition. Boca Raton, FL: CRC Press, 2017. 819 p.
1. Būvmehānika - palīglīdzeklis studentiem [tiešsaiste], [skatīts 10.04.2018.]. Pieejams: www.llu.lv/buvmehanika 2. Būvinženieris: Latvijas Būvinženieru savienības izdevums. Rīga: Latvijas Būvinženieru savienība, 2006- ISSN 1691-9262
Compulsory Course for the First level professional higher educational programme “Civil Engineering”