LV EN RU DE FR

Reinforced Materials and Structures

Course developer

Prior knowledge

BūvZ4137, Reinforced Concrete and Masonry Structures

Course abstract

In the course the basics of reinforcement of materials, types of reinforcement, and methods of reinforcing are covered. Students will gain knowledge and skills to perform the ultimate and serviceability limit state verifications for brittle materials (mostly concrete) reinforced with steel or non-metallic reinforcement, short steel fibres, or prestressed strands.

Learning outcomes and their assessment

Knowledge about behaviour of reinforced materials, main reinforcing methods, and reinforcement materials. The acquired knowledge is evaluated in oral exam.
Skills to perform the section analysis of structural concrete elements depending on the type and material of the reinforcement, and the reinforcing method.
The skills are estimated during the semester by the results presented in seminars and laboratory works.
Competences to define the problem for the section analysis of reinforced structures, choose the method of analysis, and evaluate the results critically. The competences are evaluated in the oral exam, where student’s ability to apply his knowledge in unusual situations is considered.

Course Content(Calendar)

1. Lectures: Reinforced materials, types of reinforcement and mechanical behaviour. Types of steel reinforcement, its advantages and disadvantages. Geometrical and mechanical properties. Section analysis of concrete elements under flexure reinforced in multiple layers. (3h)
Seminars: Analysis of the optimal amount and position of steel reinforcement in concrete elements under bending with or without axial force. (3h)
Laboratory work: Numerical analysis of reinforced concrete beams using nonlinear analysis software. (3h)
2. Lectures: Types of non-metallic reinforcement, advantages and disadvantages. Geometrical and mechanical properties. Section analysis of concrete beams reinforced with non-metallic reinforcement. (3h)
Seminars: Evaluation of efficiency of non-metallic reinforcement in different concrete structures. (3h)
Laboratory work: Numerical analysis of concrete beams reinforced with non-metallic reinforcement using nonlinear analysis software. (3h)
3. Lectures: Concrete reinforced with short fibres. Types, materials, and mechanical properties of fibres. Behaviour of steel fibre reinforced concrete (SFRC) members in tension and bending. Application of SFRC in load bearing structures. Determination of the material properties of SFRC and application in section analysis of SFRC members. Effect of the steel fibres on concrete members considered in different limit state verifications. (3h)
Seminars: Evaluation of the efficiency of steel fibre reinforcement in concrete and reinforced concrete members. (3h)
Laboratory work: Numerical analysis of SFRC members in bending using nonlinear analysis software. (3h)
4. Lectures: Prestressed reinforcement. Methods of prestressing and the corresponding behaviour of the prestressed members. Change of the prestress in time. Calculations of the prestress losses. Section analysis of prestressed members subjected to bending and axial forces. (3h)
Seminars: The choice of the prestressing method and the necessary limit state verifications depending on the type of structure. (3h)
Laboratory work: Numerical analysis of prestressed concrete members in bending using nonlinear analysis software. (3h)

Requirements for awarding credit points

Student must 1) present the topics assigned by course instructor and participate in the discussion of the presentations in the seminars, 2) complete all the assigned laboratory works and discus the results with the instructor and 3) pass the oral exam about the topics included in the course.

Description of the organization and tasks of students’ independent work

Student prepares topics assigned by the course instructor, presents it and participates in the discussion of the topic with the instructor and other students.
The laboratory works are performed based on the task given by the instructor. The computer software of the Department of Structural Engineering or of students own can be used to do the calculations. The results of the work are discussed with the instructor.

Criteria for Evaluating Learning Outcomes

The activities in seminars are evaluated based on the quality of the presentation and the ability to formulate one’s arguments.
The laboratory works are evaluated based on the student’s ability to interpret and discuss the results of the numerical analysis.
The course is completed by an oral exam. The ability to discuss about the topics given in the exam is evaluated.

Compulsory reading

1) Model code 2010 : first complete draft, Lausanne: International Federation for Structural Concrete (fib), 2010. 2 sēj.
2) Maidl, Bernhard R. Steel fibre reinforced concrete. Berlin : Ernst & Sohn, 1995. 292 p.
3) O'Brien E., Dixon A., Sheils E. Reinforced and Prestressed Concrete Design to EC2: the complete process, London: Spon Press, 2012. 524 lpp.
4) Kett, Irving. Engineered concrete : mix design and test methods. CRC Press, 2000. 170 lpp.

Further reading

1) Brauns J. Stiegrota betona konstrukcijas: Eirokodekss EC2 konstrukciju projektēšanā. Jelgava: LLU, 2007. 173 lpp.
2) Bhatt, Prabhakara, Prestressed concrete design to eurocodes, London, New York : Spon Press, 2011. 596 lpp.
3) Naaman, Antoine E., Prestressed concrete analysis and design :fundamentals, Ann Arbor, MI : Techno Press 3000, 2012. 1176 lpp.

Periodicals and other sources

1) Structural Concrete. Journal of the fib, Thomas Telford Ltd.John Wiley & Sons, Inc. ISSN 1464-4177 (print). ISSN: 1751-7648 (online)
2) ACI Structural Journal. American Concrete Institute. ISSN 08893241
3) Engineering Structures. Elsevier. ISSN 0141-0296.

Notes

Compulsory Course in research direction for the Professional Master's study programme “Civil Engineering”