Advanced Analysis in Concrete Structures

Lecturer:

Tutor:

Supervisor:

Department of Concrete and Masonry Structures

Synopsis:

thin walls structures analysis, folded

plates theory, shear lag, long-term behaviour of concrete

Requirements:

Syllabus of lectures:

1. Main features of thin-walled structures. Pure torsion and warping torsion.

2. Cross-sectional characteristics of open and closed thin-walled members.

Thin-walled beams with rigid and deformable cross-section. Harmonic analysis.

3. Folded plate theory. Membrane and slab actions. Formation of the element stiffness matrix.

4. Analysis of various types of folded plate structures. Folded plate analysis of tall buildings. Computer program.

5. Shear lag in wide flanges - main features and methods of analysis.

6. Deformation process of concrete. Long-term behaviour of concrete structures. Experimental findings. Behaviour of concrete under increasing stress; components of strain. Time dependent effects.

7. Factors influencing creep and shrinkage of concrete. Main features and effects of creep and shrinkage of concrete. Increase of deflections and redistribution of intemal forces. Structures changing structural system and second order effects.

8. Time development of the humidity and temperature distributions in concrete members. Environmental conditions and analysis of temperature and humidity transfer. Nonuniformity and time development of temperature and humidity distributions. Strain softening. Stress analysis.

9. Creep and shrinkage prediction models. Calculation of strain from a known stress history. Direct integration and methods of time-discretization. Analysis of stress variation with known strain history; relaxation.

10. Creep and shrinkage analysis of structures. Structural analysis of statically determinate and indeterminate structures, homogeneous and non-homogeneous, changing structural system. Methods of structural analysis. Redistribution of intemal forces.

11. Stress variation in concrete structures subjected to support settlements. Stress distribution in box girders. Creep analysis of high-rise buildings. Creep buckling.

12. Excessive deflections of prestressed concrete bridges.

13. Findings from experimental investigations. Measurements of stress and deflection developments. Comparison of experimental results with theoretical predictions.

14. Statistical variability of material creep parameters and enviromnental factors. Uncertainty of creep predictions. Variability of stresses and deformations. Conclusions and practical recommendations.

Syllabus of tutorials:

Study Objective:

Study materials:

1. Practical design of structural concrete, fip Recommendation, 1999

2. Šmerda Z., Křístek V.: Creep and Shrinkage of Concrete Elements and Structures. Elsevier 1988

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans: