The given above information allows us to outline the future research development trends. The part of them is rather fundamental, such as perfection of the concrete Pseudoplasticity Theory and the concrete Fracture Mechanics. Development of the strength theory of the RC bars and bar system under general action case of internal forces including the torsional moment has the same character. The latter theory can be a generalization of the OSTRCE, mentioned above.
A more specific problems are outlined below:
• The strength design of the eccentrically tensile RCE on the basis of Extreme Strength Criterion (ESC)
• The strength design on the basis of Plasticity Theory and Fracture Mechanics: the reinforcement anchorage, the splitting of concrete near prestressed elements ends, the crushing of concrete under anchorage devices.
• The determination of the minimum longitudinal and transverse reinforcement on the basis of concrete Plasticity Theory and Fracture Mechanics.
• The design of the cracking load and crack propagation length for the normal (cross) and inclined cracks on the basis of concrete Plasticity Theory and Fracture Mechanics.
• The design of the crack opening width for normal and inclined cracks on the basis of concrete Plasticity Theory and Fracture Mechanics theses.
• The deflections design of the RCS with cracks on the basis of the concrete Plasticity Theory and Fracture Mechanics theses.
• Justification by means of design of some constructive rules and demands.