PRESTRESSED RE-BAR REINFORCEMENT IN PRESTRESSED CONCRETE BEAMS (V 154)

VORGESPANNTE SCHUBBEWEHRUNG IN SPANNBETONTRAEGERN (V 154)

THERE ARE NO DATA AVAILABLE ON THE DESIGN OF PRESTRESSED RE-BAR REINFORCEMENT (SHEAR NEEDLES). EXISTING RESULTS OF TESTS ARE INSUFFICIENT FOR THE DERIVATION OF DESIGN RULES. THEREFORE THE SUPPORTING ACTION OF A PRESTRESSED RE-BAR REINFORCEMENT IS TO BE EXAMINED SYSTEMATICALLY BY MEANS OF TESTS ON BEAMS. THE FOLLOWING INVESTIGATIONS ARE TO BE CARRIED OUT WITH A VIEW TO DRAWING UP REALISTIC DESIGN RULES FOR PRESTRESSED RE-BAR REINFORCEMENT: PART A - STUDY OF THE LITERATURE AND DESIGN OF TWO EXPERIMENTAL BEAMS; PART B - TESTING OF TWO EXPERIMENTAL BEAMS, EVALUATION OF THE RESULTS OF THE MEASUREMENTS, AND DERIVATION OF DESIGN RULES.