FUNDAMENTAL MECHANISMS OF LOAD TRANSFER ALONG REINFORCED CONCRETE INTERFACES UNDER MONOTONIC AND CYCLIC ACTIONS
Abstract
THE BEHAVIOUR OF REINFORCED CONCRETE STRUCTURES (ESPECIALLY WHEN THEY ARE SUBJECTED TO EARTHQUAKES) IS STRONGLY INFLUENCED BY THE BEHAVIOUR OF INTERFACES ATSOME CRITICAL REGIONS. SUCH INTERFACES ARE VERY OFTEN FORMED IN REINFORCED CONCRETE ELEMENTS: FLEXURAL-SHEAR CRACKS IN BEAMS, EXPANSION JOINTS IN PAVEMENTS, INTERFACE BETWEEN OLD AND NEW CONCRETE IN COLUMNS REPAIRED BY MEANS OF JACKETS, INTERFACES WITHIN PRECAST ELEMENTS' CONNECTIONS, ETC. IT IS THEREFORE VERYIMPORTANT TO STUDY THE BEHAVIOUR OF THE SHEAR TRANSFER MECHANISMS, SO AS TO MAKE POSSIBLE THE RATIONAL DESIGN OF R.C. ELEMENTS, ESPECIALLY UNDER CYCLIC SHEAR (EARTHQUAKE). WITHIN THE PRESENT WORK, THE BEHAVIOUR OF THE DOWEL ACTION OF BARS CROSSING AN INTERFACE, AS WELL AS THE CONCRETE-TO-CONCRETE FRICTION ALONG AN INTERFACE IS STUDIED. THE RESEARCH IS FOCUSED MAINLY ON THE BEHAVIOUR OFTHE MECHANISMS UNDER CYCLIC IMPOSED DEFORMATIONS. IN ADDITION, THE INTERACTION BETWEEN DOWEL ACTION AND PULLOUT OF THE BAR IS INVEST ...
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