BEARING CAPACITY OF PRECAST, STRESSED DEFLECTION BEAMS WITH CEMENT MORTAR JOINTS

TRAGVERHALTEN VON AUS FERTIGTEILEN ZUSAMMENGESPANNTEN BIEGEGLIEDERN MIT ZEMENTMOERTELFUGE

A KNOWLEDGE OF THE EFFECT OF JOINTS ON THE FORMATION OF DEFLECTION AND SHEAR CRACKS AND OF THE EXTENT TO WHICH COMPRESSION FORCES IN THE SHEAR ZONE CAN BE TRANSMITTED VIA THE JOINTS IS NECESSARY FOR THE EVALUATION OF THE BEARING CAPACITY OF SEGMENTED DEFLECTION BEAMS. CEMENT MORTAR JOINTS ARE AN ALTERNATIVE TO CONVENTIONAL EPOXY RESIN MORTAR JOINTS, BECAUSE THE CEMENT MORTAR IS CHARACTERIZED BY INSENSITIVITY TO HIGH TEMPERATURES AND FIRE. EFFORTS WERE MADE TO ANSWER QUESTIONS ABOUT ITS BEARING CAPACITY BY MEANS OF COMPRESSION TESTS ON CONCRETE PRISMS PROVIDED WITH CEMENT MORTAR JOINTS AND BY MEANS OF A LOADING TEST ON A 9 M LONG SEGMENTED GIRDER HAVING CEMENT MORTAR JOINTS.