ABSTRACT
This paper experimentally investigated the shear behavior of corroded post-tensioned prestressed concrete beams with full grouting. The effects of insufficient grouting on the shear behavior of post-tensioned concrete beams are also addressed. Eight beams with full and insufficient grouting were fabricated, six of which were subjected to accelerated corrosion and the remaining two served as control uncorroded beams. All beams were tested to failure in four-point loading. Experimental data on shear cracking, load-deflection response, shear strength, failure mode were presented. Results showed that strand corrosion accelerated the formation of critical crack. Insufficient grouting delayed shear cracking. Strand corrosion degraded the post-cracking stiffness and shear strength regardless of grouting quality. The shear strength of corroded beams with corrosion loss of 31.7% deceased by 15.44% as compared to that of the uncorroded beam. Strand corrosion loss less than 31.7% did not change the shear compression failure mode in fully grouted beams. The failure modes of locally ungrouted beams changed from shear compression failure to strand rupture as the corrosion loss exceeded 39.6%.
