Anchorage in naturally corroded specimens taken from existing structures
Paper i proceeding, 2012
In an on-going project, the anchorage capacity of naturally corroded steel reinforcement was
investigated experimentally. The beam specimens were taken from edge beams of Stallbacka Bridge in Sweden.
The specimens showed different extent of corrosion induced damage; from no sign of corrosion to extensive
cracking and spalling of the concrete cover. After consideration of different possible test setups, a four
point bending test indirectly supported with suspension hangers was chosen. The beams were strengthened
with transverse reinforcement around the suspension hangers to avoid a premature failure. Eight successful
tests have been carried out so far; in all these, a diagonal shear crack preceded an anchorage failure. The anchorage
behaviour was examined through monitoring the applied load, free-end slip and mid-span deflection.
The test results can be used to extend our knowledge concerning the structural behaviour of corroded reinforced
concrete structures to field conditions.