Document Archives

Fatigue Test on Damaged Prestressed Concrete Beams

• ID:

  910

• ESCSI:

  4324.011

• Author:

  Abeles, P.W. and F.W. Barton

• Publication Name:

  RILEM International Symposium

• Type of Publication:

• Publisher:

  Dept. of Civil Engineering, Duke Universitgy

• Dated:

  1966

• Issue/Volume:

  September 15-17

• Other ID:

• Page(s):

  i,ii and 1-12

• Reference List:

  Y

• Abstract:

  Two prestressed lightweight concrete beams containing tensioned and non-tensioned strands were loaded to static failure and subsequently subjected to fatigue loading in the damaged state.In the static tests, loading was applied in three cycles, with the peak load in each cycle being successively increased until maximum load was reached during the third cycle. Failure occurred when the steel began to yield slightly and the compressive zone appeared to crush. At this point, the load was immediately removed and complete failure was avoided. Thus, it was possible to obtain almost complete recovery with only slight or no visible damage in the compressive zone.
  Results from these tests indicate that the performance of the damaged beams under fatigue loading was, in principle, similar to that of the first static tests, except for a great reduction in the effective prestress with a relatively slight increase in set and deflection.