Abstract
A series of tests on the behaviour of FRP-confined concrete stub columns under long-term sustained loading, in addition to providing further tests on the static ultimate strength of the composite columns are performed. The main parameters varied in the tests are: (1) the level of long-term sustained load level, and (2) FRP ratio. After observing the measured data of the axial strain due to long-term sustained load effects in the current tests, it was found that after about 130 days, the process tends to stabilize. Generally, creep effects reduce the ultimate axial strain of the FRP-confined concrete stub columns, while the ultimate strength is not significantly altered. The current tests show that, in general, the current ACI 209R-92 (1992) slightly overestimates the long-term strain of the FRP-confined concrete stub columns.
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