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IBRACON Structures and Materials Journal • 2012 • vol. 5 • nº 4
Post-strengthening of reinforced concrete beams with prestressed CFRP strips
Part 2: Analysis under cyclic loading
beams were tested: one of them was tested under static loading
(VFC_PE_01) and two were tested under cyclic loading (VFC_
PC_01 and VFC_PC_02). A complete description about the con-
crete beams, the post-strengthening and the anchorage system
used may be found at the first part of this paper.
Table [01] describes the experimental program.
Stress levels applied at beam VFC_PC_01 were 50% and 80% of the
yielding stress observed at beamVFC_PE_01, tested under static load-
ing. Stress levels applied at beam VFC_PC_02 were more reasonable,
50% and 60% of the yielding stress observed at beam VFC_PE_01.
3.2 Test procedure
The experimental program was developed at EMPA – Switzer-
land. Loading was applied according to a six point bending test
scheme: simple supported beam and four vertical loads, spaced by
12000mm, symmetrically applied along the 6000mm span.
Load was applied by two 100kN hydraulic jacks. During the tests,
values of deflection at mid-span and specific strain at steel, concrete
and FRP were continuously recorded by a computer controlled data
acquisition system. Bending test setup is shown in Figure [02].
4. Results and discussion
4.1 Results of beam VFC_PC_01
Beam VFC_PC_01 was submitted to stress levels of 50% and 80%
Figure 2 – Bending test setup
Figure 3 – Beam VFC_PC_01 after failure