| Summary: | The loss due to collapsing structure includes not only materials but may
also take lives. In the case of structure function changing that may cause
increasing loads, it is required to put efforts in strengthening the structure
elements in order to increase the capacity and hence to avoid the possibility of
collapsing.
The objective of this research was to study the behavior of T-sectional
reinforced concrete beam strengthened in the negative moment region by wire
rope and mortar composite. The test was carried out to three T-sectional beams:
without wire rope reinforcement (BK), with 2 wire rope reinforcements (BP1),
and with 4 wire rope (BP2) reinforcements. The type of wire rope was
Independent Wire Rope Core (IWRC) with 10 mm diameter. The testing method
used was two points static loading with flens positions below (the flens part
experienced tensile stress).
Results showed that the maximum load carrying capacity of BP1 and BP2
specimens increased by ratios of 1.59 and 2.03 to the BK specimen respectively.
However, the increase was achieved after the development and propagation of
high cracking. Ductility of BP1 and BP2 specimens decreased by ratios of 0.62
and 0.36 to the BK specimen respectively. The initial stiffness of BP1 and BP2
increased by ratios of 1.09 and 1.08 to the BK specimen respective. The effective
stiffness of BP1 and BP2 specimens decreased by respective ratios of 0.88 and
0.92 to the BK specimen. Stress occurred in the wire rope based on the analysis
results of Response-2000 and the layer method have not reached 50% of the
ultimate stress resulted from the preliminary tess. In general, unless improvement
was given to the stiffness characteristics of the wire rope, its contribution would
not become optimum.
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