Static Behavior of a Plank Girder Strengthening by Pre-Stressed Rubber Pads
Keywords:
Plank Girder, Rubber, StrengtheningAbstract
This paper aims to investigate the behavior of a plank girder strengthen by pre-stressed rubber pads. There are two test schemes. For the first scheme, the capability of the rubber pad in improving bending moment capacity of the plank has been investigated. In the strengthened specimen, the rubber pad will be attached along the longitudinal axis of the plank and tested under static load in order that the moment capacity could be compared to the controlled specimen. For the second scheme, in the controlled specimen, two planks were placed adjacently and filled up with non-shrink mortar. Then, the load was eccentrically applied, and the test will be terminated when the cracks were observed between the planks. The rubber pad was then attached laterally across the joint and test under the same procedure. For the first scheme, the test results revealed that the first crack was observed at 5 mm and 7 mm for the controlled specimen and strengthened specimen respectively. The strengthening method using rubber pad found to a promising method in improving the flexural capacity of beam. For the second scheme, the crack along the joint was found when the load reached 5.92 ton at the deflection around 6 mm for the controlled specimen. In contrast, the plank strengthening with rubber pad could withstand the load up to 7.606 ton (at deflection around 10 mm) without any cracks along the joint.
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