Abstract
Flexural reinforcement on wood beams is intended to increase the maximum load capacity that can be supported by wood beams until they are collapse. One of the most widely used resilient reinforcements currently used is reinforcement using Carbon Fiber Reinforced Polymer (CFRP) which is a combination of high strength with light weight material. This reinforcement is intended for historical buildings that need more load capacity that can be supported due to changes in building function, or the increase of the load on the building. The purpose of this research is to know the effect of reinforcement of wood beams with CFRP and variation of length of reinforcement to flexible strength of wood beams, and beam behavior reinforced with CFRP due to loading. Structural beam testing using mahogany logs with cross sectional size 75x100mm2 along 2 m consisting of 4 types of samples with each type consists of 2 pieces of sample. The first sample was a wood beams without reinforcement, the second sample was a wood beams with a reinforcing length of ¼ spans in the middle, a third sample was a wood beams with a reinforcing length ¾ spans in the middle, and a fourth sample was a wood beams with retrofitting along the length of the span. From the test it is found that the maximum load increase that can be supported by the sample with the length of reinforcement ¼ span, ¾ span, and along the span has increased the maximum load respectively that is 4.393%, 37.340%, and 48.323% compared to wood beams without reinforcement. The average damage occurring in samples with CFRP is debonding failure.
Highlights
Wood as a construction material has long been used by the Indonesia people
It can be seen from the historical buildings, adat houses, and the other traditional buildings in Indonesia where the majority of building materials are made of wood[1]
In order to cope with these problems, it is necessary to have accurate wood strength materials which do not change the shape of the building construction, but at the same time they can improve the strength of the wood beams so that they will be effective, practical, and eficient[3]
Summary
Wood as a construction material has long been used by the Indonesia people It can be seen from the historical buildings, adat houses, and the other traditional buildings in Indonesia where the majority of building materials are made of wood[1]. Old historical buildings which use wood as building materials should be reviewed their structural strength because of the decrease in the wood strength and the building change of function without the change in their original shape[2]. Carbon fiber has the capacity to bear high temperatureand has the moisture characteristic (the characteristic of maintaining its condition). It constitutes a composite material which contains binding and reinforcing. Reinforcement provides strength and inflexibility, while binding keeps strength in the fixed position.This carbon fibercan be found in Carbon Fiber Reinforced Polymer (CFRP)[5].CFRP is a composite material which has light physical nature and the other advantages such as its tensile strength higher than reinforcement steel sheets of 2,800 MPa, it can endure corrosion because it is made of non-metallic material, its elastic modulation is close to steel, and it is flexible it can become inflexible when it is given epoxy[6]
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