| With the development of society and the state requirements for the construction industry,for example, some buildings which not reached their design life, there have been someproblems in their using. Rebuilding is not economical and cannot meet the requirements ofthe state construction industry. So taking the appropriate method for the damaged building isparticularly important. Using the fiber reinforced composites reinforced the building hasbecome a trend in the industry, and has been widely used in civil engineering. A lot ofexperimental research of reinforcing the building has been done in recent years. Butexperimental research on damaged building is less, so techniques are flawed in order to get amore complete reinforcement.In this paper, two methods are taken to reinforce seven damaged beams for shearperformance. One method is using basalt fiber reinforced composites, the other is using basaltfiber reinforced bar. The experimental studies show that using basalt fiber reinforcedcomposites and basalt fiber reinforced bar for reinforcing the damaged beams are obviouseffective. And their deformation and shear capacity are all improved after reinforcement. Thefailure modes and factors affecting reinforcement are also analyzed. Failure modes arebending failure, shearing failure and debonding failure. Factors that affect the reinforcementeffect are the pasting way of basalt fiber-reinforced composites, the specimens’ span ratio,concrete strength and other factors. Based on the test results, the theoretical mode andtheoretical calculation are given for the damaged beams reinforced with FRP. The calculatedvalues are in agreement with experimental values.In order to study the mechanical properties of damaged beams reinforced with basaltfiber reinforced composites, element software are used to simulate the loading process forreinforcing the damaged concrete beams by basalt fiber reinforced composites. The shearcapacity and strain are in agreement with the experimental conclusion. |
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