Behavior of Reinforced Concrete Structures with External Strengthening of Columns
Keywords:
Fiber reinforced polymer, Reinforced concrete, Pushover analysisAbstract
This paper presents a study on dynamic properties and comparison of structural behavior of reinforced concrete buildings strengthened by fiber-reinforced polymer (FRP) jacketing and by reinforced concrete (RC) jacketing. The structures were evaluated according to additional earthquake and analyzed by the pushover analysis. The result indicated that the strengthened structures could resist more lateral load and had higher ductility. The dynamic properties of the FRP-strengthened structures, as well as distribution of the bending moments and the shear forces, did not show any difference from its original structure. Besides higher strength and ductility, higher structural stiffness was also obtained in the RC-strengthened structure. The significant enlargement of the column sections was a cause to change in dynamic properties of the original structure and redistribution of the bending moments and the shear forces, also affecting the other structural members besides the strengthened ones.
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