| It’s more than one hundred year since the practial application of reinforced concretestructure. Damages as aging of exsit structures are inevitable. Futhermore, earthquakes andother disasters make researches on strengthening after damages the focuses of attention ofresearchers. Method of Setion Enlargement is one of the most practical strengthening methodsin rehabilitation.According to the experience in practical strengthening constrution, this paper proposed arevised design of Method of Section Enlargement. Shear strengthen after rehabilitation ofsimply supported beams was analized and researshed. The finite element analysis of DamagedRC beams after strengthening was performed by ANSYS software. As shown in the results,Method of Setion Enlargement can significantly improve the ultimate shear strengthen.The spacing for vertical stirrups and the damage degree have important impact on shearstrengthen after rehabiliation. This paper selected two spacings of vertical stirrups(100mm,150mm) and two pre-damage degrees(80%,0%). By tests, this paper concluded shearstrengthen of damaged RC beams after strengthening and proposed suggestions for futureconstruction of rehablition.Finally, the nonlinear simulation of the test beams was finished by the use of the largegeneral-purpose finite element software ANSYS. And some results about strengthen byMethod of Section Enlargment considering new and old concrete interface behavior wereproposed in this paper including changes of stress after strengthening. This paper can bereference to further improve Design code for strengthening concrete structure and possiblefuther construction. |
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