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Title |
Experimental Study on the Retrofit Method to Improve the Structural Capacity of Reinforced Concrete Shear Wall
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Keywords |
강판부착 ; 반복하중 ; 단면증설 ; 휨성능 ; 철근콘크리트 전단벽 ; 보강방법 Adding plate ; Cyclic load ; Enlarging section ; Flexural capacity ; RC shear wall ; Retrofit method |
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Abstract |
Four RC shear wall specimens with a/d of 2.2 are designed. And a flexural retrofitting is performed for one specimen by both enlarging wall section and adding additional vertical reinforcements. Also the effectivity of jaketting wall sides is evaluated for the two methods using only steel plate or welded wire mesh with enlargement of section. Cyclic loads are applied to the retrofitted specimens according to the loading history proposed by ACI under constant axial force. Test result showed that the strength and ductility of specimen were improved where the section was enlarged after the installation of additional vertical reinforcements. Confining the ends of wall by U shape W.W.F. with enlargement of section showed most excellent structural capacity regarding to the strength and ductility. Retrofitting by using steel plate was much effective not only to protect the abrupt decrease of strength after yield but also to improve the deformation capacity.
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