In structure of reinforced concrete, strength is decreased by problem of materials and construction failure. For bring used day, structure is injured by overload and vibration, and require countermeasure because of crack and extreme strain.
At this p...
In structure of reinforced concrete, strength is decreased by problem of materials and construction failure. For bring used day, structure is injured by overload and vibration, and require countermeasure because of crack and extreme strain.
At this point, in column, which can injury structure. confined by steel plate. according to quantity of reinforcement and ratio of depth-thickness. investigate relation of countermeasure efficient and strength and study strength and ductility of column confined by steel plate.
Throughout this experimental study. we analyzed strength of specimens. dtraon and ductility with section area of steel plate. ratio of volume, ratio of depth-thickness for that result.
1) There is little difference in increasing of maximum strength between 80mm specimen and 100mm in the width. If the width of steel plate were over 80mm. the efficiency for increasing of load is decreased.
2) The quantity of reinforcement and ratio of width-thickness are not proportion to ratio of strength. Therefore and maximum efficiency is showed at the barch of c-2 300㎤ and the batch of c-4 550㎤. If the width of the steel plate of reinforcement were over 80mm. the efficiency for ratio strength is decreased.