抄録
The object of this study is to investigate the mechanical properties of partially prestressed concrete circular columns with circular spiral confining reinforcement by experimental and analytical works, in which the columns were subjected to scores of high intensity reversed cyclic lateral load and constant axial load. In this paper, the experimental work and a part of experimental results, such as failure process and deflection behavior are described. From the experimental results, main concluding remarks are induced as follows : (1) To evaluate the ductile behavior of columns subjected to cyclic load like seismic attack, it is necessary to consider the deterioration of the ductility resulting from the effect of cyclic loading. (2) The deformation behavior of columns is markedly improved by circular spiral reinforcment which effectively confines the conerete in compression zone. (3) The hysteretic characteristics of columns can be controlled by the value of coefficient of prestressing.
