Previously, there were only a few data regarding the structural performance of the column members constructed using the precast shell-form method, especially when subjected to high axial loading. To investigate the matter mentioned above, eight column specimens, which were approximately one-third scale models of actual columns in a 30 story RC structure, were prepared. Five column specimens were constructed using the precast concrete shell and were designed for flexural, shear and bond splitting failure types. The other three column specimens were constructed using the conventional monolithic method and were compared with the PCa column specimens. The horizontal cyclic loading tests on these specimens were carried out under high axial load with ratios (N/N_u) of 0.3, or from -0.7 to 0.6, where N is axial load and N_u is ultimate axial strength of column considering the effect of main reinforcement. An investigation on the structural performance of PCa column members as compared to that of the conventional RC column members was performed. Moreover, the calculation methods used in the determination of the elastic rigidity and the ultimate strength of PCa column members under high axial load were also investigated.
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