軸力と水平力を受ける高強度PC杭の力学的性状に関する実験 : 高強度PC杭の耐力変形性能向上に関する研究(1)

概要

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The objective of this study is to develope the improving method for the bearing capacity and deformability of PHC piles. In part 1, the experiments of the currently used PHC piles were carried out, in order to investigate the seismic behavior. As the results, it was found that the currently used PHC piles have less deformability and that the deformability could not be improved, even though the value of parameters of PHC pile was varied. Therefore, the condition of the a seismic design of PHC piles would be limited within a extremely small deflection range. And the necessity to improve the bearing capacity and deformability of PHC piles was reconfirmed. Then, a definite method was investigated. That is, it was analytically proved that the brittle failure, even under the limit magnitude of axial load, could be avoided, if the hollow part of PHC pile would be filled with concrete and furthermore, the core concrete would be confined by the plenty of spiral hoop. The experiments of PHC pile whose hollow part is filled with concrete and the analytical approach will be made in part 2.
1987-06-30