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• W2733316013 abstract "The objective of this study is to examine the concrete filled effect in the hollow part of SC pile in order to improve the deformation performance of pile. In the pile foundation structure, the improvement is prompted, assuming secondary seismic design. But, Study on the deformation capacity of precast concrete pile is not sufficiently advanced. The bending tests of plie are carried out on a daily basis for performance assessment. The purposes of the test is the confirmation of the flexural strength. Therefore, the test data accumulation is not enough to discuss the deformation performance of pile. This study focuses on the SC pile in precast concrete pile. The SC pile is a cylindrically shaped member manufactured by centrifugal casting with concrete placed in the hollow section of a steel pipe. The SC pile is a composite pile that utilizes the merits of concrete with good resistance against compressive forces and steel shell with good resistance to tensile forces. Concrete prevents local buckling of the steel pipe, while the steel pipe constrains concrete; therefore, the SC pile has excellent flexural bearing capacity and deformation capacity. This study examined effects of some parameters for deformation performance of the SC pile by the simple beam bending test. Four parameters are set for the test. The parameters are 1) Loading method, 2) Steel pipe thickness, 3) Axial force, 4) Infilled material. We observed the failure conditions, relations between the load and the displacement, and relations between the bending moment and the curvature. The knowledge obtained from this study are shown below. 1) Reinforced by infilling the hollow part of the pile with material, the following effects can be expected: prevention of depression of the steel pipe, prevention of flaking or crush of the pile body concrete, and improvement of the bending deformation performance of the pile. It is more effective to use infilled material with high Compressive strength and high Elastic modulus. 2) The results of bending tests of piles, maximum flexural strength and maximum curvature, are influenced by loading method. The results obtained by the one-way cyclic loading are greater than those obtained by the peak-to-peak alternate cyclic loading. Test value obtained by the one-way cyclic loading is on dangerous side as the evaluation of the deformation performance of the pile. Therefore, it is desirable to adopt the peak-to-peak alternate cyclic loading for appropriate evaluation of the deformation performance of the pile. 3) It is effective to increase the thickness of the steel pipe for the improvement of the flexural strength of the pile. But, it is not effective to increase the thickness of the steel pipe for the improvement of the deformation performance of the pile. 4) With respect to the maximum value of curvature, the test value of the standard specimens is not more than the analysis value. The test value of the test specimen that was reinforced with soil cement is about equivalent to the analysis value. The test value of the test specimen that was reinforced with concrete is greater than or equal to the analysis value." @default.
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• W2733316013 date "2017-01-01" @default.
• W2733316013 modified "2023-10-12" @default.
• W2733316013 title "単純梁方式曲げ試験によるSC杭の中空部に中詰めした効果の検討" @default.
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• W2733316013 doi "https://doi.org/10.3130/aijs.82.823" @default.
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