In this paper ninety-eight reinforced concrete pile caps. each with four piles, were tested under vertical load. The variables involved were spacing of piles, arrangement of reinforcement, side length of column. side length of pile cap and depth of pile caps For all pile caps final failure was in shear. In the shear failure three typical forms were recorded. The first was the punching fai lure by the column punching through the pile cap. The second was the one similar to that in a wide beam, with the pile cap splitting into halves which were dis-placed vertically relative to one another. The third was the shearing failure in which the corners of pile cap were broken off. In regard to the ultimate shearing strength the results of the test were compared with the values calcuated according to the provision for the shear in A. I. J. Building Code Requirements for Reinforced Concrete(1982), to that in A. C. I. Building Code Requirements for Reinforced Concrete(ACI 318-83), to the equations proposed by others and to that by authors. To conclude the discussions the calculated values according to the author's equations and to the provision for the punching shear in A. I. J. Building Code agreed well with the experimental results.
鉛直荷重を受ける4本くい支持独立フーチングのせん断耐力に関する実験的研究
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