To stabilize the rotation of a pin support, and to reduce force working to a foundation.
In a pin-support foundation structure, a superstructure A is supported on the foundation P by using upper shoes 1 and lower shoes 4 with irregular fitting spherical surfaces 1a and 4a. The shoes 1 are formed in a projecting truncated cone shape and intermediate-removed from their bases, the intermediate-removing sections S are also formed in the truncated cone shape thinned towards front ends and one lower shoe 4 is formed in a recessed shape. The direction of a transmission is kept constant towards the central section of the front ends through side wall sections 1b regarding the sections S in external force applied to the shoes, a stress is received by the central sections of the spherical surfaces 1a and supports easy to conduct a rotation are obtained. Axial force to the shoes is stabilized when the shoes 1 are fixed to the lower section of a column 5 for the superstructure A, and a stress distribution is equalized and a stress transmission is smoothed when the sectional areas of the side wall sections 1b are equalized extensively over the height direction. When the column 5 is formed in a hollow pipy shape and the whole periphery of the end face of the column 5 is joined with the whole peripheries of the sections S, the stress transmission is further smoothed, and the rotations of the supports are stabilized.
MASUDA TSURASHI
MATSUI CHIAKI
KONO AKIO
TEI SHINAN
IS KK
MATSUO CONSTRUCTION CO LTD
HAKUYO KOGYO KK
Higashio Masahiro
Torii Kazuhisa