二方向X形配筋柱の耐震性能

概要

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To improve the seismic characteristic of reinforced concrete columns failing in shear, the authors proposed the uniaxial diagonal reinforcement, in which longitudinal reinforcing bars are placed in uniaxial diagonal direction. For the open frame, however, the columns need to improve the seismic performance to two directions. The biaxial diagonally reinforced columns, in which longitudinal reinforcing bars are placed in the directions of diagonal lines of the section, were composed by applying the method of uniaxial diagonally reinforced columns. Test of three specimens, conventional parallel reinforced column, uniaxial diagonally reinforced column and biaxial diagonally reinforced column, is conducted. As the result of test, it is proved that the biaxial diagonally reinforced column is almost the same strength and energy dissipation as the uniaxial diagonally reinforced column and is more ductile than one. The ultimate shear strength of biaxial diagonally reinforced column can be estimated by applying a modified and extended cumulative strengh theory proposed by the authors.
一般社団法人日本建築学会の論文