| 摘要 |
The BUNDCOL system, which the most longitudinal bars be placed in the corner of the quadrangular reinforced concrete column as bundled bars, could increase the curve capacity of Pn-Mn column interaction in both uniaxial and biaxial bending. By this system, the distance between each bar (LA-1X, LA-1Y and LA-2Y) will be maximum and effective toward both the x- and y- axes. With BUNDCOL forms, a direct and exact spread-sheet calculation with interlaced formulas, with the computer can shorten the calculation process of trial & error cubic equation, and omit the conservative or unconservative criteria for biaxial bending formerly. This system can reduce the quantity and/or the dimension of the material, means the reduction of the cost. The other advantage is the availability of the wider space. By the same calculation principle, this system can be applied in structural wall (shear wall or special wall-like column).
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