圆形构件钢筋布置有两种形式 :一种是由相互垂直的径向直钢筋组成 ,钢筋长度为变长 ,各组钢筋按圆的弦长计算而得 ,如图1所示 ,构件直径较小时采用 ;另一种是由向心直钢筋与环筋组成 ,直钢筋可能有多种长度 ,在相同根数范围内其间距向内变小 ,环筋无论是直径还是周长 ,均按等差级数变化 ,如图2所示 ,构件直径较大时采用。圆形构件向心钢筋如采用放足尺大样配料 ,既费时又要有足够的场地 ,还很难达到准确的要求 ,鉴于此 ,宜采用计算的方法配料 There are two forms of circular member reinforcement arrangement: one is composed of mutually perpendicular radial straight reinforcing bars, the length of the reinforcing bars is variable, and the reinforcing bars of each group are calculated according to the circular chord length. As shown in FIG. 1, Hour; the other is composed of centripetal straight steel bars and ring bars, straight bars may have a variety of lengths, the spacing in the same number of roots within the narrowing, the ring bars, whether diameter or perimeter, are equal The difference between the number of changes, shown in Figure 2, the larger components used when the diameter. If the circular member centripetal reinforcement large enough to put full-scale ingredients, both time-consuming and have enough space, it is difficult to achieve accurate requirements, in view of this, should adopt the method of calculating ingredients