一、吊车梁的外荷弯矩图钢筋混凝土折线形吊车梁的形式见图1。在优化设计中,须知道吊车梁的外荷弯矩图。对此问题,作者已于文献〔1〕中做过分析,直接引用即行。但对于折线形吊车梁,本文将坐标原点位于折线拐点处(图1),因此计算公式稍有改变。 First, the external load bending moment diagram of the crane beam The form of the reinforced concrete crane beam is shown in Figure 1. In the optimization design, the load bending moment diagram of the crane beam must be known. For this question, the author has already done an analysis in [1] and direct quotes. However, for the zigzag crane beam, the origin of the coordinate is located at the inflection point of the polyline (Figure 1), so the calculation formula has changed slightly.