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9.1 前言在通常的钢筋混凝土结构中,扭转对结构的影响比弯曲和剪切的影响为小,故在结构设计中,大多被忽略了。即,当扭矩很小,扭转的影响在弯曲和剪切设计时已包含在所用的安全度内,所以抗扭设计可以省略。但是,桥梁中的曲线梁或格子梁,建筑结构中支承大跨度构件的壁梁或支承悬出较大的阳台的壁梁等都有很大的扭转作用,在设计中不容忽视。
9.1 Preface In the usual reinforced concrete structures, the effect of torsion on the structure is smaller than the effect of bending and shearing, so most of the structural design is ignored. That is, the torsional design can be omitted when the torque is small and the effect of torsion is included in the degree of safety used in bending and shearing designs. However, the curved beam or lattice beam in the bridge, the wall beam supporting the long-span member in the building structure or the wall beam supporting the larger suspended balcony have great torsion effects and can not be neglected in the design.