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运用ANSYS软件对折线偏心布束和直线偏心布束的两类复合受力预应力混凝土梁徐变挠度进行分析,获取了折线布束引起的剪力对弯剪压复合受力梁徐变挠度的影响规律及其机理,指出了折线布束预应力梁的徐变挠度系数较直线布束偏心梁小.探讨了剪力值、梁跨高比、徐变系数模式等因素对折线偏心布束梁徐变挠度的影响规律,结果表明,跨高比对该类梁徐变挠度增量影响较大,剪力值对徐变挠度增量影响明显,而徐变系数值变化对折线布束引起的徐变挠度增量影响不大.该结论可为折线配束预应力混凝土先张梁的徐变变形预控提供参考.
Using the software of ANSYS, the creep deflection of two types of composite prestressed concrete beams with eccentric bending and straight eccentric bending are analyzed, and the creep deflection The paper points out that the coefficient of creep deflection of prestressed beam with broken line is smaller than that of eccentric beam with straight line.The effect of shear stress, The results show that the effect of span-height ratio on the incremental creep deformation of this kind of beam is large, and the influence of shear force on the creep deformation increment is obvious. However, This conclusion can provide reference for the pre-control of creep deformation of the pre-tensioned beam of prestressed concrete beam with prestressing line.