混凝土框架梁控制截面设计弯矩的研究

Research on the Design Moment in Control Section of Reinforced Concrete Frame Beams

混凝土框架梁端的实际控制截面位于梁、柱界面处,而不是与梁端相连的柱的轴线处,所以结构模型中所有框架梁的刚接端均应设刚域,使框架梁的计算跨度更合理,使梁端的控制截面与计算截面相一致,使设计能根据梁柱界面处的组合弯矩确定梁端截面配筋。本文对此进行了分析研究,结果可供结构设计参考。

In design of concrete frame structures, the actual control section of a beam end is located at the interface of the beam end with an adjacent column, not at the position of column axis. So in the analysis model of frame structures, the rigid region should be set on all rigid ends of the beam, as a result the more reasonable calculation span of frame beam can be used for structure analysis to make the control section consistent with the calculation section of the beam. Furthermore, the reinforcement of the beam ends can be determined by the combined moment at the interface section of the beam and the column. In this paper, based on the theoretical analysis in detail, some useful results are deduced for reference to civil engineers.