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目前在高层框架结构设计中,为了便于计算,框架梁纵向配筋一般都按单筋梁计算、配筋,忽略了受压钢筋的作用。但在抗震设计中,框架梁(尤其梁端)受压钢筋较多,忽略受压钢筋作用是不太妥当的。它不仪会使梁的用钢量加大,而且由于按单筋梁计算、配筋使梁的正截面强度提高(只有当砼受压区高度 x<两倍受压钢筋合力点至受压边缘的
At present, in the design of high-rise frame structures, for the sake of calculation, the longitudinal reinforcement of frame beams is generally calculated and reinforced according to single reinforcement beams, ignoring the effect of pressed steel bars. However, in the seismic design, the frame beam (especially the beam end) has more compressive steel bars, and it is not appropriate to ignore the effect of the pressed steel bar. It will not only increase the amount of steel used for the beam, but also increase the normal section strength of the beam due to calculation of single reinforcement and reinforcement (only when the compression zone is x< twice the compression point of the reinforcement to compression. Marginal