钢筋砼框架弹塑性分析及其延性设计

The Elastic-Plastic Analyses and Ductile design of R. C. Frame

在新近颁布的《建筑抗震设计规范》(GBJ11—89)中,强调了建筑抗震设计中“概念设计”的重便要性。但在实际结构设计中,还缺乏比较简便而有足够精度的计算方法。本文针对钢筋砼框架结构弹塑性阶段受力特性的分析,得出了梁端相对弯矩值的分布特征,从而使梁端设计弯矩的选定合理化。实际算例表明,按此方法,可使钢筋砼框架结构的延性得到充分地发挥。

In 'The Building Code of Anti-Seismic Design' (GBJ11-89), the importance of conceptual design have been emphasized on the building anti-seismic design. In the practice, however, enough simple and precise methods have not been supplied to meet the needs for building engineers. Based on the elastic. plastic analyses of R. C. frames, the author investigated the influence on internal frame force with the change of cross sections of beams and columns, found out the character of moment distribution of beam ends, and suggested a reasonable distrihution of design moment of beam ends. It is shown by calculation that the ductility of R. C. frame can be fully developed under the limit load according to this method.