钢筋混凝土结构的截面强度计算,早已采用符合截面实际破坏状况的塑性法,但超静定钢筋混凝土结构的内力分析,除梁、板外,国内、外至今仍普遍地采用弹性法,这不仅与截面的强度计算有矛盾,更重要的是不能正确地反映结构的内力在受荷过程中的实际分布状况;当结构的设计内力是由多种荷载的组合所控制时(如厂房铰结排架),则不能充分发挥结构的潜力,浪费材料。本文在分析等高厂房铰结排架按弹性计算的基础上,考虑因塑性变形而产生的内力重分配,试图用弯矩调幅法对其进行塑性分析。按本 The calculation of the cross-sectional strength of reinforced concrete structures has long been based on the plasticity method that meets the actual failure conditions of cross-sections. However, in addition to beams and plates, the analysis of internal forces in statically indeterminate reinforced concrete structures is still widely used at home and abroad. There are contradictions in the calculation of the strength of the section, and what is more important is that it cannot correctly reflect the actual distribution of the internal forces of the structure in the loaded process; when the internal force of the design of the structure is controlled by a combination of multiple loads (such as the hinge structure of the plant) ), the potential of the structure cannot be fully exploited, and material is wasted. In this paper, based on the analysis of the elasticity calculation of hinge joints and trusses in a high-rise building, the redistribution of internal forces due to plastic deformation is taken into account, and plastic analysis is attempted using the method of bending moment modulation. According to this