中文摘要：

以钢筋混凝土平面框架为分析对象，采用解析法讨论了钢筋混凝土框架结构连续倒塌全过程及相应抗连续倒塌机制和抗连续倒塌能力，推导了梁机制、复合机制、悬链线机制等各种抗力的理论计算公式。将这种分析方法和理论计算公式用于笔者完成的2个钢筋混凝土空间框架结构的连续倒塌试验，连续倒塌的抗力计算结果与试验结果符合较好。基于结构抗连续倒塌的自身特点，提出了“结构抗连续倒塌的延性要求与结构抗震的延性要求是不同的”这一观点，建立了钢筋混凝土框架结构抗连续倒塌延性系数的定义和计算方法。结合连续倒塌过程、抗连续倒塌机制、抗力和延性的分析，提出了混凝土框架结构抗连续倒塌的延性设计要求。

英文摘要：

Process, mechanism and resistance of progressive collapse for reinforced concrete plane frame struc- tures were analyzed by using analytic method in this study. Calculating formulas of resistance for beam, compound and catenary mechanism were presented. This method was applied to analysis two experimental models which were finished with reinforced concrete spatial frame structures by the authors. The analysis results were well agreed with the test data. On the basis of progressive collapse own characteristics, the viewpoint that the ductility requirement was different between progressive collapse and seismic was presented. The definition and calculation method of duc- tility coefficient were given. Combining with analysis on process, mechanism, resistance and ductility, ductility-de- sign requirements for progressive collapse of reinforced concrete frame structures were put forward.