钢筋混凝土框架工程抗连续倒塌的问题

介绍了国内外钢筋混凝土框架结构抗连续倒塌问题的设计方法和发展现状,运用拆除构件法对实际工程进行了连续倒塌分析。通过对底层角柱C4、底层短边中柱C2、底层长边中柱C13和底层内柱C14运用拆除构件法的分析,得出五点分析结论。在此基础上参考国内文献,提出四个值得探究的问题,即设计方法的选择、荷载和材料强度的取值以及拉结强度设计法的探讨和应用补充,并进行了静力弹性法中强度判断准则的讨论。最后给出六点设计建议,可为类似工程的抗倒塌设计提供参考。

Some problems on progressive-collapse-resistance of RC frames engineering

This paper begins with introducing the prevailing design of progressive collapse resistance in the case of RC frame structure at home and abroad.The paper proceeds with the analysis of progressive collapse resistance arising from practical RC frame engineering project using the alternative path method.The analysis of corner column C4,short side center column C2,long side center column C13,inner column C14 at the first floor leads to 5 analysis conclusions which involve the insight into 4 problems,such as the choice of the design method,the values of load and material strength,the discussion and application complements of tie force method,and the discussion of strength failure principal of the static elastic method.The paper ends with 6 design suggestions given to designing progressive collapse resistance for a similar engineering.