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因结构局部破坏后荷载沿不同方向传递引起内力重分布,空间结构分析在连续倒塌研究中具有重要意义。该文为研究框架结构抵抗连续倒塌的特点,使用线性静力方法分析了空间钢框架撤柱后的受力性能,与单榀框架撤柱分析进行了比较,并研究了不同平面布置形式对最大需求能力比DCR(demand for the capacity ratio)的影响。研究结果表明,比较单榀框架和空间框架分析,最大DCR出现在空间分析中,结构整体布置形式与长跨、短跨布置形式共同影响结构最大DCR所在位置。
The structural analysis of the structure is of great significance in the study of continuous collapse due to the redistribution of internal forces caused by the transmission of loads in different directions after partial failure of the structure. In order to study the characteristics of continuous collapse of frame structure, linear static method was used to analyze the mechanical behavior of the steel frame after removing the column, compared with the analysis of single column frame removal, and the effects of different plane layout on the maximum The impact of demand capacity over demand for the capacity ratio (DCR). The results show that the maximum DCR appears in the spatial analysis when compared with the single frame and the spatial frame analysis. The overall arrangement of the structure and the layout of long span and short span jointly affect the location of the maximum DCR of the structure.