基于构件拆除法的不规则预压装配式框架连续倒塌分析

文章通过ABAQUS有限元模拟软件建立了L形平面不规则预压装配式PC框架，设置多种不同工况，研究了拆除各个位置承重柱后该框架剩余结构的抗连续倒塌机理。研究表明：预压装配式结构可提高结构整体的最大抗力；预应力钢筋的配置可提高结构的抗连续倒塌能力，并在悬链线阶段提高效果明显；柱失效位置对结构抗连续倒塌有着重大的影响，转角柱的结构抗连续倒塌性能介于内柱与长边中柱之间，其破坏位置越低、破坏时间越早，破坏范围越大。

Progressive Collapse Analysis of Irregular Pre-pressed Frame Structure Based on Column Removal Method

The article uses ABAQUS finite element simulation software to establish an L-shaped plane irregularly pre-pressed assembled PC frame. Setting a variety of working conditions, the mechanism of structural resistance against progressive collapse of the remaining frame structure was studied when removing different load-bearing columns. The results show that the pre-pressed assembly structure can increase the maximum resistance of the structure; the configuration of prestressed steel bars can improve the structural resistance against progressive collapse, and the effect is better in the catenary stage. The failure position of the column has a significant impact on the structural resistance against progressive collapse, and the resistance of the corner column is between the inner column and the long-side center column. The lower the failure position and the earlier the failure time, the larger the failure range.