基于拆除构件法的建筑结构抗连续倒塌研究进展

A review on progressive collapse resistance research progress of structure based on alternate load path method

连续倒塌一旦发生就会造成严重的人员伤亡和经济损失。因此,研究结构在遭受意外荷载时跨越局部破坏区域的抗连续倒塌性能具有重要意义。作为连续倒塌分析和抗连续倒塌设计的重要研究方法,拆除构件法既能较好地评价结构的抗连续倒塌性能,又能有效地提高结构的抗连续倒塌能力。为进一步提高拆除构件法的计算精度和效率,本文首先阐述了连续倒塌破坏机理和拆除构件法基本原理,在此基础上,重点分析了计算模型和计算方法对拆除构件法计算精度和效率的影响,最后指出了目前研究中存在的不足及今后研究中应加强的内容。

There will be serious casualties and economic losses in the event of the progressive collapse. Hence, it’s significative for studying the progressive collapse-resistance performance of structures that can bridge across the local damage zone when they are subjected to abnormal load. As an important approach of progressive collapse analysis and progressive collapse-resistance design, alternate load path method can not only evaluate the progressive collapse-resistance performance of structures, but also can improve the progressive collapse resistance of structures effectively. To improve the calculation accuracy and efficiency of alternate load path method further,the failure mechanism of progressive collapse and the basic principle of alternate load path method were described firstly in this paper. On this basis,the influences of calculation model and calculation method on the accuracy and efficiency of alternate load path method were analyzed emphatically. Finally,the deficiencies of the current research and the research that should be strengthened in the future were pointed out.