李敏

【摘    要】：为提升高层建筑结构的稳定性，研究基于多道抗震防线的高层建筑连续抗倒塌性能。选取建筑结构试件，计算试件节点域屈服承载力与极限承载力，判断建筑结构抗震能力，计算建筑结构弹性模量，获取高层建筑结构连续抗倒塌性能相关系数，判断连续抗倒塌性能。研究结果表明：高层建筑在受到破坏时，受损框架抗剪承载力与完整框架之间的差异性较小，当最大基底剪力在耗能梁段遭受破坏时，屈服型耗能梁段框架抗剪承载力会相应升高，框架遭受破坏对高层建筑结构支撑框架抗剪承载力影响较低。

【关键词】：抗震防线；高层建筑；连续抗倒塌性能

【中图分类号】：TU973.31【文献标志码】：C【文章编号】：1008-3197（2023）02-62-03

【DOI编码】：10.3969/j.issn.1008-3197.2023.02.016

Analysis on Continuous Collapse Resistance Performance of High-rise Buildings

under Multi-channel Seismic Defense Lines

LI Min

（China Construction Second Engineering Bureau Co. Ltd.， Nanjing 210000， China）

【Abstract】：In order to improve the stability of high-rise building structures， the paper studies the continuous anti-collapse performance of high-rise buildings based on multiple seismic lines， firstly selects the building structure specimen， calculates the yield bearing capacity and ultimate bearing capacity of the specimen node domain， then judges the seismic capacity of the building structure， finally calculates the elastic modulus of the building structure， obtaines the correlation coefficient of the continuous anti-collapse performance of the high-rise building structure， and judges the continuous anti-collapse performance. The research results show that the difference between the shear bearing capacity of the damaged frame and the intact frame is small when the high-rise building is damaged， the shear bearing capacity will increase， and the failure of the frame will have a low impact on the shear bearing capacity of the high-rise building structural support frame.

【Key words】：seismic defense line; high-rise building; continuous collapse resistance performance

随着经济的发展及建筑技术的进步，高层建筑数量不断增多。与低层建筑相比，高层建筑结构在抗震性能与连续抗倒塌性能方面要求更加严格[1]。高层建筑连续倒塌，指的是由于結构局部失效引发的结构构件间的破坏传递，最终导致整个高层建筑出现倒塌[2]，具有不成比例与连续两个特性[3]。连续性体现在高层建筑破坏的传递；不成比例性体现在建筑结构遭受破坏的程度[4]。高层建筑连续倒塌的直接原因是受力构件失效，导致构件内力释放速度加快、重分布现象严重，对社会经济与生命安全造成重大威胁[5]。本文以实际工程为例，提出了基于多道抗震防线的高层建筑连续抗倒塌性能研究。

1 工程概况

某多功能建筑整体高度70 m；……