(1 广州市城市规划勘测设计研究院, 广州 510060; 2 奥雅纳工程顾问, 广州 510610)

摘要: 某办公楼为复杂连体结构,局部带大跨度悬挑,同时存在扭转不规则、构件不连续、尺寸突变和承载力突变等多项不规则. 采用基于性能化的抗震设计方法,设计时根据构件的重要性采取不同的性能目标,对结构分别进行了小震反应谱、小震弹性时程、中震性能设计、大震弹塑性时程等系列分析,并采取了相应的加强措施;考虑到连接体、悬挑结构的重要性,对结构的关键位置补充了楼板应力、楼板舒适度、施工阶段模拟、防连续倒塌等专项分析. 各项分析结果表明,结构整体及各构件的抗震性能均能达到预期目标,结构安全可靠.

关键词: 复杂连体结构; 悬挑结构 ; 空腹桁架; 抗连续倒塌; 弹塑性时程; 抗震性能设计

中图分类号:TU973 文献标志码:A 文章编号:1002-848X(2023)08-0054-08

DOI:10. 19701 / j. jzjg. LS220126

Structural design and analysis on a complex connected structure of office building with cantilever

LIU Yang1, LIU Yongtian1, YU Yonghui2, XU Jianxin1

(1 Guangzhou Urban Planning & Design Survey Research Institute, Guangzhou 510060, China;2 Arup, Guangzhou 510160, China)

Abstract: An office building is a complex connected structure with local large-span cantilever. There are irregularities suchas irregular torsion, component discontinuity, abrupt change of plane and bearing capacity. The performance-based seismicdesign method was carried out and different performance targets were adopted according to the importance of thecomponents. The elastic response spectrum analysis and time-history under frequent earthquakes, the performance designunder fortification earthquakes and the elastic-plastic time-history analysis under rare earthquakes were performed in thedesign and effective measures were taken to strengthen the weak parts of the structure. Considering the importance of theconnected structure and cantilever structure, multiple special analyses were conducted including analysis of story stress andcomfort, construction simulation and progressive collapse prevention analysis. The analysis results show that the seismicperformance of the whole structure and all components can reach the expected performance targets, and the structure is safeand reliable.

Keywords:complex connected structure; cantilever structure; vierendeel truss; progressive collapse prevention; elasticplastic time-history; performance-based seismic design

第一作者:刘洋,博士,正高级工程师,主要从事复杂结构设计研究,Email:23972057@ qq. com.

[引用本文] 刘洋,刘永添,余永辉,等. 某带悬挑复杂连体办公楼结构设计与分析[ J]. 建筑结构,2023,53(8):54-61. LIU Yang,LIU Yongtian,YU Yonghui,et al. Structural design and analysis on a complex connected structure ofoffice building with cantilever [J]. Building Structure,2023,53(8):54-61.