摘要
长安乐传媒港是十四届全运会重要配套项目,为南侧带3层大悬挑的不规则复杂结构,最大悬挑长度38.5m。主体结构采用钢结构框架-支撑体系,悬挑部分采用钢桁架结构。针对大悬挑结构设计难点开展了分析和研究;重点介绍了整体结构方案选型、结构整体分析结果以及结构抗震性能化设计结果;也重点介绍了单人行走激励和人群激励下悬挑钢桁架舒适度分析,考虑长悬挑结构安装过程、卸载顺序和楼板刚度形成次序的施工模拟分析,以及长悬挑对基础设计的影响。结果表明,本工程的多层长悬挑构结构具有较高的安全储备,整体结构具有良好抗震性能;长悬挑结构设计中需要特别关注施工过程的影响,基础设计时应考虑竖向构件受拉的不利影响。
Midea Center of Chang′an Yue is an important supporting project of the 14th National Games of the People′s Republic of China.It is an irregular complex structure with three layers of large cantilevers on the south side,with a maximum cantilever length of 385m.Steel frame⁃bracing system is adopted by the main structure,and steel truss structure is adoptd by the cantilever part.The analysis and research on the design difficulties of large cantilever structure were carried out.The scheme selection of the overall structure,the analysis results of the overall structure and the performance⁃based seismic design results of the structure were mainly introduced.The comfort analysis of cantilever steel truss under single walking excitation and crowd excitation,the construction simulation analysis considering the installation process,unloading sequence and floor stiffness formation sequence of long cantilever structure,and the influence of long cantilever on foundation design were also mainly introduced.The results show that the multi⁃story long cantilever structure of this project has a high safety reserve,and the overall structure has good seismic performance.In the design of long cantilever structure,special attention should be paid to the influence of construction process,and the adverse effect of vertical component tension should be considered in foundation design.
作者
王洪臣
郜京峰
郭东
WANG Hongchen;GAO Jingfeng;GUO Dong(China Northwest Architecture Design and Research Institute Co.,Ltd,Xi′an 710018,China)
出处
《建筑结构》
北大核心
2024年第18期87-94,共8页
Building Structure
基金
陕西省科技厅重点研发项目“多杆件交汇复杂节点受力性能及施工建造工艺关键技术研究(2022SF-121)”。
关键词
多层长悬挑结构
钢结构框架-支撑体系
抗震性能化设计
舒适度
施工模拟
multi⁃storey long cantilever structure
steel frame⁃bracing system
performance⁃based seismic design
comfort
construction simulation
