摘要
随着超高层建筑施工的不断增多,爬升模架系统也得到了广泛应用,然而,爬升模架系统中的构件会存在明显初始缺陷,但在设计阶段未被充分考虑,将影响爬模系统安全性。此外,架体结构中构件规格过大的冗余度会增加系统自重和造价。基于直接分析法,以构件初始几何缺陷为控制变量,采用NIDA程序对某实际工程所用施工爬升模架系统开展了多组二阶非线性参数分析;通过调整应力比较小的构件截面进行了结构优化分析。研究表明:实际工况下,初始几何缺陷对构件截面承载能力以及系统变形影响较大,施工中应控制构件变形;同时,经优化后,结构应力比分布更加合理,用钢量较优化前减少了12%。
With the increasing construction of super high-rise buildings,the climbing formwork system has also been widely used.However,the components in the climbing formwork system will have initial defects obviously,but they are not fully considered in the design stage,which will affect the safety of the climbing formwork system.In addition,excessive component redundancy in the frame structure will increase the system’s own weight and cost.Based on the direct analysis method,taking the initial geometric defects of components as the control variables,the NIDA program was used to carry out multiple sets of second-order nonlinear parameter analysis for the construction climbing formwork system used in an actual project.The structural optimization analysis was carried out by adjusting the section of the member with relatively small stress.The research shows that under the actual working conditions,the initial geometric defects have a great influence on the bearing capacity of the component section and the system deformation,and the deformation of the component should be controlled during construction.At the same time,the structural stress ratio distribution is more reasonable after optimization,and the steel tonnage is reduced by 12%compared with that before optimization.
作者
何佳斌
许浒
赵仕兴
刘东
廖林绪
余志祥
HE Jiabin;XU Hu;ZHAO Shixing;LIU Dong;LIAO Linxu;YU Zhixiang(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Sichuan Provincial Architectural Design and Research Institute Co.,Ltd.,Chengdu 610095,China;Complex Structure Design and Research Center,Sichuan Provincial Architectural Design and Research Institute Co.,Ltd.,Chengdu 610095,China;HUASHI Engineering Technology(Shenzhen)Co.,Ltd.,Shenzhen 518066,China)
出处
《建筑结构》
北大核心
2023年第7期85-89,97,共6页
Building Structure
基金
2021年广东省住房和城乡建设厅科技创新计划项目(2021-K20-230455)。
关键词
爬升模架系统
超高层建筑施工
直接分析法
结构优化
初始缺陷
climbing formwork system
construction of super high-rise building
direct analysis method
structure optimization
initial defect
