(1 西南交通大学土木工程学院, 成都 610031; 2 四川省建筑设计研究院有限公司, 成都 610095;3 四川省建筑设计研究院有限公司复杂结构设计研究中心, 成都 610095;4 华西工程科技 (深圳) 股份有限公司, 深圳 518066)

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%.

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

中图分类号:TU745. 1,TU755. 2 文献标志码:A 文章编号:1002-848X(2023)07-0085-05

DOI:10. 19701 / j. jzjg. SADI2318

Analysis and optimization of construction climbing formwork system based on direct analysis method

HE Jiabin1, XU Hu1, ZHAO Shixing2,3, LIU Dong4, LIAO Linxu1, YU Zhixiang1

(1 School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2 Sichuan ProvincialArchitectural Design and Research Institute Co. , Ltd. , Chengdu 610095, China; 3 Complex Structure Design andResearch Center, Sichuan Provincial Architectural Design and Research Institute Co. , Ltd. , Chengdu 610095, China;4 HUASHI Engineering Technology (Shenzhen) Co. , Ltd. , Shenzhen 518066, China)

Abstract: With the increasing construction of super high-rise buildings, the climbing formwork system has also been widelyused. However, the components in the climbing formwork system will have initial defects obviously, but they are not fullyconsidered in the design stage, which will affect the safety of the climbing formwork system. In addition, excessivecomponent redundancy in the frame structure will increase the system’s own weight and cost. Based on the direct analysismethod, taking the initial geometric defects of components as the control variables, the NIDA program was used to carry outmultiple sets of second-order nonlinear parameter analysis for the construction climbing formwork system used in an actualproject. The structural optimization analysis was carried out by adjusting the section of the member with relatively smallstress. The research shows that under the actual working conditions, the initial geometric defects have a great influence onthe bearing capacity of the component section and the system deformation, and the deformation of the component should becontrolled during construction. At the same time, the structural stress ratio distribution is more reasonable afteroptimization, and the steel tonnage is reduced by 12% compared with that before optimization.

Keywords: climbing formwork system; construction of super high-rise building; direct analysis method; structureoptimization; initial defect

∗2021 年广东省住房和城乡建设厅科技创新计划项目(2021-K20-230455).

第一作者:何佳斌,硕士研究生,主要从事建筑高处施工与坠落防护研究,Email:2194479227@ qq. com.

[引用本文] 何佳斌,许浒,赵仕兴,等. 基于直接分析法的施工爬升模架系统优化设计[ J]. 建筑结构,2023,53(7):85-89,97. HE Jiabin,XU Hu,ZHAO Shixing,et al. Analysis and optimization of construction climbing formworksystem based on direct analysis method[J]. Building Structure,2023,53(7):85-89,97.