摘要
大跨度支撑体系在施工过程中有着周期长、施工工序多、施工技术性强等特点,因此在施工过程中极易出现支撑体系倒塌事件。为确保施工过程的安全可靠,以嘉兴市华之毅时尚美术中心项目为例,探讨了支撑体系中各构件在混凝土浇筑阶段、张拉预应力阶段以及整个拆模阶段的应力分布。运用动态化实时监测与有限元数值仿真相结合的方法,对大跨度预应力结构支撑体系施工过程的受力特点与变形进行研究,通过监测数据同数值分析结果的对比分析,得到监测值与模拟值误差不超过10%的结论。在验证监测方案制定合理性和模型建立可靠性的同时,也确保了各个阶段施工的安全可靠,避免支撑体系在施工过程中发生倒塌,从而为类似工程提供技术参考。
The long-span support system has the characteristics of long period,many construction procedures and strong construction technology in the construction process,therefore,the collapse of support system is very easy to occur in the construction process.In order to ensure the safety and reliability of the construction process,taking Jiaxing Huazhiyi Fashion Art Center project as an example,the stress distribution of each component in the support system in the concrete pouring stage,tensioning and prestress stage and the whole formwork removal stage are discussed.Using the method of combining dynamic real-time monitoring and finite element numerical simulation,the stress characteristics and deformation of long-span prestressed structural support system during construction are studied.Through the comparative analysis of numerical analysis results and monitoring data,it is concluded that the error between monitoring value and simulation value is no more than 10%.While verifying the rationality of monitoring scheme formulation and the reliability of model establishment,it also ensures the safety and reliability of construction in each stage.Thus,the collapse of the support system is avoided during construction,so as to provide technical reference for similar projects.
作者
张建中
张俊诗
孙强
ZHANG Jianzhong;ZHANG Junshi;SUN Qiang(College of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China)
出处
《兰州工业学院学报》
2023年第2期55-59,共5页
Journal of Lanzhou Institute of Technology
基金
国家重点基础研究项目(2012CB719703)
安徽省高校省级自然科学研究项目(YJS20210498)。
关键词
大跨悬挑梁
支撑体系
施工监测
有限元
施工过程
long span cantilever beam
support system
construction monitoring
finite element
construction process
作者简介
张建中(1997-),男,安徽阜阳人,硕士生。
