摘要
世界大学生运动会主体育场具有大悬挑、折面刚度大以及自重产生内力所占比例大的结构特点,其施工过程中的内力和变形变化复杂,时间效应和路径效应对结构的影响相对较大,因此在施工过程模拟分析中不能仅考虑成型结构在不同荷载组合下的受力和变形。采用一次性建模法跟踪模拟世界大学生运动会主体育场的施工过程,得出结构内力和变形的发展趋势及最优施工方案,将部分理论计算结果同实际监测结果进行对比。研究表明:安装顺序对大型复杂结构施工过程影响显著,采用有限元法对大跨空间钢结构进行施工预分析是可行的,可有效提高工程安全性,降低风险。在此基础上,明确提出了理论和实际产生偏差的原因并给出解决办法,为大型钢结构工程合理施工提供参考。
The roof of the main stadium for the World University Games has some structural characteristics such as long cantilever and high stiffness.It is a single-layer folded-plane latticed shell structure system.Because the internal force and deformation of the structures are very complicated during the construction process and the impact of time and process can not be neglected.For this reason,it is necessary to analyze the internal force and deformation of the World University Games main stadium during the construction process by using the method of constructional mechanics.Finally,the optimal constructional plan was obtained.The results from theory and practice were compared.The analytical results show that the erection sequence has great influence on internal force and deformation of the members.It is feasible to pre-analysis the construction by using the finite element method for the large-span structure.The paper also gives the reason of deviation and the corresponding solution is proposed.These results provide a reasonable basis for the construction.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2011年第5期70-77,共8页
Journal of Building Structures
基金
国家自然科学基金项目(50878181)
高等学校博士学科点专项科研基金(20096120110004)
关键词
大跨度空间结构
施工效应
有限元分析
内力
变形
large-span spatial structure
constructional effect
finite element analysis
internal force
deformation
