摘要
深圳红树西岸地下室1层的面积约50000m2,平面复杂,长度超过300m,不设永久伸缩缝,为一超长、超宽大面积混凝土结构,温差收缩效应在该类结构中更为复杂突出,仅通过构造措施难以解决。在对国内外温差计算分析研究基础上,参照文献[1]提出的温差效应计算新方法,首次对复杂超大型项目地下室顶、底板的温差收缩效应进行了完整的有限元计算分析。计算分析结果表明,文献[1]提出的温差效应计算方法及温差效应施工模拟、地基或桩基的有限约束刚度,计及混凝土收缩徐变、计及后浇带影响等理念可广泛应用于大型地下室及超长混凝土结构实际工程中,具有很好的可操作性。并在此基础上提出了解决超大面积混凝土结构温差效应的针对性措施,对面广量大的大体量混凝土结构设计有一定的参考价值。
The basement area of the Mangrove West Coast Building has around 50,000m2 and a length exceeding 300m.It is designed as a super scale concrete structure without dilatation joint.Such kind of super long structure is accompanied by significant temperature variation and shrinkage effect,which design cannot be satisfied by using the common detailing methods alone.Based on the worldwide relevant researches on temperature variation and shrinkage effect,and by referring to the new calculating method presented in literature[1],a comprehensive finite element approach is adopted to the analysis of the mass basement concrete structure with irregular shape and super size.The computation results indicate that the approach,the construction simulation of temperature variation,the limited restrain stiffness of pile,the shrinkage and creep effects of concrete,and the casting strip effect,can be easily applied to the analysis and calculation of super scale and mass long concrete structure projects.Through the analysis,the temperature variation and shrinkage stress of basement slab have been calculated,the construction suggestion to decrease the related effect has been proposed,which would be practically meaningful to the design of mass concrete structures more widely used.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2009年第S1期154-158,共5页
Journal of Building Structures
基金
国家自然科学基金资助项目(50248005)
关键词
超长混凝土结构
温差收缩效应
施工模拟
温差取值
基础约束刚度
徐变
收缩
后浇带
mass concrete structure
temperature variation effect
construction simulation
value of temperature variation
the limited restrain stiffness of pile or foundation
creep
casting strip
