东莞环球财富大厦地下室混凝土结构温差效应分析

结构超长、复杂体型的地下室混凝土结构,具有较为显著的温度响应,在结构分析、设计与施工阶段需合理考虑环境温差效应。在综合考虑施工进度、后浇带设置、含地下室桩筏基础有限约束刚度、依时温差作用取值的基础上,结合混凝土收缩徐变时效特性等关键因素,建立了一套适用于地下室混凝土结构温差效应分析的精细化仿真分析方法。基于所述方法,开展了东莞环球财富大厦地下室混凝土结构施工及使用全寿命内温差效应的定量分析,明确了结构温差作用下受力较不利构件及变形较大部位,针对性提出结构优化设计建议及施工控制措施,相关成果可为地下室混凝土结构设计提供参考。

Analysis of temperature variation effects of basement concrete structure of Dongguan Global Fortune Building

The basement concrete structure with super-long structure and complex shape has a relatively significant temperature response, and the environmental temperature variation effects needs to be considered in the structural analysis, design and construction stages. On the basis of comprehensive consideration of construction schedule, post-pouring zone setting, limited restraint stiffness of basement piled raft foundation, and time-dependent temperature difference, combined with key factors such as concrete shrinkage and creep aging characteristics, a set of refined simulation analysis method suitable for the analysis of the temperature variation effects of basement concrete structure was established. Based on the method described, a quantitative analysis of the temperature variation effects during the construction and service life of the basement concrete structure of Dongguan Global Fortune Building was carried out. It clarified the unfavorable components and the larger deformation parts under the effect of the temperature difference of the structure, and suggestions for structural optimization design and construction control measures were put forward, and the relevant results can provide references for the design of basement concrete structures.