日照对钢框架-筒体体系施工阶段的影响分析

研究了钢框架-钢筋混凝土筒体体系（S＋RC）施工阶段在日照作用下,核芯筒和外框架的侧向与竖向变形问题.在分析S＋RC结构施工特点和日照辐射作用的基础上,设计出日照温差计算工况,给出了4种日照温差作用温度计算工况参数.以大连世界贸易大厦结构为例建立了分段施工的计算模型,并利用有限元程序SAP2000,对模型在2种施工方案下的不同施工阶段的日照作用进行了分析,得出核芯筒和外框架在各施工段侧向跟竖向的最大变形曲线.分析结果表明,不同施工阶段筒体顶部侧向变形值在6～30 mm之间,竖向最大变形近7 mm;外钢框架侧向和竖向变形分别在2～20 mm与4～27 mm之间,由此可见日照对S＋RC结构体系施工阶段的影响不容忽视.

Effect Analysis of Sunlight on the Steel Frame-reinforced Concrete Core-wall Structure in Construction

Lateral and vertical deformation of the core-wall and steel frame in the construction stage of the steel frame-reinforced concrete core-wall structure under the effect of sunlight is discussed in this paper. On the basis of the analysis of the constructional characteristics of S ＋ RC structural and the role of sunlight radiation, the calculating case of sunlight action are designed, and then four same parameters corresponding to the calculating cases are provided. By taking Dalian World Trade Building structure as an example and using the finite element program SAP2000, we establish the construction computation model and finish the related computation of two different construction plans under sunlight load. Meanwhile, the curves of the maximum lateral and vertical deformation of the core-wall and steel frame are obtained. It is showed that the lateral deformation value of top shell sway between 6 to 30mm and the vertical deformation nearly to 7ram in different stages of construction .The maximum lateral and vertical deformation are respectively between 2 and 20mm. 4 and 27mm for steel frame. So the influences of sunlight on the construction stage of the steel frame-reinforced concrete core-wall structure can not be ignored.