宁夏国际会展中心结构设计

Structural design of Ningxia International Convention and Exhibition Center

宁夏国际会展中心为复杂钢-混凝土混合结构,平面及竖向刚度差别较大,有必要进行整体计算分析。结构混凝土长度为248m,属超长混凝土结构。采用PMSAP及MIDAS/Gen软件进行计算分析,得到混凝土结构由于温差而产生的变形和内力分布规律,由此在设计中合理选择结构构件的刚度、采取相应的构造和施工措施、控制后浇带封闭的时间、释放屋盖支座由温差产生的水平力,达到了设计预期效果。对屋面钢桁架结构分别进行整体模型和单独钢结构模型计算,对比地震作用效应计算的差别。

Ningxia International Convention and Exhibition Center is a complex steel-concrete composite structure. It was necessary to make the global calculation and analysis for the large differences between planar and vertical stiffness. The structure, which is 248m in length, is a super-long concrete structure. PMSAP and MIDAS/Gen software were consulted to figure out the regularities of internal force distribution and the deformation caused by the temperature. Some measures were taken to achieve the rational designing effects, such as selecting the reasonable stiffness of structural components, adopting the corresponding structural and constructional measures, controlling the sealing time of post-poured strips, releasing the horizontal force of roof supports caused by temperature difference. Furthermore, the steel roof truss structure was calculated as a part of whole and as a separate structure respectively to compare the distinction of seismic affection.