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南太湖湿地奥体公园游泳馆屋盖东西对称,屋盖曲面依建筑造型确定。采用变截面箱型钢梁结构体系,最大跨度为56.8m,两侧悬挑最大跨度为28.7m,入口处最大悬挑跨度为21.0m。选择其中跨度最大的一榀钢曲梁,比较梁单元模型和板单元模型建模计算的异同,然后用梁单元建立整体分析模型,分析比较了屋面钢结构单体模型和上下部分总装模型计算结果的不同。结果表明,因建筑效果而设置的中间两榀纵向钢梁,由于跨度过大而无法作为横向钢梁的支承点;设置加劲板可有效提高翼缘或者腹板抵抗局部屈曲的能力;因为单体模型中已包含钢柱,且屋盖与下部混凝土仅通过16根立柱相连,所以钢结构单体模型和上下总装模型的结果相近。
South Lake Taihu wetland Olympic Sports Center swimming pool roof symmetry, roof shape determined by the building shape. The use of variable section box steel beam structure system, the maximum span of 56.8m, the maximum span of 28.7m on both sides of the cantilever, the maximum cantilevered span of 21.0m. One of the steel beams with the largest span was selected to compare the similarities and differences between the beam element model and the plate element model. Then, the whole analysis model was established by using the beam element. The calculation results of the single-component steel roof model and the upper and lower part assembly models were compared and analyzed s difference. The results show that the middle two longitudinal girders due to the construction effect can not be used as the bearing point of the transverse girder because the span is too large. The stiffening plate can effectively improve the ability of the flange or the web to resist local buckling. Steel columns have been included in the model and the roof and lower concrete are connected by only 16 columns, so the results of the steel monolithic model are similar to those of the upper and lower assembly models.