鄂尔多斯东胜体育场看台结构设计

Structural design on grandstand of Ordos Dongsheng Stadium

鄂尔多斯东胜体育场是一座带有可开闭屋顶的大型体育建筑,结构体系新颖独特。体育场由巨拱+钢拉索、固定屋盖、活动屋盖、碗状看台结构以及裙房组成。看台由斜柱、楼层梁与看台梁形成的径向刚架作为径向抗侧力体系,由环向楼面梁连接各榀径向刚架形成环向框架。为了避免对开合屋盖产生的不利影响,体育场看台混凝土结构不设缝,采取了后浇带超长延迟封闭等综合措施,减小混凝土温度收缩应力的影响。巨拱高129m、跨度330m,与地面垂线倾斜6.1°,通过23组钢索将屋盖大部分重力荷载传给巨拱,水平荷载则由下部看台混凝土结构承担。体育场中部活动屋盖最大可开启面积为10 076.2m2,可以很好地满足全天候的使用需求。对活动屋盖考虑了处于完全打开或完全闭合状态时,屋盖结构能够承受各种最不利的荷载与作用进行混凝土看台结构设计。当活动屋盖处于运动状态时,荷载取值根据具体情况适当减小,这样既保证了整体结构的安全,又节省了造价。

The Ordos Dongsheng Stadium is a large sports building with a retractable roof, which adopts a distinctive structural system. The stadium consists of giant arch, steel cables, fixed roof, retractable roof, bowl-shaped grandstand as well as podiums. Lateral forces on the grandstand are resisted by the radial frame which is composed by inclined columns, floor beams and stand beams. The radial frames are connected by toroidal floor beams to form toroidal frame. During the construction of the concrete structure, the post-cast strip is poured extremely late and the concrete structure has no construction joints left, in order to reduce the temperature shrinkage stress of the concrete and avoid adverse effects on the retractable roof. The giant arch has a maximum height of 129m and a span of 330m,with an inclination angle of 6.1 o from the vertical plane. The gravity of the roof is mostly transferred to the giant arch by 23 sets of steel cables, while the horizontal forces are bore by the concrete grandstand below, which greatly reduces the height of the fixed roof. The maximum open area of retractable roof in stadium is 10 076.2m2. The stadium can be well used under various weather conditions. The retractable roof is considered in the fully open state and closed completely. The cocrete grandstand is designed in the condition that roof structure can bear the most unfavorable load and effect. When the retractable roof is in motion, the load values are reduced appropriately according to the specific situation, so as to ensure the safety of the overall structure and save the cost.