雄安体育中心体育场结构设计

Structural design on the stadium of Xiong’an Sport Center

雄安体育中心体育场主体结构采用钢框架-支撑体系,屋盖钢结构由外圈屋盖钢结构和屋顶中央网壳组成,看台区域均采用组合型肋梁预制看台板。详细介绍了该体育场结构方案,包括看台钢结构设计、拱脚滑动释放、网壳结构体系、典型节点设计等。通过方案比选,屋顶中央网壳采用分索式索承铝合金网壳的结构体系,提高了索承结构对不规则建筑平面的适应能力。设计中对南侧拱脚进行了施工工序优化,拱脚处采用滑动释放措施,降低了看台钢结构南侧拱桁架的水平推力。本项目位于高烈度区,采用了速度型黏滞阻尼墙作为结构的减震措施,在多遇地震下黏滞阻尼墙作为结构的安全余量储备,在罕遇地震作用下,阻尼墙耗能占比5%。在部分应力较大的铝合金网壳节点中设置腹板加强板,提高了结构的安全性。

The main structure of the stadium of Xiong’an Sport Center adopts a steel frame-support system,the roof steel structure is composed of outer ring roof steel structure and roof central reticulated shell,and prefabricated grandstand plate with composite-ribbed beam is used in the grandstand area.The structural scheme of stadium was introduced in detail,including steel structure design of the grandstand,sliding release of arch foot,reticulated shell structure system,typical node design,etc.Through scheme comparison,the central reticulated shell of the roof adopts the structural system of single-layer aluminum alloy reticulated shell and chord-supported cable net,which improves the adaptability of the cable-supported structure to irregular building planes.The construction process of the south arch foot was optimized in the design and sliding release measures was adopted at the arch foot,which reduces the horizontal thrust of the south side arch truss in the grandstand steel structure.The project is located in a high-intensity area,and the velocity-type viscous damping wall is used as the shock absorption measure of the structure,the viscous damping wall is taken as the safety margin reserve of the structure under frequent earthquakes,the energy consumption of the viscous damping wall accounts for 5%under rare earthquakes.The safety of the structure is improved by setting web stiffeners in some aluminum alloy lattice shell joints with high stress.