国家游泳中心冰场人工冰面受力模式和弯曲应力计算方法

Force model and bending stress calculation method of artificial ice surface in ice rink of National Aquatics Center

为探析国家游泳中心双奥场馆装配式转换冰场冰面的受力机理,利用ABAQUS软件建立冰面的模型,分析各类荷载作用下的应力状态和分布模式,证明了弯曲破坏为装配式冰场冰面的主要破坏形式,破坏荷载主要来源于大吨位浇冰车的轮压等集中荷载作用。基于弹性地基上的薄板理论和混凝土路面弯曲应力的相关计算方法,提出冰场人工冰面最大弯曲拉应力的计算公式。通过改变冰面和挤塑板的相关参数,进行精细有限元分析,验证了冰面最大弯曲应力计算方法的准确性。所得成果为确定冰场人工冰的力学性能指标和进一步研究冰层破坏机理奠定了基础。

In order to analyze the force mechanism of the ice surface of the prefabricated conversion ice rink in the National Aquatics Center double olympic stadium,the ice surface model was established by ABAQUS software.The stress state and distribution pattern under various loads were analyzed,and it was proved that the bending failure is the main failure form of the prefabricated ice surface in the field,and the failure load mainly comes from the concentrated load such as the wheel pressure of the large-tonnage ice pouring truck.Based on the thin plate theory on elastic foundation and the related calculation method of the bending stress of concrete pavement,the calculation formula of the maximum bending tensile stress of artificial ice surface in ice rink was proposed.By changing the relevant parameters of the ice surface and the extruded plastic plate,a fine finite element analysis was carried out,and the accuracy of the calculation method of the maximum bending stress of the ice surface was verified.The obtained results lay a foundation for determining the mechanical properties of artificial ice in ice rinks and further studying the ice damage mechanism.