北京大兴国际机场鼓形焊接空心球节点力学性能

Mechanical properties of the drum-shaped welded hollow spherical joints of the Beijing Daxing International Airport

北京大兴国际机场被英国《卫报》评选为"新世界七大奇迹"榜首。该文以北京大兴国际机场航站楼屋盖钢结构所采用的新型鼓形焊接空心球节点为研究对象,完成了鼓形焊接空心球节点足尺模型的抗拉和抗压破坏试验,揭示了节点的受力特点和失效机理;建立了精确的有限元数值模型,经试验数据验证后,研究了鼓面位置、是否加肋、鼓面数、壁厚、球径等因素对鼓形焊接空心球节点极限承载力的影响规律。在足尺试验和数值模拟研究成果基础上,提出了鼓形焊接空心球节点轴压和轴拉承载力计算公式与设计方法,为今后鼓形焊接空心球节点的分析与设计提供了技术支撑。

Beijing Daxing International Airport is ranked as one of the Top Seven Wonders of the New World by the Guardian.The airport uses drum-shaped welded hollow spherical joints in the steel roof structure.This study measured the tensile and compressive strengths of a full-scale model of the drum-shaped welded hollow spherical joints and analyzed the joint failure mechanism.A finite element model was then used to study the effects of the drum position,stiffening rib arrangement,drum size,wall thickness,and sphere diameter on the ultimate bearing capacity of the joints after verification of the model against test data.Design methods and calculational formulas were developed based on the full-scale test data and the finite element analyses to predict the axial tension and axial compression loadbearing capacities of drum-shaped welded hollow spherical joints.