凝聚着中国焊接工作者智慧、心血及能量的鸟巢国家体育场令世人瞩目,这座总建筑面积25.8万平方米、可以容纳91 000位观众的宏伟建筑充分体现出绿色、人文、科技三大理念。鸟巢国家体育场属于马鞍型大跨度交叉旋转布置门式钢桁架结构体系,这种设计方案主体空间结构新颖,建筑和结 The Bird’s Nest National Stadium, which contains the wisdom, energy and energy of Chinese welding workers, attracts worldwide attention. The grand building with a total construction area of ​​258,000 square meters and capable of accommodating 91,000 visitors fully embodies the three concepts of green, humanities and science and technology. The Bird’s Nest National Stadium belongs to the saddle-shaped long-span cross-rotating steel door truss structure. The main structure of this design is novel in space, construction and knot