西安咸阳国际机场东航站楼钢结构设计

Steel structural design of east terminal building of Xi’an Xianyang International Airport

西安咸阳国际机场东航站楼屋盖、支承系统及登机桥采用钢结构,东航站楼屋盖钢结构分为主楼及6条指廊区域。主楼屋盖为重檐三叠造型,总长521m,设置4道竖向采光天窗以及中央水平采光天窗,结构采用Y形柱及斜柱支承的网架结构,Y形柱采用八边形实腹式截面;指廊屋盖采用折型钢架结构,登机桥为钢桁架结构。竖向及水平天窗的存在会对屋盖结构产生不利影响,对其进行分析并设置了加强桁架使力流能够有效传递并提高屋盖结构的整体性。对屋盖进行了极限承载力分析、多维多点时程分析、防连续倒塌分析,并对造型复杂的Y形柱和复杂节点进行了有限元分析。分析结果表明,屋盖结构体系合理,传力明确,节点及构件安全可靠。

Steel structures are used for roof structure and its supporting system and the boarding bridge of east terminal building of Xi’an Xianyang International Airport. The roof steel structure of east terminal building is divided into the main building and six corridor areas. The roof of the main building is in the shape of double eaves and three layers,with a total length of 521m. There are four vertical skylights and a central horizontal skylight. The structure adopts a grid structure supported by Y-shaped columns and inclined columns. The Y-shaped columns adopt an octagonal solid abdominal section;the corridor roof adopts a folded steel frame structure. The boarding bridge is a steel truss structure. The existence of vertical and horizontal skylights adversely affected the roof structure,so it was analyzed and reinforced trusses were set up so that the force flow could be effectively transmitted and the integrity of the roof structure could be improved. The ultimate bearing capacity analysis,multi-dimensional and multi-point time-history analysis,and anti-progressive collapse analysis were carried out on the roof,and the finite element analysis was carried out for the complex Y-shaped columns and complex nodes. The analysis results show that the roof structural system is reasonable,the force transmission is clear,and the nodes and components are safe and reliable.