【摘要】 建成后的北京A380机库将是世界最大的飞机维修库之一,其屋盖跨度362.6m,进深110m,总高40m。机库屋盖采用钢网架与大门边桁架相结合的方案,其支承柱列为三边布置四肢钢管混凝土柱与柱间支撑,大门一边仅跨中设置一根钢筋混凝土支承柱。该机库跨度大,所建场地限高严格,屋盖悬挂荷载大,处于高烈度区,给结构设计带来很大难度。本文介绍了机库结构选型、受力特点及设计优化,以及针对上述问题的计算分析和试验研究,包括:根据风洞试验的结果调整风荷载体型系数,并分析确定各种风向角下的风振系数;采用不同程序进行整体结构地震反应分析,考虑了三维地震作用和多点输入的影响;对大门柱在各种荷载工况及其不利组合下的安全性进行有限元分析;根据机库内部温度场分析结果,合理选取计算温差,分析对结构安全的影响;对复杂节点进行足尺和大比例模型试验、有限元分析和设计优化,确保其安全可靠。更多还原

【Abstract】 Beijing A380 hangar at Capital Airport will be one of the largest hangars in the world after completion, with 362.6m in span, 110m in depth and 40m in height. The steel space frame together with a truss at the door-side was selected as its roof system. The roof was supported by the four-leg concrete-filled steel tube columns at three sides of the perimeter and a rectangular hollow reinforced concrete column at the middle of the door-side. There are many challenges in its structural design, including the super large span of the roof structure, heavy suspended movable equipments and cranes, height limitation over airport and the location which is a severe earthquake zone, etc.. Together with the optimization of structural system and integrated analysis of the structure, the related analytical results and experimental study results are presented in this paper. The wind shape factors were based on the results of wind tunnel test and the wind flutter factors were calculated by numerical analysis. Seismic response analyses were performed considering the 3-dimensional seismic excitations and the multiple-support excitations. The behavior of the column at the door-side was analyzed under different load cases. The temperature variations were determined according to temperature field analysis. Tests of full-scale and large-scale specimens of the complicated roof joints and FEM analysis were carried out to ensure their safety and reliability.更多还原