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浦东国际机场T2航站楼主楼钢结构屋盖采用的Y形柱的稳定性能对整体结构的安全至关重要。通过对整体结构进行弹塑性大位移稳定性分析,针对Y形柱在不同荷载作用组合下的不同受力特点,采用考虑双折线材料模型、大位移几何非线性和初始几何缺陷的非线性计算方法,全面分析了竖向静力荷载下,X向和Y向水平地震作用下Y形柱的整体稳定性能。分析结果表明钢屋盖的Y形柱具有良好的稳定性能,是安全可靠的。
The stability of the Y-shaped columns used in the steel roof of the T2 terminal building of Pudong International Airport is crucial to the overall structural safety. Through the analysis of elastic-plastic large displacement stability of the whole structure, aiming at the different force characteristics of Y-shaped columns under different load combinations, a nonlinear calculation method considering the material model of double-fold line, large displacement geometric nonlinearity and initial geometric defect , The overall stability of Y-shaped columns under X-direction and Y-direction horizontal earthquakes under vertical static load is analyzed comprehensively. The analysis results show that the Y-shaped steel roof has good stability and is safe and reliable.