北京大兴国际机场南航基地1号机库大厅弹塑性时程分析

Elasto-plastic time history analyses of No.1 hangar hall of China Southern Airlines base in Beijing Daxing International Airport

为充分考察北京大兴国际南航基地1号机库大厅结构抗震性能,采用ABAQUS6.11对结构进行弹性时程分析和弹塑性时程分析,分析中采用ABAQUS提供的材料本构模型和用户自定义材料本构模型,计算了小震和大震作用下机库大厅的响应。计算结果表明:小震和大震作用下,机库大厅的柱顶最大位移角均小于规范限值。网架整体保持弹性,局部与柱顶相连部分有轻微屈曲;工字形双肢格构柱保持弹性,多肢格构式钢管混凝土柱的柱底有轻微屈服;格构柱柱间防屈曲支撑有轻微屈服,大门角柱普通支撑屈曲失稳。多肢格构式钢管混凝土柱和大门中柱的混凝土历史最大压应变均小于峰值应变。由于结构X方向长度较长,在计算的过程中,考虑了行波效应对结构的影响。大震作用下,考虑行波效应后,整体结构最大柱顶位移角有所增加,但依然满足规范限值。

In order to fully investigate the seismic performance of the NO.1 hangar hall of China Southern Airlines base in Beijing Daxing International Airport,the elastic time-history analysis and elasto-plastic time-history analysis of the structure were carried out by ABAQUS 6.11,and the response of hangar hall under small earthquakes and rare earthquakes was calculated.The material constitutive model provided by ABAQUS and user-defined material constitutive model were used in the analysis.The results show that the maximum story drift angle of the column top of hangar hall is less than the limiting value given in the code under small earthquakes and rare earthquake.The space truss remains elastic as a whole,and the part connected to the top of the column is slightly buckled;the I-shaped double-leg lattice column remains elastic.The column bottom of the multi-leg lattice concrete-filled steel tube column yielded slightly;the BRB between the lattice column columns yielded slightly,and the gate corner column ordinary support buckled instability.The maximum historical compressive strains of concrete in the multi-leg lattice concrete-filled steel tube column and the central column of the gate are less than the peak strain.Because the span in X direction of structure is so large,the traveling wave effect on the structure is also considered in the calculation process.Under the action of a rare earthquake,considering the traveling wave effect,the maximum story drift angle of the overall structure increases,but it still can meet the limiting value of code.