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通过8根箱形钢柱在偏心常轴压、柱顶反复水平荷载作用下的拟静力试验,研究地震作用下合肥新桥机场航站楼大型箱形钢柱的壁板稳定性及其抗震性能。试验结果表明:在小震作用下,合肥新桥机场航站楼箱形钢柱处于弹性受力状态,且壁板稳定;在大震作用下,箱形钢柱壁板基本处于弹塑性受力状态,出现塑性变形,但壁板仍然满足稳定性要求。腹板宽厚比是影响构件抗震性能的重要因素,腹板宽厚比越大,滞回曲线越不饱满,试件的承载力及刚度退化越严重。最后,提出大跨度空间结构箱形钢构件的加工制作构造措施及抗震设计建议。
Based on the quasi-static tests of eight box-shaped steel columns under eccentric axial load and repeated horizontal load on the top of column, the wall stability and seismic behavior of large box-shaped steel columns in Hefei Xinqiao Airport Terminal under earthquake action are studied performance. The test results show that the box girder of Hefei Xinqiao Airport terminal is under elastic force and the wall plate is stable under the action of minor earthquakes. Under the action of large earthquakes, the box girder siding is basically in elastic-plastic force State, plastic deformation occurs, but the siding still meet the stability requirements. The ratio of web width to thickness is an important factor that affects the seismic performance of members. The larger the ratio of web width to thickness is, the less hysteresis curve is, and the more serious the bearing capacity and rigidity of the specimen degrade. Finally, the manufacturing measures and seismic design proposals of the box-shaped steel members with long-span space structure are proposed.