双螺旋钢结构斜立柱施工稳定性分析
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摘要
以长沙梅溪湖城市岛双螺旋观景平台为工程背景,基于ANSYS软件建立其钢结构斜立柱有限元分析模型。通过特征值屈曲分析得到斜立柱在第4层坡道吊装过程中的失稳屈曲荷载系数,发现设置钢棒之后,斜立柱的一阶失稳荷载为不设置钢棒工况下的4倍;通过非线性屈曲分析得到考虑材料、几何及初始缺陷的斜立柱在第4层坡道吊装过程中的失稳荷载,同时得到斜立柱在考虑不同非线性条件下的失稳模式。
Taking the double helix viewing platform of Changsha Meixi Lake City Island as the engineering background, the finite element analysis model of inclined column of steel structure was established based on ANSYS software. The buckling load coefficients of the inclined column in the lifting process of fourth stories were obtained by eigenvalue buckling analysis. It was found that the first order buckling load of the oblique column with steel bars was four times as much as the case without steel bars. Through nonlinear buckling analysis, the buckling load of the inclined column considering the material, geometry and initial imperfection in the lifting process of the fourth story slope was obtained. At the same time, the instability model of inclined column under different nonlinear conditions was obtained.
Taking the double helix viewing platform of Changsha Meixi Lake City Island as the engineering background, the finite element analysis model of inclined column of steel structure was established based on ANSYS software. The buckling load coefficients of the inclined column in the lifting process of fourth stories were obtained by eigenvalue buckling analysis. It was found that the first order buckling load of the oblique column with steel bars was four times as much as the case without steel bars. Through nonlinear buckling analysis, the buckling load of the inclined column considering the material, geometry and initial imperfection in the lifting process of the fourth story slope was obtained. At the same time, the instability model of inclined column under different nonlinear conditions was obtained.
引文
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[3] 陈绍蕃. 具有多道弹性支撑杆的钢柱稳定计算[J].西安建筑科技大学学报,2011,43(2):153-159.
[4] 马晓董,陈天虹,虞祝帅.轻钢蒙皮结构墙板支撑钢柱的侧向稳定分析[J].建筑科学与工程学报,2008,25(2):111-115.
[5] 悉地国际设计顾问(深圳)有限公司. 长沙梅溪湖国际新城城市岛工程施工图设计[R].深圳:悉地国际设计顾问(深圳)有限公司,2014.
[6] 张剑,刘细林,龚家军,等.螺旋体钢桁架-混凝土主体结构综合施工技术[J].施工技术,2006(4):8-13.
[7] 王新敏. ANSYS工程结构数值分析[M].北京:人民交通出版社, 2007.
[8] 中华人民共和国住房和城乡建设部.钢结构设计规范:GB 50017—2003[S].北京:中国计划出版社,2003.
[9] 陈骥. 钢结构稳定理论与设计[M]. 北京:科学出版社,2003.