侧向干扰下双层门式刚架静力屈曲的计算机模拟
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摘要
用ANSYS有限元软件,对柱脚固接、在不规则竖向荷载和三种侧向荷载作用下的双层门式刚架的屈曲进行了计算机模拟,得到了不同大小的侧向干扰力作用下的双层门式刚架的临界屈曲荷载,以及结构的屈曲模态。模拟结果表明:在侧向集中干扰力的作用下,双层门式刚架的临界屈曲荷载随着作用力的大小和作用点的不同发生变化;在侧向三角形荷载干扰下,双层门式刚架发生了明显的屈曲变形,结构的右侧柱子中点处发生较大的位移,并且首先发生屈曲,影响了结构的整体稳定性。模拟结果对工程应用有一定的参考价值。
A computer-aided simulation is made of the static flexion of a double portal frame,the column footings of which are fixed,and which is under the action of both irregular vertical loads and three lateral loads,with the critical flexion loads and the simulated structural flexion state of the double portal frame under the action of different-size lateral disturbing forces obtained.The simulated result shows: under the action of the concentrated lateral disturbing forces,the critical flexion loads of the double portal frame vary with the size of the acting forces and the change in the acting points;under the disturbance of the triangular loads,obvious flexion deformations emerge in the double portal frame,with relatively great displacement emerging at the central point of the right-side column of the frame,as a result of which the column first flexes,and which affects the integral stability of the frame.The simulated result is supposed to be of certain referential value for the application of the computer-aided simulation to engineering.
A computer-aided simulation is made of the static flexion of a double portal frame,the column footings of which are fixed,and which is under the action of both irregular vertical loads and three lateral loads,with the critical flexion loads and the simulated structural flexion state of the double portal frame under the action of different-size lateral disturbing forces obtained.The simulated result shows: under the action of the concentrated lateral disturbing forces,the critical flexion loads of the double portal frame vary with the size of the acting forces and the change in the acting points;under the disturbance of the triangular loads,obvious flexion deformations emerge in the double portal frame,with relatively great displacement emerging at the central point of the right-side column of the frame,as a result of which the column first flexes,and which affects the integral stability of the frame.The simulated result is supposed to be of certain referential value for the application of the computer-aided simulation to engineering.
引文
[1]王林,肖亮.竖向均载下轻钢门式刚架极限承载力有限元分析[J].江苏科技大学学报,2008,22(6):13-17
[2]马晓明,姚振强.大跨度门式刚架结构的有限元分析[J].机械与研究,2008,24(6):72-74
[3]卜令全,夏军武.门式刚架结构抗地表变形性能分析[J].黑龙江科技学院学报,2010,20(5):353-359
[4]胡宗文,王元青.暴雪后门式刚架轻型房屋钢结构厂房的加固设计[J].四川建筑科学研究,2009,39(7):120-123
[5]曹杰,穆丹丹.门式刚架改良型节点抗震性能分析[J].世界地震工程,2010,26(3):199-203
[6]林功丁.门式刚架风荷载与地震作用的探讨[J].工业建筑,2004,34(9):84-87
[2]马晓明,姚振强.大跨度门式刚架结构的有限元分析[J].机械与研究,2008,24(6):72-74
[3]卜令全,夏军武.门式刚架结构抗地表变形性能分析[J].黑龙江科技学院学报,2010,20(5):353-359
[4]胡宗文,王元青.暴雪后门式刚架轻型房屋钢结构厂房的加固设计[J].四川建筑科学研究,2009,39(7):120-123
[5]曹杰,穆丹丹.门式刚架改良型节点抗震性能分析[J].世界地震工程,2010,26(3):199-203
[6]林功丁.门式刚架风荷载与地震作用的探讨[J].工业建筑,2004,34(9):84-87
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