侧向干扰下双层门式刚架静力屈曲的计算机模拟

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。

The Computer-Aided Simulation of the Static Flexion of the Double Portal Frame Under the Action of the Lateral Disturbance

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.