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005417

MSc. Grzegorz Fulczyk

2023-09-12

如何在 RFEM 6 中对波纹腹板进行建模？

回复:

波纹腹板梁进一步优化了钢结构结构。 They are often used to reduce the self-weight of main load-bearing elements and to prevent buckling failure of webs due to the corrugation.

该示例基于泽曼产品目录中的 WTA – 1250 – 300x20 梁。

To create a model of this beam, it's best to start by modeling a sine wave that will be used to edit the web. This consists of the steps shown below and in the attached images.

Create nodes representing sine function.

1 正弦波节点

Copy nodes to desired length of beam.

2 复制节点

In RFEM's Lines table, manually create spline from 1st to last node.

3 创建正弦样条

After these steps, it's recommended to create a parametric section with the dimensions of the corrugated beam. Members using this section can later be transformed into surfaces.

Create a parametric section with the geometry based on the desired beam.

4 定义梁截面

Generate surfaces from members.

5 从杆件生成面

With this set of surfaces, it is recommended to copy the sine spline into the position of the top and bottom edge of the surface representing the web.

Later, it is required to change the geometry type of the web surface to Quadrangle and redefine the boundary lines of this element.

Copy sine into the top and bottom of the web.

6 将正弦波复制到腹板表面的上下边缘

Change the web geometry type to Quadrangle.

7 更改腹板面的几何类型为四边形

Exclude straight lines from the web surface and add sine lines.

8 腹板的外形边界重新分配

After preparing the geometry, it's required to focus on finishing the model for the calculation. Select the start and end lines of the member and create a member with the type Rigid.

9 在面起始和终止线创建杆件

After that, it's possible to define nodal supports on the beam and loads in the model. In order to check the resulting internal forces of a member, it is recommended to define a result beam on the main center line. Finishing all of these steps allows you to start the analysis of the beam.