flexural stiffness modification of cracked section

[parhyang]

hi,it’s commonly used in flexural stiffness modification by scale factor (0.0 to 1.0) of cracked section in beam, column, shearwall and slabs. However i did not find these all setting in NextFEM Designer, it could be useful when available at Element properties menu for effective flexural, axial, torsional and shear stiffness independently. The first two setting are common is seismic design and second order analysis. Thank you.

Attachments:

You must be logged in to view attached files.

[NextFEM Admin]

Hello,
this is a property of the material. See Materials / select a material and then click on Modify Material… / Tools menu / Set stiffness factor.

[parhyang]

thanks, there’s placed at another menus even it seems not exactly the same. Element stiffness modification of beam or shell element can be assigned independently of axial, flexure, torsion and shear e.g 1.0A, 0.7I, 1.0J, 0.7As

Attachments:

You must be logged in to view attached files.

[NextFEM Admin]

The option is on the material level because otherwise you can assing inconsistent beam stiffnesses. If you need to act to a single DoF (eg. axial or shear only) you can act at a section level (see section properties, Properties tab) by changing A, Avz, Avy, Jy, Jz, and so on.

[parhyang]

thanks for the hints of work around for element stiffness modification. Maybe, it can be useful when allowed to input as formula, e.g =0.00026667*0.7 to easily remember and modify.

Attachments:

You must be logged in to view attached files.

[Author]

Posts