Structural Analysis Wiki

Technical Terms Used in Dlubal Software

The Dlubal Structural Analysis Wiki explains technical terms used in structural analysis and design. The terms are given in alphabetical order and are usually used in Dlubal Software.

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# B Bending Beam

A bending beam is a beam that is mainly subjected to bending.

#### Features

A bending beam is characterized by transferring loads mainly by shear forces and bending, that is, the loads that act perpendicular to the member axis of the bending beam, see Image 01.

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The resulting bending moments in the member cause deformation of the member axis.

In the case of bending, a distinction must be made between the uniaxial and biaxial (double) bending.

#### Application

Bending beams can be dimensioned both as one-part and as multi-part cross-sections.

Due to the prevailing bending, it is necessary to achieve a high section modulus of a bending beam in order to optimize stresses and deformations and to meet both the ultimate and the serviceability limit state.

Basically, this is achieved by dimensioning as much cross-section area as possible outwards or above and below (for loading from above/below).

For example, a double T‑section is used in steel structures, which is perfectly suited as a bending beam, see Image 02.

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In timber and concrete structures, rectangular cross-sections are more common due to the convenience reason.

A typical example of a bending beam in concrete structures is a T‑beam, that is, a downstand beam, in which, depending on the planning and construction method, the supporting slab acts up to a certain width, see Image 03.

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#### Bending Beam in RFEM and RSTAB

With RFEM and RSTAB, Dlubal Software allows you to select any cross-section within the cross-section library, or to define and import them, see FAQ 004290.
A beam member that is set by default is typically used as a member type, which corresponds to the properties of the bending beam.
Another option, for example, for modeling T-beams, is the "Rib" member type.

• Rib
• T-beam
• Downstand beam
• Upstand beam

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 Views 215× Updated 06/22/2021

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