en:clt:hotspot:software:cltdesigner:manual:modul_tbeam_new

Module "Ribbed slab"

Module Ribbed slab

The input is divided into:

  • general information about the project and the considered structural element
  • definitions of the structural system
  • definitions of the cross section
  • input of the loads
  • informations about vibration parameters
  • calculation options

The input field "General" defines the service class. It is only allowed to use CLT elements in areas of service class 1 and 2.

  • Service class 1 (interior service condition) is in general consistent with a common utilisation of living spaces.
  • Service class 2 (protected exterior service condition) is generally used for open but roofed structures.

Input - General - Service class

· 2017/11/14 17:11

In this release, only single span girder can be calculated. The supporting width and span (via x-value in the table) can be defined within this input field.

Input - structural system

The input of the CLT cross section (plate cross section) is the same as for the other Module. However, you can still select whether the plate is at the top or bottom.

Selecting the position of the plate

Show description

The rib cross-section (rectangular cross-section made of glulam or solid wood) is defined by entering the height and width of the rib and selecting the material. If "Standard dimensions only" is selected, the dimensions for the nearest standard cross-section are set.

Input - cross section of the rib

The input is the same as for the Module "CLT-Plate 1D - Continuous beam", but limited to distributed loads.

Show description

In this module, currently no structural fire design is possible.

The tab "Vibrations" allows for vibration verification.

Input - Vibrations

For the vibration verification the following specifications are of importance:

  • high or normal requirements? This choice will have an influence on the limit values.
  • modal damping factor
  • consideration of the screed (concrete topping) stiffness
    • thickness of the screed (concrete topping)
    • modulus of elasticity of the screed (concrete topping)
  • support (2-sided or 4-sided)
  • room width b perpendicular to the load carrying direction

The effective width bw of the chosen cross section used by the stiffness criteria will be specified.

· 2017/11/14 17:11

On the tab "cross-section values", the effective width, the center of gravity as well as the bending and shear stiffness of the T-beam at the supports and in between are shown.

Cross section values

The button can be used to display the stiffness values of the CLT panel, the glulam beam and the shear spring, which are the input parameters for determining the effective width.

Stiffness values of the CLT panel, the glulam beam and the shear spring

The summary of the results is analogous to the Module "CLT-Plate 1D - Continuous beam".

Show description

However, there are differences for ULS - shear, since for the CLT-flange also the in-plane shear has to be considered.

Summary of the results

  • en/clt/hotspot/software/cltdesigner/manual/modul_tbeam_new.txt
  • Last modified: 2024/10/10 17:33
  • by Alexandra Thiel