ABAQUS Keywords Reference Manual  

*REBAR LAYER
Define layers of reinforcement in membrane, shell, surface, and continuum elements.

This option is used to define one or multiple rebar layers in membrane, shell, and surface elements. It must be used in conjunction with the *MEMBRANE SECTION, the *SHELL SECTION, or the *SURFACE SECTION option. Rebar layers in solid (continuum) elements can be defined by embedding a set of surface or membrane elements with rebar layers in a set of host continuum elements through the use of the *EMBEDDED ELEMENT option.

Products: ABAQUS/Standard  ABAQUS/Explicit  

Type: Model data

Level: Part  Part Instance  

References:

Optional parameters:

ANGULAR SPACING

This parameter is meaningful only for rebar with varying spacing in axisymmetric membrane, axisymmetric shell, or axisymmetric surface elements. Include this parameter if the spacing of the rebar is being given as an angular spacing in degrees instead of being given as a length measure on the data lines.

ORIENTATION

This parameter is meaningful only for rebar in general shell, membrane, and surface elements. Set this parameter equal to the name of an orientation definition that defines the angular orientation of the rebar on the data lines. If this parameter is omitted, the angular orientation of rebar on the data lines is specified relative to the default projected local surface directions. This parameter is not permitted with axisymmetric shell, axisymmetric membrane, and axisymmetric surface elements.

Data lines to define rebar layers: 

First line:

  1. A name that will be used to identify this rebar layer. This name can be used in defining rebar prestress and output requests. Each layer of rebar must be given a separate name in a particular element or element set.

  2. Cross-sectional area of the rebar.

  3. Spacing of rebar in the plane of the membrane, shell, or surface element. This value should be given in terms of angular spacing in degrees if the ANGULAR SPACING parameter is specified.

  4. Position of the rebar in the shell section thickness direction. This value is given as the distance of the rebar from the middle surface of the shell, positive in the direction of the positive normal to the shell. This value is modified if the NODAL THICKNESS parameter is included with the *SHELL SECTION option for the underlying shell element. This entry has no meaning for rebar in either membrane or surface elements.

  5. Name of the material forming this rebar layer.

  6. For three-dimensional shell, membrane, and surface elements, specify the angular orientation of rebar (in degrees) between the positive local 1-direction and the rebar. The local 1-direction can be defined by using the *ORIENTATION option and setting the ORIENTATION parameter equal to the orientation name. If the ORIENTATION parameter is omitted, the local 1-direction is defined by the default projected local surface directions. The optional ORIENTATION parameter given on the *MEMBRANE SECTION and the *SHELL SECTION options has no influence on the rebar angular orientation.

    For axisymmetric shell, axisymmetric membrane, and axisymmetric surface elements, specify the angular orientation of rebar from the meridional plane in degrees (0° is meridional, 90° is circumferential). Positive rotation is about the positive normal to the shell, membrane, or surface elements.

  7. The isoparametric direction from which the rebar angle output will be measured. The default is 1.

Repeat this data line as often as necessary. Each line defines a layer of rebar.