3.1.9. Beam Integration Command

This command is used to construct an integration object for certain beam elements. A wide range of numerical integration options are available in OpenSees to represent either distributed plasticity or concentrated plasticity within a single element such as the Force-Based Beam Column Element element.

beamIntegration $integtaionType $tag $arg1 ...

Argument

Type

Description

$integrationType

string

integration type

$tag

integer

unique beam integration tag.

$args

list

a list of arguments with number dependent on integration type

Following are beamIntegration types available in the OpenSees:

  1. Integration Methods for Distributed Plasticity. Distributed plasticity methods permit yielding at any integration point along the element length.

  1. Plastic Hinge Integration Methods. Plastic hinge integration methods confine material yielding to regions of the element of specified length while the remainder of the element is linear elastic. A summary of plastic hinge integration methods is found in (Scott and Fenves 2006).