Main Control Data

Automatically constrains the rotational DOF when elements without rotational DOF are used.

Auto Normal Rotation Constraint for Plane Elements

Automatically constrains the rotational DOF about the axis perpendicular to the plane of a plate element in order to remove unnecessary buckling modes that can occur in a plate element without out-of-plane rotational stiffness. This option is not applicable to a plate element with out-of-plane rotational stiffness.

Tension/Compression Truss Element (Elastic Link/Inelastic Spring) [Details...]

If a truss element or a tension-only/compression-only elastic link element is used, the program automatically iterates the linear analysis, as shown in the left flow chart, to find a solution.

The tension-only/compression-only elements that are applicable to this function are as follows:

Compression-only/Tension-only Truss Element

Compression-only/Tension-only Elastic Link

Compression-only/Tension-only Point Spring Support

Since the stiffness of the nonlinear members is influenced by the analysis result, the stiffness and the member forces should be determined by iterative analysis.

The analysis result using the nonlinear members cannot be linearly combined with other load cases. When the combined result is required, the load combination using the nonlinear members should be applied as a single load case and the analysis should be performed independently.

Create Load Cases using Load Combinations is used to create a new load case using the predefined load combination that was generated using several load cases.

Number of Iterations/Load Case: Enter the maximum number of iterations used to determine the converged condition for each load case.

The degree of convergence of the result due to iterative nonlinear analysis is expressed in terms of displacement. If the Displacement error norm is less than the Convergence Tolerance, the analysis result is considered to be convergent.

Consider Section Stiffness Scale Factor for Stress Calculation

Use the section properties reflecting the scale factors, which were defined in Section Stiffness Scale Factor, for stress calculations. Default is checked off.

Select whether or not to consider the increase or decrease in section stiffness for stress calculations. Even if the section stiffness changes, it is common to use the gross section for stress calculations. Thus, the default is checked off.

Transfer Reactions of Slave Nodes to the Master Node

When this option is checked on, reactions of slave nodes are plotted as zero and total reactions including reactions of slave nodes are plotted in the Summation field of the Reactions Table. When this option is checked off, reactions of slave nodes are plotted in the reaction field of the corresponding slave node.

Auto Constraint for Wall Elements Connectivity

When there are nodes not connected to the wall elements on the top or bottom of wall edges, midas Gen can automatically generates Linear Constraints by checking on this option. DOFs of free nodes are restrained to that of wall nodes.