Main Control Data






Enter the basic boundary conditions for elements and the analysis conditions for nonlinear elements. By checking on "Consider Section Stiffness Scale Factor for Stress Calculation". section stiffness variation can be considered for stress calculation. 







From the Main Menu select Analysis > Main Control > Main Control Data. 





Auto Rotational DOF Constraint for Truss/Plane Stress/Solid ElementsAutomatically constrains the rotational DOF when elements without rotational DOF are used. Auto Normal Rotation Constraint for Plane ElementsAutomatically 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 outofplane rotational stiffness. This option is not applicable to a plate element with outofplane rotational stiffness. Tension/Compression Truss Element (Elastic Link/Inelastic Spring)
Number of Iterations/Load Case: Enter the maximum number of iterations used to determine the converged condition for each load case. Convergence Tolerance: Enter the convergence tolerance.
Note 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 CalculationUse the section properties reflecting the scale factors, which were defined in Section Stiffness Scale Factor, for stress calculations. Default is checked off.
Note 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
Transfer reactions of Slave Nodes to the Master Node. Default is checked on.
Note 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.
Consider Reinforcement for Section Stiffness Calculation Consider the reinforcement entered into a PSC section for section stiffness calculation. When this option is checked off, the reinforcement will not be considered for the section stiffness calculation. Default is Check Off. For design, the reinforcement is considered for the section stiffness calculation regardless of whether the option is checked or not. When shear steel bar is entered, the reinforcement is considered for the section stiffness calculation regardless of whether the option is checked or not. The stresses in PSC beam section defined with shear steel bar are produced as sigxz (bar) in Beam Stresses (PSC). Change Local Axis of Tapered Section for Force/stress Calculation When the section offset of tapered section is specified as top or bottom of the section, the member forces and stresses can be obtained along with the local axis parallel to the offset line. This option is useful when the user wants to obtain the vertical forces parallel to the gravity direction in tapered section.
(a) when the option is checked off (b) when the option is checked on Change Local Axis of Tapered Section for Force/stress Calculation option 

