Second Order Analysis Options per Load Case

The standard analysis method in MasterFrame is a 1^st order linear elastic analysis. Where elements such as tension only members, no axial force members or spring restraints are included in a model the software automatically carries out an iterative analysis process to reflect the presence of these elements or restraints.

The Second order analysis option opens the Analysis Options pane, which opens in the right side of the window. When the pane opens, the software defaults to load case 001 and none of the available options are selected. The initial pane is shown below.

The available options are: -

1.Include P-delta Analysis – this enables a P-Δ analysis to be carried out on specific load cases, to account for the geometric deformation of a structure

2.Elastic Critical Load Factor – enable the calculation of the elastic critical load factor for specific load cases

3.Include Plastic Analysis – consider the formation of plastic hinges where members have been selected to have one or more plastic hinges

4.Timber Load duration – for use in conjunction with models which include timber members, the load duration sets the relevant K factor in the selected load cases.

At the foot of the pane, links are provided to quickly access other menu items. These include the Global Data, including material densities, coefficient of thermal expansion and live load reductions, Load Cases which opens the Loading Case Combinations menu. The Notional Loads navigates to the horizontal notional load menu.