The assignment of combination cases is both an integral and powerful feature of CADEcomp.
This process enables base load case e.g. DL, LL's., to be combined together automatically reducing input requirements and errors.
The way base loads are combined is primarily controlled by the code selected in the LC (load combination) list but there are other methods which provide greater flexibility.
Each load line, requires the setting or selection of 'rule' that is to be applied.
(Although this rule generally applies to the 'addition' of 2 base cases, more complex cases can be developed using the 'DLD' (detailed Load Definitions) editor.)
To select the rule to be applied, use the drop down list provided.
By default, 'A' is used. This means that all available base case conditions assigned are combined.
For example, if 'RL1' has 4 base cases assigned, eg., DL, LL, WLdn, WLup the combination cases DL, DL+LL, DL+WLup, DL+WLdn will be generated.
If you wish to assign only specific cases, use the drop down list to assign the case to consider.
For example, if the load condition 'RL1' gas the following assigned
and we wish to consider the case DL+WLdn only, we need only to select the case required (in this example '3')
which gives us the result
The combination rules 'D', 'M' and 'S' provide for complex (and powerful) load pattern generation with the following options.
'D' = Dynamic - the load is treated as a moving load with discrete calculation at each loading location.
'M' = Multiple - multiple loads (reactions) applied separately to a common member.
'S' = Static - load patterns are applied to alternate loading locations