A new section has been implemented within the dialogue box where the selected seismic code parameters are defined (Job > General data > Select With seismic loading > Choose a seismic code): Number of vibration modes considered in the analysis. Here, the program offers different ways to establish the number of vibration modes to be considered in the seismic analysis of the structure:
- Based on the Code
The analysis is carried out in accordance with that specified in the selected seismic code. This section may not exist if the selected seismic code does not specify this data. - Automatic, until a required percentage of displaced mass is reached
Users define the minimum percentage of accumulated modal mass that is required to be displaced in each direction. - Specified by the user
Users indicate the number of vibration modes based on their own judgement. Until now, this was how the number of vibration modes was indicated for the seismic analysis, where users had to choose the value bearing in mind the requirements of the selected code, the structure to be analysed and/or their own considerations.
