Response Spectrum Analysis

A Response Spectrum Analysis has been added in v7.0 of SeismoStruct. Herein the users can choose in which directions the seismic components will be taken into consideration; by default all the directions, ±EX, ±EY, ±EZ, are selected. Further, the damping ratio of the model and which modes are to be taken into account according to the minimum effective modal mass, are defined. The default value of the damping ratio is 5%, whereas a threshold of 0.1% is set for the minimum effective modal mass of the modes to be considered.