Sensitivity analysis of frame structures (virtual distortion method approach)

A novel approach to sensitivity analysis of frame structures based on the virtual distortion method (VDM) has been presented. The sensitivity analysis has been performed for elasto-plastic material behaviour with respect to selected structural parameters e.g. cross-sectional area, hardening=softening coe cient and yield stress. Advantages of applying the virtual distortion method to sensitivity analysis have been emphasised i.e. making use of the so-called in uence matrix, constant for the whole analysis and solving only local sets of equations corresponding to plastic locations. Theoretical background as well as the whole variety of examples has been presented