RSIMP is an add-on module for RSTAB that generates equivalent geometric imperfections (i.e. loads according to DIN 18800) to respect drift and camber of compression members. Alternatively, pre-deformed initial structures are created for RSTAB according to the dynamic eigenvalues, buckling modes or deformations of RSTAB load cases.
Taking into account the imperfections in a 2nd order theory analysis, the user can judge the influence of a structure's imperfections which result in additional horizontal loads or additional bending moments in columns.
The advantage of equivalent geometric imperfections is that it is possible to work with a perfect geometry of the model and still to carry out a safe design including its imperfections. Simultaneously, the buckling design can be settled for any section by a 2nd order theory calculation.

Program Features

• Generation of equivalent geometric imperfections or of a pre-deformed initial structure based on the displacements of a calculated RSTAB load case (often the most unfavorable direction)
• Generation of equivalent geometric imperfections or of a pre-deformed initial structure based on RSBUCK buckling mode (often the significant direction for buckling)
• Generation of equivalent geometric imperfections or of a pre-deformed initial structure based on a DYNAM Basic eigenvalue (dynamic mode)
• Determination of drift and camber conforming to standards and to the buckling stress curves of the cross-sections
• Simple adoption of the imperfections as a specific load case in RSTAB