Pushover Analysis for RFEM 6

• Consideration of nonlinear component behavior using plastic standard hinges for steel (FEMA 356, EN 1998‑3) and nonlinear material behavior (masonry, steel - bilinear, user-defined working curves)
• Direct import of masses from load cases or combinations for the application of constant vertical loads
• User-defined specifications for the consideration of horizontal loads (standardized to a mode shape or uniformly distributed over the height of the masses)
• Determination of a pushover curve with selectable limit criterion of the calculation (a collapse or limit deformation)
• Transformation of the pushover curve into the capacity spectrum (ADRS format, single degree of freedom system)
• Bilinearization of the capacity spectrum according to EN 1998‑1:2010 + A1:2013
• Transformation of the applied response spectrum into the required spectrum (ADRS format)
• Determination of target displacement according to EC 8 (the N2 method according to Fajfar 2000)
• Graphical comparison of the capacity and required spectrum
• Graphical evaluation of the acceptance criteria of predefined plastic hinges
• Result display of the values used in the iterative calculation of the target displacement
• Access to all results of the structural analysis in the individual load levels

During the calculation, the selected horizontal load is increased in load steps. A static nonlinear analysis is carried out for each load step until reaching the specified limit condition.

The results of the pushover analysis are extensive. On one hand, the structure is analyzed for its deformation behavior. This can be represented by a force-deformation line of the system (a capacity curve). On the other hand, the response spectrum effect can be displayed in the ADRS display (Acceleration-Displacement Response Spectrum). The target displacement is automatically determined in the program based on these two results. The process can be evaluated graphically and in tables.

The individual acceptance criteria can then be graphically evaluated and assessed (for the next load step of the target displacement, but also for all other load steps). The results of the static analysis are also available for the individual load steps.