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KB 001833 | Using Nonlinearities in Response Spectrum Analysis in RFEM 6
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Both the determination of natural vibrations and the response spectrum analysis are always performed on a linear system. If nonlinearities exist in the system, they are linearized and thus not taken into account. They are caused by, for example, tension members, nonlinear supports, or nonlinear hinges. This article shows how you can handle them in a dynamic analysis.
Dlubal Knowledge Base Dynamic Analysis Earthquake Response Spectrum Modal Response Natural Vibration Nonlinearity Tension Member Dlubal KB KNOWLEDGE BASE Technical article construction Civil Engineering Structural engineer Structural Design Structural Engineer Structural analysis RFEM 6 RSTAB 9 Dlubal Software
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This article shows how to deal with nonlinearities in a response spectrum analysis.
Comparing Axial Forces in Tension Members: Without Considering (Left) and with Considering Nonlinearity (Right)
Comparing Total Earthquake Force: Without Considering (Left) and with Considering Nonlinearity (Right)