Implications of vertical mass modeling errors on 2D dynamic structural analysis - Printable Version +- Civil Engineering Association (https://forum.civilea.com) +-- Forum: eBooks (https://forum.civilea.com/forum-63.html) +--- Forum: Journals, Papers and Presentations (https://forum.civilea.com/forum-74.html) +--- Thread: Implications of vertical mass modeling errors on 2D dynamic structural analysis (/thread-40662.html) |
Implications of vertical mass modeling errors on 2D dynamic structural analysis - asim99 - 12-29-2012 Implications of vertical mass modeling errors on 2D dynamic structural analysis Author: TIMOTHY M. WHALEN, GRAHAM C. ARCHER AND KISHOR M. BHATIA | Size: 520 KB | Format: PDF | Quality: Unspecified | Publisher: TIMOTHY M. WHALEN, GRAHAM C. ARCHER AND KISHOR M. BHATIA | Year: 2004 | pages: 10
The use of diagonal (lumped) mass matrices is common in dynamic structural analysis. The assumptions made when performing the lumping procedure, however, are not always consistent with the underlying physical behavior and can therefore modify the dynamic properties of the modeled structure. The influence of errors in mass modeling for vertical degrees of freedom on dynamic behavior and seismic response is illustrated. We demonstrate that overestimation of the lumped masses associated with vertical displacements in 2D frame models of these structures leads to inaccurate modal periods and associated modal participation factors for dynamic response. The ramifications of these inaccuracies on seismic response are shown and implications in other dynamic analysis situations are discussed. Code: *************************************** |