FAQ 001485 ZH

计算 DYNAM Pro - Equivalent Loads RF-DYNAM Pro - Equivalent Loads

Because I have to design a very irregular structural system for earthquakes, I would like to know if RFEM performs the so-called modal analysis (considering several mode shapes) automatically on the spatial system, or if it needs a special setting.

回答

The equivalent loads are determined according to the modal response spectrum method. To find out how many mode shapes must be considered, it is useful to calculate the equivalent mass factors in module window 1.6 additionally, because it is basically recommended to take as many modal shapes that the sum of the effective equivalent masses is at least 90 % of the effective total mass.

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RSTAB 动力分析
DYNAM Pro - Equivalent Loads 8.xx

附加模块

使用多振型反应谱分析方法计算动力和地震等效荷载

RFEM 动力分析
RF-DYNAM Pro - Equivalent Loads 5.xx

附加模块

使用多振型反应谱分析方法计算动力和地震等效荷载