MacroModel evaluation

For the evaluation of the modal response characteristics - deformations and internal forces - using macromodels (see section FE Modeling of LBM Structures for Seismic Analysis ), the square root of the sum of squares combination mle of modal quantities can be used if the modes differ with each other by as much as 90 %, or, better, using the complete quadratic combination rule, giving accurate maxima for closely coupled mode combinations. For seismic modal analyses using micromodels (e.g., shell finite elements), the peak response characteristics (deformations and internal stresses) max should be evaluated following ... 

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