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FEMA 451B Topic 4 NotesMDOF Dynamics 4 - 1 Instructional Material ComplementingFEMA 451, Design ExamplesMDOF Dynamics 4 - 1 Structural Dynamics of Linear Elastic Multiple-Degrees-of -Freedom (MDOF) Systemsu1u2u3 This topic covers the analysis of Multiple-Degrees-of -freedom (MDOF) Elastic systems. The basic purpose of this series of slides is to provide background on the development of the code-based equivalent lateral force (ELF) procedure and modal superposition analysis. The topic is limited to two-dimensional 451B Topic 4 NotesMDOF Dynamics 4 - 2 Instructional Material ComplementingFEMA 451, Design ExamplesMDOF Dynamics 4 - 2 Structural Dynamics of ElasticMDOF Systems Equations of motion for MDOF systems Uncoupling of equations through use of natural mode shapes Solution of uncoupled equations Recombination of computed response Modal response history analysis M
Vertical and rotational masses not required, 2. Horizontal mass may be lumped into the floors, and 3. Diaphragms (floors) are axially rigid. ... subjected to an independent time varying load at DOF 1, 2, and 3. The purpose of this slide is to illustrate the advantages of …
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