Evaluation of Seismic Energy in Structures with Rigid-End Offsets
Publication: Structures Congress 2008: 18th Analysis and Computation Specialty Conference
Abstract
A computational algorithm based on nonlinear dynamic method of analysis is derived to evaluate the local seismic energy response of structures with rigid-end offsets and deformable panel zones. This algorithm is based on the force analogy method, which uses a change in displacement field to represent the nonlinear behavior of the structure instead of the traditional method of changing stiffness. The element stiffness matrices is enhanced to incorporate the effects due to rigid-end offsets of each structural member, and a rotational spring model is tailored to include panel zone deformation at each joint. To demonstrate the applicability of the proposed numerical procedure, a six-story moment-resisting frame with active control based on the optimal linear control algorithm is used as the illustrative example. Comparison of energy response is presented for cases: (1) with and without considerations of rigid-end offsets in the derivation of the stiffness matrices; (2) with and without accounting for panel zone deformation in the model; and (3) with and without the use of active control.
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Copyright
© 2008 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Algorithms
- Continuum mechanics
- Deformation (mechanics)
- Earthquake engineering
- Engineering fundamentals
- Engineering mechanics
- Geotechnical engineering
- Mathematics
- Nonlinear analysis
- Nonlinear response
- Seismic effects
- Seismic tests
- Solid mechanics
- Stiffening
- Structural analysis
- Structural behavior
- Structural engineering
- Structural mechanics
- Tests (by type)
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