Modeling of shear yielding members for seismic energy dissipation

Date

2004-08-01

Author

Sarıtaş, Afşin

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Structural members yielding in shear are used in earthquake resistant systems, such as eccentrically braced steel frames and systems with passive energy dissipation devices, in a conscious effort to concentrate the energy dissipation capacity of the structure in components that can be repaired or replaced after a major earthquake. The simulation of the energy dissipation capacity of these components is important in the evaluation of the seismic response of these structural systems. This paper presents a new beam element for the simulation of the hysteretic behavior of shear-yielding members. The element is based on a three-field variational formulation with independent force, displacement and deformation fields. The displacement field is based on Timoshenko's shear beam theory. The nonlinear response of the element arises from the integration of biaxial stress-strain relations over several control sections along the element length. The biaxial material model accounts for the interaction between normal and shear stress. While previous concentrated plasticity models involve parameter tuning for different loading and support conditions, the proposed model is general in its derivation of the axial force-shear-flexure interaction from the material response. The proposed model shows the characteristic advantages of force-based beam elements and is capable of simulating the inelastic response of short beams with a single element without suffering from shear locking. The effect of shear is significant in these members during the elastic and inelastic response. The ability of the model to accurately represent the hysteretic behavior of short shearyielding members is ascertained with correlation studies of analytical results with available experimental data from shear-link experiments.

URI

https://hdl.handle.net/11511/72293

Conference Name

13th World Conference on Earthquake Engineering (1 - 6 Ağustos 2004)

Collections

Department of Civil Engineering, Conference / Seminar

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Citation Formats

A. Sarıtaş, “Modeling of shear yielding members for seismic energy dissipation,” presented at the 13th World Conference on Earthquake Engineering (1 - 6 Ağustos 2004), Vancouver, Canada, 2004, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/72293.