Abstract
Single-degree-of-freedom constitutive relations aimed at modeling the mechanical response of seismic isolators, specifically lead-core bearing devices and elastomeric bearings, are discussed in this contribution. Two constitutive models are considered. For the lead-core bearings, a model that defines the relation between the shear displacement and the generated shear force is postulated. This model involves a hysteresis parameter the evolution of which is separately defined. The mechanical behavior of the elastomeric bearings I s modeled assuming a constitutive law that takes into account several interacting mechanisms including the mechanical damage accumulation. Numerical procedures are developed for both constitutive relations. These numerical procedures are to be implemented in detailed finite element models and accurate finite element analysis of base-isolated structures.
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Zhelyazov, T. (2019). Single-Degree-of-Freedom Analytical Predictive Models for Seismic Isolators. In: Rupakhety, R., Olafsson, S., Bessason, B. (eds) Proceedings of the International Conference on Earthquake Engineering and Structural Dynamics. ICESD 2017. Geotechnical, Geological and Earthquake Engineering, vol 47. Springer, Cham. https://doi.org/10.1007/978-3-319-78187-7_14
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