A Finite Element Model For Seismic Response Analysis Of Deformable Rocking Frames

Keywords

FE modeling; overturning stability; rocking structures; seismic isolation; uplifting structures

Abstract

A new finite element model to analyze the seismic response of deformable rocking bodies and rocking structures is presented. The model comprises a set of beam elements to represent the rocking body and zero-length fiber cross-section elements at the ends of the rocking body to represent the rocking surfaces. The energy dissipation during rocking motion is modeled using a Hilber–Hughes–Taylor numerically dissipative time step integration scheme. The model is verified through correct prediction of the horizontal and vertical displacements of a rigid rocking block and validated against the analytical Housner model solution for the rocking response of rigid bodies subjected to ground motion excitation. The proposed model is augmented by a dissipative model of the ground under the rocking surface to facilitate modeling of the rocking response of deformable bodies and structures. The augmented model is used to compute the overturning and uplift rocking response spectra for a deformable rocking frame structure to symmetric and anti-symmetric Ricker pulse ground motion excitation. It is found that the deformability of the columns of a rocking frame does not jeopardize its stability under Ricker pulse ground motion excitation. In fact, there are cases where a deformable rocking frame is more stable than its rigid counterpart. Copyright © 2016 John Wiley & Sons, Ltd.

Publication Date

3-1-2017

Publication Title

Earthquake Engineering and Structural Dynamics

Volume

46

Issue

3

Number of Pages

447-466

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1002/eqe.2799

Socpus ID

84983527498 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84983527498

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