Data set from shake table tests of free-standing rocking bodies

Michalis F Vassiliou,Luiza Dihoru,George Mylonakis,Marco Broccardo,Bozidar Stojadinovic,Matt Dietz,Cihan Cengiz,Anastasios Sextos

doi:10.1177/87552930211020021

Michalis F Vassiliou, Luiza Dihoru + Show 6 more

Open Access

https://doi.org/10.1177/87552930211020021

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Abstract

In earthquake engineering, structural models are validated by performing a time history analysis and comparing its maximum to the maximum response obtained by a shake table test. It has been shown that this is a sufficient (but not a necessary) precondition to accept a numerical model. Numerical models can fail to predict the planar rocking response of a rigid block, but may succeed in predicting the statistics of the response to an ensemble of ground motions. As seismic response is inherently stochastic, comparison of the statistics of the numerically simulated response to the statistics of the experimentally obtained benchmark response for the same ensemble of earthquake excitation is a sufficient (and easier to pass) model validation test. This article describes the publicly available data of a set of 12 free rocking vibration and 115 shake table tests of six three-dimensional rocking and sliding columns, designed at ETH Zurich and performed at EQUALS Laboratory, University of Bristol. The data can be used to statistically validate different approaches that aim to model three-dimensional rocking structures.

Highlights

Rocking structures are not fixed to the ground, but can uplift and sustain a strongly nonlinear motion
Until recently, it was believed that rocking motion is unpredictable by analytical or numerical models, because numerical models often failed to reproduce the experimental data available in the literature (Aslam et al, 1980; Drosos and Anastasopoulos, 2014; ElGawady et al, 2011; Kalliontzis and Sritharan, 2018; Lipscombe and Pellegrino, 1993; Ma, 2010; Mouzakis et al, 2002; Pena et al, 2007; Priestley et al, 1978), especially when it comes to seismic response
The data can be used for the statistical validation of numerical models of the seismic response of free-standing rocking bodies, and complements corresponding data for a wobbling podium structure

Summary

Introduction

Rocking structures are not fixed to the ground, but can uplift and sustain a strongly nonlinear motion. For tests that are not repeatable, this is the only possible way that numerical models can be validated This data article contains the results of multiple shake table tests of free-standing rocking bodies designed at ETH Zurich and fabricated at the University of Bristol. The data can be used for the statistical validation of numerical models of the seismic response of free-standing rocking bodies, and complements corresponding data for a wobbling podium structure. The latter is a structure that is allowed to uplift and rock along different directions on horizontal plane, but mechanically restrained not to step out of its original position (Vassiliou et al, 2021a).

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