Use of Ricker wavelet ground motions as an alternative to push-over testing

TY - CHAP

T1 - Use of Ricker wavelet ground motions as an alternative to push-over testing

AU - Loli, M.

AU - Anastasopoulos, I.

AU - Knappett, J. A.

AU - Brown, M. J.

PY - 2014/1/1

Y1 - 2014/1/1

N2 - When conducting studies of seismic soil-structure interaction, it is useful to be able to define the pseudo-static 'push-over' response of the structure under static horizontal loads representing the structural inertia. Normally, this would require separate centrifuge experiments with horizontal actuators attached. This paper describes an alternative procedure, using a specific type of ground motion (a Ricker wavelet) to obtain the push-over response, thereby allowing both this and the response to conventional earthquake shaking to be determined using the same (earthquake) actuator. Application of this technique to a 1: 50 scale model highway bridge pier with two different shallow foundations is presented. The moment rotation ('backbone') behaviour of the footings was accurately determined to large rotations, as verified though independent 3-D non-linear finite element modelling. Ricker wavelet ground motions are therefore shown to be a useful tool for the identification of push-over system behaviour without requiring additional actuators.

AB - When conducting studies of seismic soil-structure interaction, it is useful to be able to define the pseudo-static 'push-over' response of the structure under static horizontal loads representing the structural inertia. Normally, this would require separate centrifuge experiments with horizontal actuators attached. This paper describes an alternative procedure, using a specific type of ground motion (a Ricker wavelet) to obtain the push-over response, thereby allowing both this and the response to conventional earthquake shaking to be determined using the same (earthquake) actuator. Application of this technique to a 1: 50 scale model highway bridge pier with two different shallow foundations is presented. The moment rotation ('backbone') behaviour of the footings was accurately determined to large rotations, as verified though independent 3-D non-linear finite element modelling. Ricker wavelet ground motions are therefore shown to be a useful tool for the identification of push-over system behaviour without requiring additional actuators.

UR - https://www.scopus.com/pages/publications/84890055196

U2 - 10.1201/b16200-152

DO - 10.1201/b16200-152

M3 - Chapter

AN - SCOPUS:84890055196

SN - 9781138022225

SN - 9781138001527

VL - 2

SP - 1073

EP - 1078

BT - Physical Modelling in Geotechnics - Proceedings of the 8th International Conference on Physical Modelling in Geotechnics 2014, ICPMG 2014

A2 - Gaudin, Christophe

A2 - White, David

PB - CRC Press

T2 - 8th International Conference on Physical Modelling in Geotechnics, ICPMG 2014

Y2 - 14 January 2014 through 17 January 2014

ER -