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

M. Loli, I. Anastasopoulos, J. A. Knappett, M. J. Brown

    Research output: Chapter in Book/Report/Conference proceedingChapter

    6 Citations (Scopus)

    Abstract

    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.
    Original languageEnglish
    Title of host publicationPhysical Modelling in Geotechnics - Proceedings of the 8th International Conference on Physical Modelling in Geotechnics 2014, ICPMG 2014
    EditorsChristophe Gaudin, David White
    PublisherCRC Press
    Pages1073-1078
    Number of pages6
    Volume2
    ISBN (Electronic)9781315776873
    ISBN (Print)9781138022225, 9781138001527
    DOIs
    Publication statusPublished - 1 Jan 2014
    Event8th International Conference on Physical Modelling in Geotechnics, ICPMG 2014 - Perth, WA, Australia
    Duration: 14 Jan 201417 Jan 2014

    Conference

    Conference8th International Conference on Physical Modelling in Geotechnics, ICPMG 2014
    CountryAustralia
    CityPerth, WA
    Period14/01/1417/01/14

    Fingerprint

    Actuators
    Earthquakes
    Testing
    Bridge piers
    Soil structure interactions
    Highway bridges
    Centrifuges
    Experiments

    Cite this

    Loli, M., Anastasopoulos, I., Knappett, J. A., & Brown, M. J. (2014). Use of Ricker wavelet ground motions as an alternative to push-over testing. In C. Gaudin, & D. White (Eds.), Physical Modelling in Geotechnics - Proceedings of the 8th International Conference on Physical Modelling in Geotechnics 2014, ICPMG 2014 (Vol. 2, pp. 1073-1078). CRC Press. https://doi.org/10.1201/b16200-152
    Loli, M. ; Anastasopoulos, I. ; Knappett, J. A. ; Brown, M. J. / Use of Ricker wavelet ground motions as an alternative to push-over testing. Physical Modelling in Geotechnics - Proceedings of the 8th International Conference on Physical Modelling in Geotechnics 2014, ICPMG 2014. editor / Christophe Gaudin ; David White. Vol. 2 CRC Press, 2014. pp. 1073-1078
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    Loli, M, Anastasopoulos, I, Knappett, JA & Brown, MJ 2014, Use of Ricker wavelet ground motions as an alternative to push-over testing. in C Gaudin & D White (eds), Physical Modelling in Geotechnics - Proceedings of the 8th International Conference on Physical Modelling in Geotechnics 2014, ICPMG 2014. vol. 2, CRC Press, pp. 1073-1078, 8th International Conference on Physical Modelling in Geotechnics, ICPMG 2014, Perth, WA, Australia, 14/01/14. https://doi.org/10.1201/b16200-152

    Use of Ricker wavelet ground motions as an alternative to push-over testing. / Loli, M.; Anastasopoulos, I.; Knappett, J. A.; Brown, M. J.

    Physical Modelling in Geotechnics - Proceedings of the 8th International Conference on Physical Modelling in Geotechnics 2014, ICPMG 2014. ed. / Christophe Gaudin; David White. Vol. 2 CRC Press, 2014. p. 1073-1078.

    Research output: Chapter in Book/Report/Conference proceedingChapter

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    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.

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    Loli M, Anastasopoulos I, Knappett JA, Brown MJ. Use of Ricker wavelet ground motions as an alternative to push-over testing. In Gaudin C, White D, editors, Physical Modelling in Geotechnics - Proceedings of the 8th International Conference on Physical Modelling in Geotechnics 2014, ICPMG 2014. Vol. 2. CRC Press. 2014. p. 1073-1078 https://doi.org/10.1201/b16200-152