Quantitative Geotechnical Characterization of Seismic Strengthening Effect on Subaquatic Slope Stability

Ting-Wei Wu | Marum


This project consists in a laboratory based, generic study that aims at quantifying the strengthening effect of earthquake loading on marine slope sediment deposits. The main goal is to explore the nature and significance of seismic strengthening in sediments of different mineralogical and grain size compositions. Expected scientific outcome is to enhance our understanding of:

  • Seismic strengthening of granular material and its dependence on parameters such as the seismic intensity, number of seismic events and overburden stresses.
  • Seismic strengthening of geotechnically more complex types of soils, for example silts, clays, sand-silt-clay mixtures, tephra, and diatom ooze.
  • Case study on natural samples incorporating real earthquake signals.


The MARUM Dynamic Triaxial Testing Device (description in Kreiter et al., 2010) is the essential apparatus to investigate marine sediment’s shear strength under static and cyclic loading conditions. Cyclic tests are carried out on different kinds of samples and will also be complemented using machines at Ifremer, NGI or Fugro laboratories during the secondments (extended research stays). Additional geotechnical methods to fully characterize the tested materials will also be used.


Kreiter, S., Moerz, T., Strasser, M., Lange, M., Schunn, W., Schlue, B.F., Otto, D., Kopf, A., 2010. Advanced Dynamic Soil Testing — Introducing the New Marum Dynamic Triaxial Testing Device, in: Submarine Mass Movements and Their Consequences, Advances in Natural and Technological Hazards Research. Springer, Dordrecht, pp. 31–41.

Hosting institute
Working Group
  • Marine Geotechnics


Ting-Wei Wu
PhD student – ESR 7
Achim Kopf
Principal Investigator – ESR 7


Report of Ting-Wei’s 1st secondment
@ IFREMER, Brest, France

ESR 7, News, Secondments | 2019-01-16

In late October 2018, Ting-Wei (ESR7) visited IFREMER in Brest, France to do dynamic triaxial experiments on Ottawa Sand to assess her research topic of seismic strengthening.

Raising Awareness of Hazard Studies –
are we aware of the risks?

ESR 7, Miscellaneous, News | 2018-12-11

Natural hazards linked to earthquakes, landslides and tsunamis are not uniformly distributed around the globe – and thus are perceived rather differently by people. Ting-Wei (ESR 7) addresses this issue from a Taiwanese point of view to raise the public awareness of the relevance of hazard studies.

GLOMAR – the Bremen International Graduate School of Marine Sciences
Courses, ESR 11, ESR 7, ESR 9, News | 2018-12-04

Graduate schools can provide PhD students valuable support in a variety of ways. In this blog, Ting-Wei (ESR 7), Ricarda (ESR 9) and Monika (ESR 11) introduce GLOMAR, the international graduate school for marine sciences in Bremen. Read more about networking opportunities, seminars and offered courses!