ESR-7-01

Quantitative Geotechnical Characterization of Seismic Strengthening Effect on Subaquatic Slope Stability

Ting-Wei Wu | Marum

Research

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.

Methods

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.

References

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. https://doi.org/10.1007/978-90-481-3071-9_3

Hosting institute
 
       
Working Group
  • Marine Geotechnics
Supervisor
PDP Committee members:

TEAM

Ting-Wei Wu
PhD student – ESR 7
tingweiwu@marum.de
Achim Kopf
Principal Investigator – ESR 7
akopf@marum.de

BLOGS

2019 | 2018 |

2019

24/12/19
Ting-Wei’s secondments
@ NGI and IFREMER (second term)
ESR 7, News, Secondments
 

Ting-Wei went back to NGI (1 month) and IFREMER (2 months) to complete her demanding series of cyclic and monotonic triaxial tests, and to work on a manuscript.

23/09/19
921 (ChiChi) Earthquake 20th anniversary special topic
ESR 7, Miscellaneous, News
 

Ting-Wei translated a video that reviewed the “921 Earthquake” in Taiwan, and how the Taiwanese people progressed in the passed 20 years.
23/07/19
Impressions from the EGU 2019
@ Vienna, Austria (07 – 12 April 2019)
Conferences, ESR 1, ESR 12, ESR 13, ESR 14, ESR 15, ESR 2, ESR 3, ESR 4, ESR 5, ESR 6, ESR 7, ESR 8, ESR 9, News
 

ESRs share their experience at the EGU General Assembly 2019 hosted in Vienna, Austria. Posters, oral presentations, PICOs and much more.

10/07/19
Report of Ting-Wei’s 2nd secondment
@ NGI, Oslo, Norway
ESR 7, News, Secondments
 

Read about Ting-Wei’s experience of conducting cyclic triaxial tests in the world-famous geotechnical lab of the Norwegian Geotechnical Institute (NGI) during her secondment in May and June, 2019.

2018

04/12/18
GLOMAR – the Bremen International Graduate School of Marine Sciences
Courses, ESR 11, ESR 7, ESR 9, News
 

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!
18/06/18
Review of ECORD Training Course 2018
@ MARUM, Bremen, Germany
ESR 11, ESR 2, ESR 3, ESR 4, ESR 6, ESR 7, ESR 9, News
 

From 23rd to 27th April, a group of seven SLATE ESRs participated in the ECORD Training Course 2018, which took place at MARUM – Center for Marine Environmental Sciences, Bremen. This one-week course provided a “Virtual Ship Experience” and prepared the young researchers for sailing in an offshore drillship expedition.