Stress trajectories element method for stress determination from discrete data on principal directions

Irša, J.; Galybin, A.N.

doi:10.1016/j.enganabound.2009.12.004

Cited by 10 publications

(12 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two regions, affected by similar events, have been analysed using the modification of the STEM technique developed earlier [3]. The first one was the region where the great Sumatran earthquake (26.12.2004, 9.1M) happened.…”

Section: Discussionmentioning

confidence: 99%

“…The collocation points placed on the DEI assume continuity of the complex potentials, while the collocation points on BEI assume continuity of the stress vector. The previous approach [3] assumed continuity of two potentials ) ( ' ), ( z z   across the adjacent elements, the subdomain boundaries have not been taken into account. As a result only the complex-valued stress deviator function (resp.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…The motivation of this study is to investigate the changes in tectonic stress fields induced by the 26.12.2004 event and also analyse the region where the Japan earthquake occurred, based on the developed numerical method, STEM [3]. The first area for the analysis is the Sunda trench region where data before and after the event are available.…”

Section: Introductionmentioning

confidence: 99%

“…The numerical algorithm is based on the previous study [3] but it has been significantly modified in order to take the multiple plate margins into account. Using the modified STEM approach we determine not only the stress state inside the tectonic plates but also the boundary forces on the tectonic plates.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

On STEM of tectonic stress fields in tsunami regions

Irša¹,

Galybin²

2011

Boundary Elements and Other Mesh Reduction Methods XXXIII

View full text Add to dashboard Cite

We apply the STEM (Stress Trajectories Element Method) to investigate changes in the stress states as a result of a great earthquake. Two regions are considered: 1) the region affected by the great Sumatran earthquake (26 th of December 2004, 9.1M), taking into account data collected before and after the event separately; 2) the region where the recent Japanese earthquake (11 th of March 2011, 9.0M) occurred. The latter is analysed taking into account data collected before the event only while the former case allows one to consider the changes in data due to the significant increase of measurements since the 2004 event. The analysis is based on the stress orientation data from the World Stress Map (WSM) database and the geometrical model of tectonic plate boundaries. The method has proved to be able to recover the stress fields from this type of data with satisfactory accuracy. The modelling utilizes the Trefftz type approach for the complex potentials in plane elastic problems and assumes continuity of the stress vector across the tectonic plate boundaries. As a result of the modelling we obtain stress trajectories, maximum shear stress and mean stress, and the plate driving forces expressed in terms of normal and tangential stresses. The results for the two time subsets revealed changes in the stress patterns induced by the 26/12/2004 event and moreover the stress pattern before the great Sumatran Earthquake was very similar to the one near Japan.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On STEM of tectonic stress fields in tsunami regions

Irša¹,

Galybin²

2011

Boundary Elements and Other Mesh Reduction Methods XXXIII

View full text Add to dashboard Cite

show abstract

“…The number of N number of data records, R 2 coefficient of linear regression, NF normal faulting, SS strike-slip faulting, RF reverse faulting trajectories needed to adequately describe a stress field depends on the smoothness of the field. A relatively large number of stress trajectories are required to characterise an irregular stress field (Isra and Galybin 2010). For detailed reservoir models, however, stress orientations smoothed or discrete are not sufficient to set up reasonable initial stress conditions for a geomechanical-numerical model that aims to quantify bore-hole failure, reactivation of sealing faults, and to predict optimal drilling pathways on fracture propagation.…”

Section: Stress Orientation Wsmmentioning

confidence: 99%