Posts Tagged ‘plaxis’

28
Apr

Can Plaxis 2D Model a Laterally Loaded Pile?

Written by Gouw Tjie Liong. Posted in Geotechnic, Note and Discussion

Someone have modeled a pile for lateral loading in PLAXIS 2D software 
he asked: In the output file, one table we can check for the results.
Could anyone please tell me what is meant by Nmin,Qmin,Mmax ?

Answer:  Old version of Plaxis 2D definitely CANNOT be used to model the laterally loaded pile. In the newest version there is a pile element. But even with this element provided, it is not for calculation of laterally loaded pile. It is a 3D problem, analysis sholud be done in Plaxis 3D. 
Q, N, M refers to shear, normal (axial) and moment.

28
Apr

How to model repetitive loading in Plaxis 2D?

Written by Gouw Tjie Liong. Posted in Geotechnic, Note and Discussion

A graduate student from Texas A&M University asked:
I’m currently working on a project related to Rail Embankments. How a repetitive/ cycling loading can be simulated in a typical FEM model (I’m using PLAXIS 2D) considering the effect of fatigue.

My answer:
Use HS small soil model, cyclic loading can then be simulated by choosing dynamic analysis and the loading vs time can be created by making a text file first in Notepad (left column is time, right column is magnitude of loading).

22
Jun

Deep Excavation Failures, Can They be Prevented?

Written by Gouw Tjie Liong. Posted in GTL Paper, Publication

ABSTRACT: The writer has been working in the field of geotechnical engineering since 1984, along the way he has seen a number of deep excavation failures, some with minor casualties, others involving a huge amount of economic loss, some cost no human life, others with a number of fatalities. This paper tries to discuss what could be the causes of those failures, from the possible technical to the non-technical reasons. It also tries to extract what can be learned from those failures, starting from the lack of reliable soil investigation data, inadequate geotechnical design knowledge, poor execution, to poor quality control. The non technical reasons, such as: the lowest bid win policy and its implication are also discussed. Finally, steps to minimize geotechnical failures are suggested.

Download full paper (in English)

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