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Title

SEISMIC EFFECTIVE-STRESS ANALYSIS OF CAISSON QUAY WALL WITH LIQUEFIABLE BACKFILL

Year: 1398
COI: SEE08_058
Language: EnglishView: 173
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Authors

Babak Ebrahimian - Assistant Professor, Faculty of Civil, Water and Environmental Eng. Shahid Beheshti University, Tehran, Iran
Mohammadreza Farboud - M.Sc. Student, Faculty of Civil, Water and Environmental Eng. Shahid Beheshti University, Tehran, Iran

Abstract:

In the last 50 years, there have been many evidences of gravity quay walls seismic failures across the world. These failures are often associated with liquefaction of backfill soil in coastal areas. In this research, a series of two-dimensional finite difference effective-stress based analyses are performed in the prototype scale to investigate the seismic performance of caisson-type quay walls. In all simulations, the foundation soil beneath the caisson is assumed to be dense and non-liquefiable. However, the backfill is constructed with a relative density of 25% to reproduce a loose liquefiable soil. During dynamic analyses, excess pore water pressures are allowed to generate and dissipate in the backfill soil. For this purpose, a nonlinear elasto-plastic constitutive model is employed to simulate the seismic liquefaction behaviour of backfill materials. The obtained numerical results are validated against the corresponding observations of 1g shaking table tests. It is seen that the numerical results agree reasonably well with the actual observations in the physical model tests. In addition, the influences of caisson weight and liquefaction of backfill are investigated on the residual deformations ofgravity quay walls. The results show that the wall horizontal displacement decreases as wall weight increases. On the other hand, the horizontal and vertical displacements of the wall significantly increase due to the liquefaction of backfill soil.

Keywords:

Caisson, gravity quay wall, seismic performance, non-linear dynamic analysis, liquefaction

Paper COI Code

This Paper COI Code is SEE08_058. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/1022415/

How to Cite to This Paper:

If you want to refer to this Paper in your research work, you can simply use the following phrase in the resources section:
Ebrahimian, Babak and Farboud, Mohammadreza,1398,SEISMIC EFFECTIVE-STRESS ANALYSIS OF CAISSON QUAY WALL WITH LIQUEFIABLE BACKFILL,8th International Conference on Seismology and Earthquake Engineering,Tehran,,,https://civilica.com/doc/1022415

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Type of center: دانشگاه دولتی
Paper count: 19,235
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