The slenderness ratio effect on the response of closed-end pipe piles in liquefied and non-liquefied soil layers under coupled static-seismic loading

Duaa Al-Jeznawi; Ismacahyadi Bagus Mohamed Jais; B. S. Albusoda; Norazlan Khalid

doi:10.1515/jmbm-2022-0009

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Publication Date

Sat Jan 01 2022

Journal Name

Journal Of The Mechanical Behavior Of Materials

Volume

31

DOI

10.1515/jmbm-2022-0009

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The slenderness ratio effect on the response of closed-end pipe piles in liquefied and non-liquefied soil layers under coupled static-seismic loading

3D finite element model

liquefaction

modified Mohr-Coulomb model

slenderness

UBCSAND

Duaa Al-Jeznawi

Ismacahyadi Bagus Mohamed Jais

B. S. Albusoda

Norazlan Khalid

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AbstractThis study presents the findings of a 3D finite element modeling on the performance of a single pile under various slenderness ratios (25, 50, 75, 100). These percentages were assigned to cover the most commonly configuration used in such kind of piles. The effect of the soil condition (dry and saturated) on the pile response was also investigated. The pile was modeled as a linear elastic, the surrounded dry soil layers were simulated by adopting a modified Mohr-Coulomb model, and the saturated soil layers were simulated by the modified UBCSAND model. The soil-pile interaction was represented by interface elements with a reduction factor (R) of 0.6 in the loose sand layer and 0.7 in the dense sand layer. The study was compared with the findings of 1g shaking table tests which were performed with a slenderness ratio of 25. In the validation case, there was a clear correlation between the laboratory findings and the numerical analyses. It was observed that the failure mechanism is influenced by the soil condition and the slenderness ratio to some extent. Under the dry soil condition, no base pile deformation was observed; However, tip pile movement was observed under the saturated soil condition with pile slenderness ratios of 25 and 50. The findings of this study are also aimed to include an approximation of the long-term deformations at the ground surface which has experienced shaking.

Publication Date

Wed Oct 05 2022

Journal Name

Heat Transfer

Numerical investigation of natural convection in a square enclosure partially filled with horizontal layers of a porous medium

Abdulwahed A.S.

Luma F. Ali

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AbstractTwo‐dimensional buoyancy‐induced flow and heat transfer inside a square enclosure partially occupied by copper metallic foam subjected to a symmetric side cooling and constant heat flux bottom heating was tested numerically. Finite Element Method was employed to solve the governing partial differential equations of the flow field and the Local Thermal Equilibrium model was used for the energy equation. The system boundaries were defined as lower heated wall by constant heat flux, cooled lateral walls, and insulated top wall. The three parameters elected to conduct the study are heater length (7 ≤ <italic>ζ</italic> ≤ 20 cm), constant heat flux (150 ≤ <italic>q<</italic> ... Show More

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(6)

Publication Date

Sat Jan 01 2022

Journal Name

Open Engineering

Field tests of grouted ground anchors in the sandy soil of Najaf, Iraq

Nadher H.

Balqees Abdulwahid

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AbstractThis article presents test results documentation for four grouted ground anchors embedded in sandy soil. Three anchors were trial, while one was a working anchor. One trial anchor is instrumented with eight resistance-type strain gauges glued on the corrugated pipe and embedded within the grouted body. An acceptance test was made for all anchors to determine the working load. Acceptance criteria suggested by the Post-Tensioning Institute were applied, and the working anchor did not pass the creep criterion, so it was taken out of service. The strain measurements indicated that the compression stresses were generated along the free length, while the tension stresses were generated alon ... Show More

(1)

Publication Date

Wed Apr 13 2022

Journal Name

International Journal Of Medical Sciences

Evaluation of the Levels of Erythropoietin and Some Haehematological Parameters in Patients with History of Haemodialysis and Non- haemodialysis

Wasan

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Publication Date

Fri Jan 01 2021

Journal Name

Chemosphere

Impact of anaerobically digested silver and copper oxide nanoparticles in biosolids on soil characteristics and bacterial community

Zainab

Richard

Banu

Maria

Juliska

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Publication Date

Mon Jul 01 2019

Journal Name

Journal Of Educational And Psychological Researches

The Effect of the Addie and Shayer Model on the Achievement of Fifth Grade Students and their Attitudes towards History: The Effect of the Addie and Shayer Model on the Achievement of Fifth Grade Students and their Attitudes towards History

Ahmed Hashim Mohammed and Hadil Jassas Ali

Hadil Jassas Ali

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Abstract

The current research aims to examine the effect of the Adi and Shayer model on the achievement of fifth-grade students and their attitudes toward history. To achieve the research objective, the researcher has adopted two null hypotheses. 1) there is no statistically significant difference at the level of (0.05) between the average score of students of the experimental group who study the history of Europe and modern American history according to the model of Addie and Shayer, and the average scores of the students of the control group who study the same subjects according to the traditional method in the test of post-achievement. 2) There was no statistically significant difference at the level (

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Publication Date

Fri Dec 30 2016

Journal Name

International Journal Of Advanced Research In Biological Sciences (ijarbs)

The effect of obesity on the periodontal health status

hadeel

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(1)

Publication Date

Mon Jan 01 2024

Journal Name

Open Life Sciences

Evaluation of the role of some non-enzymatic antioxidants among Iraqi patients with non-alcoholic fatty liver disease

nonalcoholic fatty liver disease

antioxidants

coenzyme Q10

vitamin E

vitamin C

oxidative stress

Ammar L.

Dunia T.

Gulboy A.

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AbstractNon-alcoholic fatty liver disease (NAFLD), characterized by hepatic fat accumulation in individuals consuming little or no alcohol, has become highly prevalent globally. Oxidative stress plays a central role in instigating inflammation and cell death pathways driving NAFLD progression. This case–control study aimed to elucidate the association between circulating levels of the pivotal non-enzymatic antioxidants – coenzyme Q10 and vitamins E and C – and liver injury parameters among 60 Iraqi NAFLD patients versus 30 healthy controls. NAFLD diagnosis entailed over 5% hepatic steatosis on ultrasound excluding other etiologies. Patients spanned three age groups: 20–29, 30–39, an ... Show More

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Publication Date

Tue Aug 01 2023

Journal Name

Iop Conference Series: Earth And Environmental Science

The Water Footprint and Virtual Water and Their Effect on Food Security in Iraq

Al-Badri B.H.

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AbstractThe study aimed to explaining the concepts of water footprint and virtual water and how these two concepts could use to achieve water savings at the local level to meet the water supply deficit in Iraq, which is expected to increase in the coming years and influence of that on food security in Iraq by using these concepts when drawing production, irrigated and import plans in Iraq. The study aimed to studying the water footprint and virtual water and their impact on the foreign trade for wheat and rice crops during the period 2000-2022 and estimating the most important indicators of virtual water and the water footprint of the study crops due to the importance of these criteria in det ... Show More

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(2)

Publication Date

Fri May 01 2020

Journal Name

Iraqi Geological Journal

3D SEISMIC ATTRIBUTES INTERPRETATION OF ZUBAIR FORMATION IN AL-AKHAIDEIR AREA, SOUTHWESTERN KARBALA

Kamal Kareem

G.F.

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(10)

Publication Date

Sun Jan 01 2017

Journal Name

Iraqi Journal Of Agricultural Sciences

Response of different cucumber hybrids to grafting on squash rootstock

A.H.

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(2)

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