A Soil-Pile Response under Coupled Static-Dynamic Loadings in Terms of Kinematic Interaction

Duaa Al-Jeznawi; I. B. Mohamed Jais; B. S. Albusoda

doi:10.2478/cee-2022-0010

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Publication Date

Wed Jun 01 2022

Journal Name

Civil And Environmental Engineering

Volume

18

DOI

10.2478/cee-2022-0010

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A Soil-Pile Response under Coupled Static-Dynamic Loadings in Terms of Kinematic Interaction

Earthquake

Pile response

Sandy soil

Bending moment

Lateral deflection.

Duaa Al-Jeznawi

I. B. Mohamed Jais

B. S. Albusoda

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AbstractAlthough the axial aptitude and pile load transfer under static loading have been extensively documented, the dynamic axial reaction, on the other hand, requires further investigation. During a seismic event, the pile load applied may increase, while the soil load carrying capacity may decrease due to the shaking, resulting in additional settlement. The researchers concentrated their efforts on determining the cause of extensive damage to the piles after the seismic event. Such failures were linked to discontinuities in the subsoil due to abrupt differences in soil stiffness, and so actions were called kinematic impact of the earthquake on piles depending on the outcomes of laboratory tests and other numerical analyses. In this research, numerical modeling is used to explore the kinematic forces created in a single pile erected in two sand layers under two different conditions (dry and saturated states). Based on the obtained results from the physical model, the maximum bending moment was observed at a depth around 200 mm below the ground surface in the loose sand layer, then these values gradually reduced until it becomes negative in the dense sand layer. It has been demonstrated that this modeling may be used to predict how a pile foundation would respond to “kinematic” loading generated by ground movements during a seismic event. Consequently, the current findings could be used in the design and construction of bored aluminum or steel piles in Al-Karbala soil.

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Journal Name

Environmental Science And Pollution Research

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Alaa Hussein

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This experimental research was conducted to quantify the combined effect of the external bonded Carbon Fiber Reinforced Polymer (CFRP) plate width and prestressing on the flexural performance of reinforced concrete (RC) beams in terms of strength improvement. Seven beams (one control and six strengthened) were subjected to two-point loading tests. The experimental methodology consisted of the testing of three different widths of the CFRP plates (25, 40, and 60 mm) in non-prestressed and prestressed conditions. Prestressing was accomplished by tensioning the plates to 23% of the CFRP tensile strength using a novel, locally developed mechanical anchorage system, which is one of the key experimental contributions that distinguishes thi

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(1)

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Wed Apr 25 2018

Journal Name

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Journal Name

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AbstractThe experiment was carried out in the spring season of 2017 in the open fields of the College of Agricultural Engineering Sciences/University of Baghdad/Al-Jadriya camps in order to improve the growth and yield of potato plants resulting from the cultivation of true potato seeds of the hybrid BSS-295 by spraying with two organic nutrients. The experiment included two factors: First one was spraying with Megafol nutrient at concentrations 0, 1, 2 and 4 ml l-1 and the second was spraying with Algazone nutrient at concentrations 0, 1.5 and 3 ml l-1, the experiment was applied according to the complete randomized block design with three replicatio ... Show More

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Noor Mohsen

Sura Jasem Mohammed

Ahmed Abdulrazzaq

Ali Dawood

Laith Majeed

Maytham Khalaf

Hamza Abbas

Haydar Muhamad

Malik M.

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ABSTRACTThe majority of the environmental outputs from gas refineries are oily wastewater. This research reveals a novel combination of response surface methodology and artificial neural network to optimize and model oil content concentration in the oily wastewater. Response surface methodology based on central composite design shows a highly significant linear model with P value <0.0001 and determination coefficient R2 equal to 0.747, R adjusted was 0.706, and R predicted 0.643. In addition from analysis of variance flow highly effective parameters from other and optimization results verification revealed minimum oily content with 8.5 ± 0.7 ppm when initial oil content 991 ppm, tempe ... Show More

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Publication Date

Sun Jul 01 2012

Journal Name

Bulletin Of The Iraq Natural History Museum (p-issn: 1017-8678 , E-issn: 2311-9799)

OCCURRENCE OF ENTOMOPATHOGENIC AND OTHER OPPORTUNISTIC FUNGI IN SOIL COLLECTED FROM INSECT HIBERNATION SITES AND EVALUATION OF THEIR ENTOMOPATHOGENIC POTENTIAL

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Lazgeen Haji

Samir Khalaf

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A survey of entomopathogenic and other opportunistic fungi isolated from soil samples collected from insect hibernation sites in different habitats in Kurdistan region of Iraq was carried out during October to December 2009. By using dilution plate method, two entomopathogenic species (Beauveria bassiana (Bals.) Vuill.and Isaria javanica (Friedrichs & Bally) Samson & Hywel-Jones) were detected with isolation percentage (38.46%) each. Other opportunistic fungi such as Alternaria alternata, Aspergillus flavus, A.niger, Penicillium glabrum, P. digitatum, Rhizopus stolonifer and Syncephalastratum racemosum

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