Experimental investigation on pullout capacity of model pile in Cohesionless Deposits

This study aims at providing research information on the pullout capacity of straight and headed-end GFRP bars embedded in bridge deck slab as pre-installed anchors for new bridge barrier-deck construction and as post-installed anchors for the replacement of deteriorated bridge barriers. In Phase I of this research, the pullout capacity of pre-installed ribbed-surface GFRP bars in twin- and triple-bar groups were investigated experimentally, considering different bar size, spacing and embedment depths. In phase II of this research, the pullout capacity of post-installed sand-coated and ribbed-surface GFRP bars were investigated experimentally considering different bar size and embedment depths and adhesive types. The experimental findings were compared with available experimental results and pullout formulas. Design values for the pullout strength of the GFRP bars as pre- and post-installed anchors in concrete were deduced.

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Experimental Investigation of Single Model Pile and Pile Group Behavior in Saturated and Unsaturated Sand

Journal of Geotechnical and Geoenvironmental Engineering ◽

10.1061/(asce)gt.1943-5606.0002176 ◽

2019 ◽

Vol 145 (12) ◽

pp. 04019112 ◽

Cited By ~ 1

Author(s):

Mohammed Al-Khazaali ◽

Sai K. Vanapalli

Keyword(s):

Experimental Investigation ◽

Pile Group ◽

Group Behavior ◽

Single Model ◽

Unsaturated Sand ◽

Model Pile

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Pullout behaviour of model pile and helical pile anchors Subjected to lateral cyclic loading

Canadian Geotechnical Journal ◽

10.1139/t94-012 ◽

1994 ◽

Vol 31 (1) ◽

pp. 110-119 ◽

Cited By ~ 19

Author(s):

Y.V.S.N. Prasad ◽

S. Narasimha Rao

Keyword(s):

Cyclic Loading ◽

Clayey Soil ◽

Pullout Capacity ◽

Lateral Deflection ◽

Degradation Factor ◽

Model Pile ◽

Helical Piles ◽

Load Tests ◽

Rigid Model ◽

Pullout Behaviour

This paper presents the effect of lateral cyclic loading on the pullout capacity of model and helical piles in clayey soil. The tests were conducted on short rigid model piles in the laboratory in three phases, namely lateral static load tests, lateral cyclic load tests, and vertical pullout tests. From the test results it was found that the lateral cyclic loading affects the pullout capacity of piles substantially. Reduction in pullout capacity mainly depends upon the lateral deflection of the pile during cyclic loading and the embedment ratio of the pile. This reduction in the pullout capacity of model piles is presented in terms of nondimensional parameters, viz., degradation factor, lateral deflection ratio, and embedment ratio of pile. However, in the case of helical piles under similar conditions, it was found that the lateral cyclic loading has very little influence on the pullout capacity. The reasons for the better performance of helical piles over ordinary piles are explained. Key words : clay, degradation factor, helical pile, lateral cyclic loading, lateral deflection, Joading level, pile, pullout capacity.

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Experimental Investigation on Pull-out Strength of Pre- and Post-Installed GFRP bars for Bridge Barrier Construction

10.32920/ryerson.14665254 ◽

2021 ◽

Author(s):

Alireza Abolghasem

Keyword(s):

Experimental Investigation ◽

Bridge Deck ◽

Pullout Capacity ◽

Pullout Strength ◽

Research Information ◽

Gfrp Bars ◽

Pull Out ◽

Design Values ◽

Experimental Findings ◽

Pull Out Strength

This study aims at providing research information on the pullout capacity of straight and headed-end GFRP bars embedded in bridge deck slab as pre-installed anchors for new bridge barrier-deck construction and as post-installed anchors for the replacement of deteriorated bridge barriers. In Phase I of this research, the pullout capacity of pre-installed ribbed-surface GFRP bars in twin- and triple-bar groups were investigated experimentally, considering different bar size, spacing and embedment depths. In phase II of this research, the pullout capacity of post-installed sand-coated and ribbed-surface GFRP bars were investigated experimentally considering different bar size and embedment depths and adhesive types. The experimental findings were compared with available experimental results and pullout formulas. Design values for the pullout strength of the GFRP bars as pre- and post-installed anchors in concrete were deduced.

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Experimental investigation on single model pile in sloping ground under lateral load

International Journal of Geotechnical Engineering ◽

10.3328/ijge.2009.03.01.133-146 ◽

2009 ◽

Vol 3 (1) ◽

pp. 133-146 ◽

Cited By ~ 20

Author(s):

N. Begum ◽

K. Muthukkumaran

Keyword(s):

Experimental Investigation ◽

Lateral Load ◽

Single Model ◽

Sloping Ground ◽

Model Pile

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Response of anchors to variations in displacement-based loading

Canadian Geotechnical Journal ◽

10.1139/t03-003 ◽

2003 ◽

Vol 40 (3) ◽

pp. 694-701 ◽

Cited By ~ 1

Author(s):

Ashraf Ghaly ◽

Adel Hanna

Keyword(s):

Experimental Investigation ◽

Strain Rate ◽

Loading Rate ◽

Dense Medium ◽

Displacement Rate ◽

Time To Failure ◽

Pullout Capacity ◽

Slight Effect ◽

Pullout Load ◽

Displacement Based

The results of an experimental investigation on the effect of variations in displacement-based loading on the pullout capacity of anchors are presented. A single-pitch, screw helical anchor was used in the testing. The tests were conducted in dry, well-graded, dense, medium, and loose sands with relative densities of 79, 47, and 19%, respectively. Anchors were installed to, and tested at, shallow and deep depths. Measurements of ultimate pullout load and displacement at failure were made. The values of time-to-failure and mean loading rate were calculated and presented. The results of this study show that variations of displacement-based loading had some effect on the pullout capacity of shallow anchors but had only a slight effect on deep anchors. For a given depth of installation and a given sand state, the ultimate pullout load of an anchor decreases with increasing loading rate. This effect was more pronounced in anchors installed to shallow depths.Key words: anchors, displacement, displacement rate, pullout capacity, strain rate, sand, foundations, uplift.

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