Experimental and Numerical Investigation of Lateral Loaded Flexible Hybrid Piles in Sand

Trojnar, K.

doi:10.1007/s40999-022-00736-x

Cited by 4 publications

(2 citation statements)

References 46 publications

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“…A similar problem was analysed in proposal for the calculating hybrid piles with rigid and flexible shafts. Details are available in previous studies [7,23].…”

Section: Discussionmentioning

confidence: 99%

The green spaces of the city and their significance in rehabilitation of cognitive functions – The spatial method of stimulation

Blazy,

Hrehorowicz-Gaber,

Hrehorowicz-Nowak

2024

Archives of Civil Engineering

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This paper reviews latest developments of substructures for offshore wind turbines focusing on investigations and applications of hybrid foundations. Model tests and numerical analyses were used to simulate the loading of hybrid piles in sand. The results of pile-soil interaction were investigated to confirm the changes in soil stiffness around the hybrid monopile head. The mechanism and factors affecting the change in lateral stiffness of the hybrid foundation were explained by analysing p-y curves for M+H loading conditions in sand. Based on this research, a new shape of p-y curves for hybrid monopiles was established and a method for determining key parameters was proposed. The effectiveness of new p-y curves was verified by comparing back-calculated results with those from numerical simulations. The conducted tests confirmed that the hybrid monopile displacement is 30-50% smaller when compared to a standard monopile with similar dimensions. The gained experiences can be useful for designers and researchers to enhance the design of foundations for offshore wind turbines.

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“…A similar problem was analysed in proposal for the calculating hybrid piles with rigid and flexible shafts. Details are available in previous studies [7,23].…”

Section: Discussionmentioning

confidence: 99%

The green spaces of the city and their significance in rehabilitation of cognitive functions – The spatial method of stimulation

Blazy,

Hrehorowicz-Gaber,

Hrehorowicz-Nowak

2024

Archives of Civil Engineering

View full text Add to dashboard Cite

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“…Kiani et al [19], Hossain et al [20], and Heo et al [21] showed the relationship between the SCP arrangement and the deformation of the foundation. Moreover, the piles can significantly improve the lateral bearing capacity of the foundation and effectively increase the foundation densification and the effective stress of the soil around the piles [22][23][24][25]. A large number of analysis methods show that the pile-soil interaction under dynamic loads is similar to that of Euler-Bernoulli beams and Pasternak foundations [26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Deformation and Stress Analysis of Pile-Supported Immersed Tunnels under Seismic Loads

Zhuang,

Fan,

et al. 2023

Applied Sciences

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The stress and deformation of pile-supported immersed tunnels under seismic loads is a critical issue in tunnel design. This paper utilizes ABAQUS (version 2020) finite element software to analyze the seismic load response of the sand compaction pile-immersed tunnel–seawater pressure (SIS) system, which is verified by a physical model. The study shows that the suppression effect of the seawater on the vertical frequency of the tunnel increases with depth. When the replacement rate of the piled foundation reaches 50%, the deformation of the tunnel “H-shaped” structures increases, which also changes the vertical frequency of the tunnel. However, the presence of the suppression effect causes resonance injury at the far end of the tunnel from the earthquake source, resulting in a shift of the peak stress point. It was also found that seawater pressure affects the resistance–deflection (p-y) at the tip of the pile more than at the end of the pile. The slenderness ratio (γ) of the pile affects the p-y value at the end of the pile more than at the tip of the pile. The connection between the piled foundation and the tunnel is most stable when γ is in the range of 9.25 to 15.

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The Role of Utilizing Load in Different Cases While Numerical Modeling of Multi-story Buildings on Alluvial Stratum: A Comparison Study

Arslan,

Kayaturk,

Durmus

et al. 2024

Arab J Sci Eng

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Industrialization and population growth have made surface areas more valuable, thereby the multi-story buildings have become an absolute necessity. At this point, numeric models became the fastest and simplest way to evaluate the response of soils and structures. The issued factor in the current paper is related to the way of transferring the multi-story building loads to an alluvial stratum and evaluate the accuracy of different cases, in order to save time and economy. For load transfer, the first case (case i) includes uniform distributed load, the second case (case ii) includes the transfer from the basement columns and walls, and the third case (case iii) includes modeling the real state of the building. Mainly, all three cases gave close results in terms of settlement magnitudes of 2.21, 1.96, and 1.81 cm, respectively. It was inspected that case (i) showed 12.8% more deformation than case (ii) and 22.1% more deformation than case (iii). However, the situation is not the same for the settlement pattern, and the under-column and corner effects are neglected in uniform load. Additionally, the bending moments, which is a critical parameter for the design of a reinforced concrete foundation, have developed different results. In case (ii) and (iii) a bending moment of 500 kNm/m is observed in the center column, while in case (i) the moments converge to 0. Therefore, this study highlights the importance of outstanding decision making when assessing the load-transferring mechanism in modeling with numerical methods. The necessity of the determination of the convenient load transfer way depending on the parameter that is crucial in the evaluation of the soil–structure interaction comes to the fore with current paper.

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Experimental and Numerical Investigation of Lateral Loaded Flexible Hybrid Piles in Sand

Cited by 4 publications

References 46 publications

The green spaces of the city and their significance in rehabilitation of cognitive functions – The spatial method of stimulation

The green spaces of the city and their significance in rehabilitation of cognitive functions – The spatial method of stimulation

Deformation and Stress Analysis of Pile-Supported Immersed Tunnels under Seismic Loads

The Role of Utilizing Load in Different Cases While Numerical Modeling of Multi-story Buildings on Alluvial Stratum: A Comparison Study

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