Current Design and Construction Practices of Bridge Pile Foundations with Emphasis on Implementation of LRFD

AbdelSalam, Sherif S.; Sritharan, Sri; Suleiman, Muhannad T.

doi:10.1061/(asce)be.1943-5592.0000118

Cited by 41 publications

(14 citation statements)

References 4 publications

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“…e bridge foundation has a variety of forms such as the caisson foundation, the tube caisson foundation, and the open caisson foundation. When the water is deep, the pile foundation, which consists of a group of bored piles extending to soil at the bottom and connected to a large cap at the top, has widely been used owing to its convenient construction and good adaptability [24][25][26]. However, it is difficult to model the precise dynamic response of the pile foundation under various dynamic loads due to large dimensions, structural complexity, and three-dimensional characteristics [27].…”

Section: Introductionmentioning

confidence: 99%

Improvement on Structural Forms of Pile Group Foundations of Deepwater Bridges

Ren

Tang

et al. 2019

Shock and Vibration

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As long-span cross-sea bridges extend to deeper sea areas, the bridge pile tends to increase in its slenderness ratio and becomes more susceptible to waves. To improve the structural stability at the construction stage, this study analyses wave-induced response of foundations. The wave theory and the method used for computing wave forces on foundations are first introduced. Then, a pile group foundation is taken as the research object, and different pile lengths ranging from 16 m to 46 m are considered. The wave-induced response of the piles and the cap is calculated. After understanding the effect of the pile length, three optimized foundations are proposed with the aim of reducing the free length of the pile, and the corresponding finite element models are established to compare their wave-induced response. The results show that the displacement at the top of the foundation increases with the increase in the pile length until the cap partly emerges from water and so does the internal force at the bottom. Setting a constraint in the middle of the piles can reduce their free lengths and is favourable to the wave-induced response of the foundation except for the shearing force. A stronger constraint shows better effects on improvement of the stability of the foundation. The conclusions provide reference for optimization on pile foundations of deepwater bridges.

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Section: Introductionmentioning

confidence: 99%

Improvement on Structural Forms of Pile Group Foundations of Deepwater Bridges

Ren

Tang

et al. 2019

Shock and Vibration

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“…In recent years, pile foundations have been commonly used in deep-water long-span offshore bridge construction due to their low cost, convenient construction, and structural efficiency [1][2][3]. The pile-cap system commonly found in these large-scale offshore bridge engineering environment is built by a group of piles with a large-scale cap on top of them.…”

Section: Introductionmentioning

confidence: 99%

Influences of Pile Group Effects on Wave Forces on an Offshore Bridge Pile-Cap Foundation

et al. 2017

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Abstract:In this study, a three-dimensional numerical model for a pile-cap system of an offshore bridge is developed to examine the pile group effect on wave force of pile with different arrangements of the pile group with a pile-cap system. In the present model, the Reynolds-averaged Navier-Stokes equation is taken as the governing equation for wave motion, while the volume of fluid method is used to trace the free water surface. Based on the present model, a set of analysis was conducted to examine the influence of the pile-cap system on the pile group effect, including the arrangement of the pile group, the submerged depth of the bridge cap, and the existence of the cap. Numerical examples show that the present model overall agreed well with the previous experimental data. The existence of the cap and submerged coefficient of the cap have a significant influence on the pile group effect coefficient. During the study of the pile group effect on the wave force of a pile with a pile-cap system of an offshore bridge, the influence of the existence of the cap on the pile group effect needs to be considered.

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“…Deep water bridges are popular solutions for crossing large spans of rivers, straits or portions of oceans (Feng 2009). In recent years, pile foundations have been widely used in deep water long-span bridges due to their structural efficiency, low cost and ease of construction (Ingham et al 1999;DiMaggio and Goble 2004;AbdelSalam et al 2010). Such bridge foundations, as those of Sutong Bridge (Bittner et al 2007), China East Sea Bridge (Liu et al 2007) and Xiangshan Bridge (Gao et al 2008), consist mainly of a group of long piles extending to the soil below water surface and connected through a large concrete cap.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Assessment of the Three-Dimensional Modal Dynamic Response of Bridge Pile Foundations Submerged in Water

2013

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This paper describes an experimental program conducted to investigate the effects of fluid-structure interaction on the modal dynamic response of three reduced-scale bridge pile foundations submerged partially or totally in water. The vibration periods of the specimens are measured for the two lateral modes and first torsional mode using ambient and forced-vibration tests. The results are presented and discussed as a function of surrounding water levels and the number and geometrical patterns of the piles. Three-dimensional (3D) finite element models of the tested specimens surrounded by different water levels are built and the results are successfully validated against the obtained experimental data. The built numerical models are used to compute 3D modal hydrodynamic pressures. A systematic analysis of the period ratios and 3D hydrodynamic loads is presented to characterize the effects of pile cap, water height and the number and geometrical pattern of the piles on dynamic response. The experimental and numerical results of this research allow a better understanding of the complex dynamically-induced fluid-structure interaction effects in the response of deep water bridge pile foundations.

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Current Design and Construction Practices of Bridge Pile Foundations with Emphasis on Implementation of LRFD

Cited by 41 publications

References 4 publications

Improvement on Structural Forms of Pile Group Foundations of Deepwater Bridges

Improvement on Structural Forms of Pile Group Foundations of Deepwater Bridges

Influences of Pile Group Effects on Wave Forces on an Offshore Bridge Pile-Cap Foundation

Experimental and Numerical Assessment of the Three-Dimensional Modal Dynamic Response of Bridge Pile Foundations Submerged in Water

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