Simplified Expression of Hydrodynamic Pressure on Deepwater Cylindrical Bridge Piers during Earthquakes

Jiang, Hui; Wang, Baoxi; Bai, Xiaoyu; Zeng, Cong; Huidong, Zhang

doi:10.1061/(asce)be.1943-5592.0001032

Cited by 58 publications

(22 citation statements)

References 20 publications

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“…The size of an elevated pile cap of a sea-crossing bridge is large. When it vibrates, the fluid-structure interaction between the surrounding water and the vibrating pile cap will cause a large additional hydrodynamic force and change the dynamic characteristics of the structure (Jiang et al 2017. In 2010, Song et al (2010) regarded the foundation of the South Tower of the Third Nanjing Yangtze River Bridge as the research object and conducted shaking table tests on the foundation using a steel box with and without water.…”

Section: Fluid-structure Interactionmentioning

confidence: 99%

“…Hydrodynamic forces can be represented as added masses. Many scholars have developed simplified equations for calculating the hydrodynamic added masses of submerged columns or piers with various cross-sections (Jiang et al 2017). Lai et al (2004) proposed a semi-analytical and semi-numerical method for calculating the hydrodynamic pressure on cylindrical piers under an earthquake.…”

Section: Fluid-structure Interactionmentioning

confidence: 99%

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Review of the hydrodynamic challenges in the design of elevated pile cap foundations for sea-crossing bridges

Wei

Zhou

Zhang

et al. 2020

ABEN

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With the increasing demand for land transportation in coastal areas, the number of sea-crossing bridges has increased rapidly. In the construction of sea-crossing bridges, the elevated pile cap foundation is one of the most commonly used foundation types. This paper summarizes four main aspects of the research on the hydrodynamic effects on elevated pile cap foundations through timing analysis and keyword co-occurrence analysis. The relevant studies are reviewed from the aspects of waves, currents, and their interactions; the hydrodynamic load on the elevated pile cap foundation; fluid-structure interactions; and the structural responses of bridges that are supported by elevated pile cap foundations. Finally, the following future prospects for hydrodynamic studies of elevated pile cap foundations for the sea-crossing bridge have been discussed, which include wave-current interaction mechanism, wave-current load, fully coupled fluid-structure interactions, and structural dynamic response under hydrodynamic combined with the other hazards.

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Section: Fluid-structure Interactionmentioning

confidence: 99%

Section: Fluid-structure Interactionmentioning

confidence: 99%

Review of the hydrodynamic challenges in the design of elevated pile cap foundations for sea-crossing bridges

Wei

Zhou

Zhang

et al. 2020

ABEN

View full text Add to dashboard Cite

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“…Additionally, effect of the hydrodynamic pressure can be simply modeled as an 'added mass' when the surface wave and water compressibility are ignored. Assuming the structure rigid, the simplified formulas of the added mass for the earthquake induced hydrodynamic pressure on circular cylinder and elliptical cylinders were given by Jiang et al (2017), Li and Yang (2013), and Wang et al (2018a). Considering the flexible of the structure, a simple and accurate added mass representation was also presented by Han and Xu (1996).…”

Section: Introductionmentioning

confidence: 99%

An accurate frequency-domain model of water interaction with cylinders of arbitrary shape during earthquakes

Zhao

Wang

et al. 2021

ABEN

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An accurate frequency domain model is proposed to analyze the seismic response of uniform vertical cylinders with arbitrary cross section surrounded by water. According to the boundary conditions and using the variables separation method, the vertical modes of the hydrodynamic pressure are firstly obtained. Secondly, the three-dimensional wave equation can be simplified to a two-dimensional Helmholtz equation. Introducing the scaled boundary coordinate, a scaled boundary finite element (SBFE) equation which is a linear non-homogeneous second-order ordinary equation is derived by weighted residual method. The dynamic-stiffness matrix equation for the problem is furtherly derived. The continued fraction is acted as the solution of the dynamic-stiffness matrix for cylinder dynamic interaction of cylinder with infinite water. The coefficient matrices of the continued fraction are derived recursively from the SBFE equation of dynamic-stiffness. The accuracy of the present method is verified by comparing the hydrodynamic force on circular, elliptical and rectangle cylinders with the analytical or numerical solutions. Finally, the proposed model is used to analyze the natural frequency and seismic response of cylinders.

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“…It should be noted that the incompressible water can be replaced by an added mass [3]. Recently, a series of simplified formulas to evaluate the added mass of a single cylinder are presented by assuming the cylinder rigid, such as the circular cylinder [18,19], the elliptical cylinder [20,21], the round-ended and rectangular cylinders [22], and the circular tapered cylinders [23]. In addition, the simple added mass models for a flexible cylinder vibrating in water were also proposed by Han and Xu [24], Yang and Li [25], and Wang et al [26].…”

Section: Introductionmentioning

confidence: 99%

Seismic Fragility Analysis of Bridge Group Pile Foundations considering Fluid-Pile-Soil Interaction

Zhang

Wang

2020

Shock and Vibration

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The cross-sea bridges play an important role to promote the development of regional economy. These bridges located in earthquake-prone areas may be subjected to severe earthquakes during their lifetime. Group pile foundations have been widely used in cross-sea bridges due to their structural efficiency, ease of construction, and low cost. This paper investigates the seismic performance of bridge pile foundation based on the seismic fragility analysis. Based on the analysis platform OpenSees, the three-dimensional finite model of the bridge pile foundation is developed, where the pile-water interaction is replaced by the added mass method, nonlinear p-y, t-z, and q-z elements are used to simulate pile-soil interaction, and the displacement of the surface ground motion due to seismic excitations is applied on all spring supports. The seismic fragility curves of the bridge pile foundation are generated by using the earthquake records recommended by FEMA P695 as input motions. The curvature ductility based fragility curves are obtained using seismic responses for different peak ground accelerations. The effects of pile-water interaction, soil conditions, and different types of ground motions on the bridge pier fragilities are studied and discussed. Seismic fragility of the pier-group pile system shows that Sec C (the bottom section of the pier) is the most vulnerable section in the example fluid-structure-soil interaction (FSSI) system for all four damage LSs. The seismic responses of Sec E (a pile section located at the interface of the soil layer and water layer) are much lower than other sections. The parameter analysis shows that pile-water interaction has slight influence (less than 5%) on the fragility curves of the bridge pier. For the bridge group pile foundations considering the fluid-pile-soil interaction, PNF may induce larger seismic response than far-field (FF) and no-pulse near field (NNF). The bridge pile foundation in stiff soil is most vulnerable to seismic damage than soft condition.

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Simplified Expression of Hydrodynamic Pressure on Deepwater Cylindrical Bridge Piers during Earthquakes

Cited by 58 publications

References 20 publications

Review of the hydrodynamic challenges in the design of elevated pile cap foundations for sea-crossing bridges

Review of the hydrodynamic challenges in the design of elevated pile cap foundations for sea-crossing bridges

An accurate frequency-domain model of water interaction with cylinders of arbitrary shape during earthquakes

Seismic Fragility Analysis of Bridge Group Pile Foundations considering Fluid-Pile-Soil Interaction

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