Dynamic Response of Deepwater Pile Foundation Bridge Piers under Current-wave and Earthquake Excitation

Abstract

 The major methods for investigating the interaction between a wave current and an elevated pile cap foundation are discussed.  The changing rule of hydrodynamic pressure with water depths, current speed, wave properties, earthquake amplitudes, and frequencies are presented.  A series of combined current-waveearthquake tests are shown.Pile foundation bridges are structures extending in the middle of the sea, so they are subject to currents, waves, and earthquake forces. This article presents a hybrid simulation that was used with input excitations of different current velocities, wave properties, and earthquake amplitudes to assess the non-linear dynamic behavior of pile foundation bridge piers. Based on the interface between M ATLAB and ABAQUS software, the general formulations of fluid-structure interaction (FSI) under combined current-wave and earthquake loads are derived. Hydrodynamic and earthquake loading is consistently introduced by creating synthetic time histories of combined current-wave actions and spatially variable ground motion.The behavior of the dynamic model of a deepwater pile foundation bridge for the Songhua River in northeast China was adopted as an example of the study. The accuracy of the created model was verified using prior experimental and analytical computations. It is demonstrated how both linear and nonlinear dynamic behavior performs at various water depths under coupled current-wave-earthquake loading conditions. Revealing interesting aspects, particularly in terms of relative displacement, acceleration, shear, and moment response are shown. The results showed that the hybrid model is an efficient of simulating accurate predictions of the hydrodynamic pressure during earthquake actions for structures in coastal areas.

Application of ANSYS-Fluent Software for Innovative Stepped Dissipation Blocks Arrangement in Ogee Spillway

“…Correlation R2 and RMSE equal 0.95-0.97 and 0.43-0.45, respectively. Accordingly, a good convergence between the results was confirmed by previous studies [20][21][22][23][24]. It was possible to create a new relationship between the sequent depth ratio and the Froude number for the optimal configuration, C1;…”

Seismic analysis and test facilities of deep‐water bridges considering water–structure interaction: A state‐of‐the‐art review

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Experimental Investigation of Energy Dissipation in Ogee Spillway Using New Distributions of Dissipation Blocks

“…Scour is the process of water removing particles from the riverbed and banks of a river or channel. Many scholars have looked at the elements that influence this phenomenon to figure out what causes it and how to fix it [10][11][12][13][14].…”