Pushover Analysis Accounting for Torsional Dynamic Amplifications for Pile-Supported Wharves

Abstract

In this paper the pushover analysis for pile-supported wharf structures (PSWSs) is carried out. This nonlinear static analysis is a common method to estimate the optimum displacement demand for seismic design of constructions. The main aspect of this study is to account for the dynamic magnification factors due to torsional effects. 2D and 3D models by finite element method (FEM) were computed considering the seismic loadings, modal analysis, and the lateral stiffnesses imposed to consider the soil-piles interactions. The seismic design of the piles consists in accounting for the formation of plastic hinges. The purpose is to determine, in a deterministic way, the performance points of the structure in terms of base shears and displacements, then, in a stochastic analysis, to estimate the probability of exceedance of horizontal displacements of a semi-flexible model with respect to a flexible model. The case study is a real pile-supported wharf in ports placed in a high seismicity area, in this sense, this paper should provide some useful technical data. The advantage of using the nonlinear pushover analysis in terms of displacements was estimated about 30%. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.