Table of Contents
Journal of Structures
Volume 2013 (2013), Article ID 329130, 13 pages
http://dx.doi.org/10.1155/2013/329130
Research Article

Enhancing Seismic Capacity of Pile-Supported Wharves Using Yielding Dampers

School of Civil Engineering, University of Tehran, P.O. Box 11365-4563, Tehran, Iran

Received 15 February 2013; Revised 5 May 2013; Accepted 13 May 2013

Academic Editor: Domenico Bruno

Copyright © 2013 Seyed Amin Mousavi and Khosrow Bargi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a numerical study on the seismic response of pile-supported wharves equipped with metallic yielding dampers. Using 20 ground acceleration records, the contribution of the yielding damper is examined, and its main parameters are optimized through a parametric study. In the current study, considering coupling effects of different parameters, a new optimization procedure is proposed. The obtained results indicate that the stability condition of the retaining wall (quay wall) behind the wharf, period of the soil-wharf system, and also maximum allowable ductility ratio of the damper are the key factors affecting the optimum damper parameters. A simplified design guideline is proposed for either the design or the retrofit purposes followed by a numerical assessment to evaluate the contribution of the proposed damper on the seismic behavior of a typical pile-supported wharf. The obtained results show that yielding dampers, through their nonlinear behavior, can dissipate a large portion of seismic input energy and mitigate piles damages which have been observed in earlier earthquake events.