Seismic isolation retrofitting solution for an existing steel cable-stayed bridge

Ahad Javanmardi; Zainah Ibrahim; Khaled Ghaedi; Niaz Bahadur Khan; Hamed Benisi Ghadim

doi:10.1371/journal.pone.0200482

Seismic isolation retrofitting solution for an existing steel cable-stayed bridge

PLoS One. 2018 Jul 30;13(7):e0200482. doi: 10.1371/journal.pone.0200482. eCollection 2018.

Authors

Ahad Javanmardi¹, Zainah Ibrahim¹, Khaled Ghaedi¹, Niaz Bahadur Khan², Hamed Benisi Ghadim³

Affiliations

¹ Civil Engineering Department, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia.
² School of Mechanical and Manufacturing Engineering, National University of Sciences and Technology, Islamabad, Pakistan.
³ Sustainable and Innovative Bridge Engineering Research Center (SIBERC), Faculty of Civil Engineering, Fuzhou University, Fuzhou-Minhou, China.

Abstract

This paper investigated the seismic retrofitting of an existing cable-stayed bridge through the use of a seismic isolation system. The bridge is situated in a high seismic zone. During the Saguenay earthquake 1988, one of the anchorage plates of the bridge supports failed. Herein, several configurations of seismic isolation system were considered to identify an appropriate solution for the seismic retrofitting of the bridge in both the longitudinal and transverse directions. A three-dimensional model of the bridge was created, and its seismic behavior studied through nonlinear dynamic time-history analysis. The comparative performance study among the five retrofitting configurations showed that the partial seismic isolation of the bridge led to an enhancement of the seismic response of the bridge in one direction only. However, the overall seismic response of the cable-stayed bridge substantially improved in the longitudinal and transverse directions in cases where the isolation systems were utilized between the supports and the deck-tower connection of the bridge.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Canada
Construction Materials
Disasters*
Earthquakes*
Equipment Design
Motion
Nonlinear Dynamics
Steel*
Structure Collapse / prevention & control*

Substances

Steel

Grants and funding

The authors gratefully acknowledge the support given by University Malaya Research Grant (UMRG - Project No. RP004A/13AET), University Malaya Postgraduate Research Fund (PPP – Project No. PG242-2015B) and Fundamental Research Grant Scheme, Ministry of Education, Malaysia (FRGS - Project No. FP028/2013A).