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International Journal of Steel Structures

Published in:

20-07-2018

Investigation of MRS and SMA Dampers Effects on Bridge Seismic Resistance Employing Analytical Models

Authors: Eunsoo Choi, Jong-Su Jeon, Woo Jin Kim, Joo-Won Kang

Published in: International Journal of Steel Structures | Issue 4/2018

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Abstract

This study dealt with investigating the seismic performance of the smart and shape memory alloy (SMA) and magnets plus rubber-spring (MRS) dampers and their effects on the seismic resistance of multiple-span simply supported bridges. The rubber springs in the MRS dampers were pre-compressed. For this aim, a set of experimental works was performed together with developing nonlinear analytical models to investigate dynamic responses of the bridges subjected to earthquakes. Fragility analysis and probabilistic assessment were conducted to assess the seismic performance for the overall bridge system. Fragility curves were then generated for each model and were compared with those of as-built. Results showed dampers could increase the seismic capacity of bridges. Furthermore, from system fragility curves, use of damper models reduced the seismic vulnerability in comparison to the as-built bridge model. Although the SMA damper showed the best seismic performance, the MRS damper was the most appropriate one for the bridge in that the combination of magnetic friction and pre-compressed rubber springs was cheaper than the shape memory alloy, and had the similar capability of the damper.

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Title: Investigation of MRS and SMA Dampers Effects on Bridge Seismic Resistance Employing Analytical Models
Authors: Eunsoo Choi
Jong-Su Jeon
Woo Jin Kim
Joo-Won Kang
Publication date: 20-07-2018
Publisher: Korean Society of Steel Construction
Published in: International Journal of Steel Structures / Issue 4/2018
Print ISSN: 1598-2351
Electronic ISSN: 2093-6311
DOI: https://doi.org/10.1007/s13296-018-0125-8

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