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Seismic Retrofit of Steel Truss Bridge Using Buckling Restrained Damper

Department of Civil Engineering, Kyushu Institute of Technology, Kitakyushu, Fukuoka 804-8550, Japan
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Appl. Sci. 2019, 9(14), 2791; https://doi.org/10.3390/app9142791
Received: 9 June 2019 / Revised: 8 July 2019 / Accepted: 9 July 2019 / Published: 11 July 2019
(This article belongs to the Special Issue Bridge Dynamics)
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Abstract

Buckling Restrained Bracings (BRBs) are widely used to improve the seismic behavior of buildings. They are employed for bridges as well, but their application in this respect is limited. BRBs can also be used as a function of the individual damper rather than the structural component or the bracing, in which case the device may be called a Buckling Restrained Damper (BRD). Yet, such application has not been explored much. There are quite a few bridges designed according to the old design codes in Japan. Their seismic resistance may not be satisfactory for the current seismic design codes. Against this background, the behavior of a steel truss bridge under a large seismic load was investigated by nonlinear dynamic finite element analysis. Some members were indeed found to be damaged in the earthquake. Retrofitting is needed. To this end, the application of BRD was tried in the present study: a parametric study on the seismic behavior of the truss bridge with BRD was conducted by changing the length, the cross-sectional area, the location and the inclination of BRD. The effectiveness of BRD was then discussed based on the numerical results thus obtained. In all the analyses, ABAQUS was used. View Full-Text
Keywords: buckling restrained damper; energy absorption; truss bridge; retrofit; seismic behavior; nonlinear dynamic analysis buckling restrained damper; energy absorption; truss bridge; retrofit; seismic behavior; nonlinear dynamic analysis
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Sosorburam, P.; Yamaguchi, E. Seismic Retrofit of Steel Truss Bridge Using Buckling Restrained Damper. Appl. Sci. 2019, 9, 2791.

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