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http://dx.doi.org/10.5000/EESK.2019.23.3.159

Seismic Retrofitting Effects of General Hospital Using Self-Centering Energy Dissipative Bracing System  

Kim, Taewan (Department of Architectural Engineering, Kangwon National University)
Chu, Yurim (Department of Architectural Engineering, Kangwon National University)
Bhandari, Diwas (Department of Architectural Engineering, Kangwon National University)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.23, no.3, 2019 , pp. 159-167 More about this Journal
Abstract
2016 Gyeongju and 2017 Pohang earthquakes led Koreans to acknowledge that the Korean peninsula is not an earthquake-free zone anymore. Among various buildings crucial to after-shock recovery, general hospital buildings, especially existing old ones, are very significant so seismic retrofitting of those must be an important issue. Self-centering energy dissipative(SCED) brace is one of retrofitting methods, which consists of tendon with restoring force and friction device capable of dissipating seismic energy. The strength of the SCED brace is that the tendon forces a structure to go back to the original position, which means residual drift can be negligible. The residual drift is a very important parameter to determine usableness of general hospitals after shock. To the contrary, buckling-restrained braces(BRB) are also a very effective way to retrofit because they can resist both compressive and tensile, but residual drift may exist when the steel core yields. On this background, the seismic retrofitting effect of general hospitals reinforced with SCED braces was investigated and compared to that of the BRD in this study. As a result, although the floor acceleration cannot be reduced, the story drift and residual drift, and the shear demand of walls significantly decreased. Consequently, seismic retrofitting by SCED braces are very effective for domestic low-rise general hospitals.
Keywords
Self-centering energy dissipative brace; Seismic retrofitting; Hospital; Nonlinear dynamic analysis; Seismic behavior;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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