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Cyclic testing of short-length buckling-restrained braces with detachable casings
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  • Journal title : Earthquakes and Structures
  • Volume 10, Issue 3,  2016, pp.699-716
  • Publisher : Techno-Press
  • DOI : 10.12989/eas.2016.10.3.699
 Title & Authors
Cyclic testing of short-length buckling-restrained braces with detachable casings
Pandikkadavatha, Muhamed S.; Sahoo, Dipti R.;
 Abstract
Buckling-restrained braced frames (BRBFs) are commonly used as lateral force-resisting systems in the structures located in seismic-active regions. The nearly symmetric load-displacement behavior of buckling-restrained braces (BRBs) helps in dissipating the input seismic energy through metallic hysteresis. In this study, an experimental investigation has been conducted on the reduced-core length BRB (RCLBRB) specimens to evaluate their hysteretic and overall performance under gradually increased cyclic loading. Detachable casings are used for the concrete providing confinement to the steel core segments of all test specimens to facilitate the post-earthquake inspection of steel core elements. The influence of variable core clearance and the local detailing of casings on the cyclic performance of RCLBRB specimens has been studied. The RCLBRB specimen with the detachable casing system and a smaller core clearance at the end zone as compared to the central region exhibited excellent hysteretic behavior without any slip. Such RCLBRB showed balanced higher yielding deformed configuration up to a core strain of 4.2% without any premature instability. The strength-adjustment factors for the RCLBRB specimens are found to be nearly same as that of the conventional BRBs as noticed in the past studies. Simple expressions have been proposed based on the regression analysis to estimate the strength-adjustment factors and equivalent damping potential of the RCLBRB specimens.
 Keywords
braced frames;buckling-restrained braces;component testing;energy dissipation;seismic response;yielding;
 Language
English
 Cited by
1.
Testing of Buckling-Restrained Braces with Replaceable Steel Angle Fuses, Journal of Structural Engineering, 2018, 144, 3, 04018001  crossref(new windwow)
2.
11.45: Cyclic testing on hybrid buckling-restrained Braces (HBRBs), ce/papers, 2017, 1, 2-3, 3200  crossref(new windwow)
3.
Analytical investigation on cyclic response of buckling-restrained braces with short yielding core segments, International Journal of Steel Structures, 2016, 16, 4, 1273  crossref(new windwow)
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