Subassemblage test of buckling-restrained braces with H-shaped steel core

Summary In this study, a subassemblage test was performed using buckling‐restrained braces with an H‐shaped core element, which have been proven in a previous uniaxial component test to have good performance. The loading protocol prescribed the quasi‐static cyclic pattern with stepwise incremental d...

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Bibliographic Details
Published in:The structural design of tall and special buildings 2015-03, Vol.24 (4), p.243-256
Main Authors: Kim, Do-Hyun, Lee, Chang-Hwan, Ju, Young K., Kim, Sang-Dae
Format: Article
Language:English
Subjects:
Bolting
Bolts
Bracing
buckling-restrained braces
Compressive strength
Concretes
cumulative plastic ductility
cyclic loadings
energy dissipation
Joints
steel damper
Structural steels
subassemblage test
Tubes
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Summary:Summary In this study, a subassemblage test was performed using buckling‐restrained braces with an H‐shaped core element, which have been proven in a previous uniaxial component test to have good performance. The loading protocol prescribed the quasi‐static cyclic pattern with stepwise incremental displacement amplitude. Two different end connections (bolted connection and pin connection) and two different buckling‐restrained mechanisms (concrete‐filled tube and hollow steel tube) were examined as the test parameters. The performance of the specimen was evaluated by comparing the test results with the recommended provisions for buckling‐restrained braces. The test results showed that the compression strength capacity of buckling‐restrained brace (BRB) with in‐filled concrete increased by about 10% compared with BRB without in‐filled concrete. According to test result at same story drift of 2Dbm, structural performance of pin connection specimen without bolt slippage is superior to bolted connection specimen. Also, bolted connection specimens showed similar performance for total energy dissipation and cumulative plastic ductility, regardless of the connection types and the existence of concrete filling. Copyright © 2014 John Wiley & Sons, Ltd.
ISSN:1541-7794
1541-7808
DOI:10.1002/tal.1164