An Experimental Study on Mortar-Filled Buckling-Restrained Mechanism

Abstract:

Buckling-restrained braces (BRBs) have been widely used in earthquake resistance structure systems, which are designed to yield in both tension and compression. Among most mortar filling BRBs, the bearing capacity in compression is higher than in tension particularly at large displacement. This leads the joints to suffer extra force and thus unfavorable for structures. This paper presents a set of experimental results of BRBs with different unbonding materials and specific nonyielding segments. Four models with different unbonding materials are tested in axial compressive with stationarily increased displacement amplitudes. These models are all featured with reinforced nonyielding segments to prevent lateral buckling. Both experimental and numerical results indicate that epoxy resin is the best unbonding material that can avoid transferring the axial force to the restrained part and the new reinforcement in nonyielding segments can effectively prevent lateral buckling.

• Periodical: Applied Mechanics and Materials (Volumes 351-352)
• Pages: 1537-1541
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.351-352.1537
• Online since: August 2013
• Authors: Rui Teng, Yuan De Lei, Tao Wang
• Keywords: Buckling Restrained Brace (BRB), Nonyielding Segment, Unbonding Material

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