This technology is a buckling-restrained brace for building structures. It features a core member with flange-type connection brackets at both ends, double-encased by a hollow non-bonding member and a reinforcing member, with cantilever-type stiffener units welded into the seating grooves at both ends of the beam member.
Conventional braces suffer from buckling under extreme loads exceeding design seismic loads, leading to a sharp decline in stiffness and strength, unstable behavior, and reduced energy dissipation. Existing buckling-restrained braces designed to address this require concrete filling between the core and the casing, which significantly increases weight, delays construction due to a seven-day curing period, and prevents on-site size adjustments to accommodate tolerances in steel structures.
This technology maximizes the deformation-absorbing section by utilizing stiffener units composed of a panel-type fixing part secured to the seating groove, a bar-shaped support member extending at a lower height with a rounded or multi-faceted end, spacing grooves that create gaps between the support member and the beam, and longitudinal reinforcing protrusions. Synthetic resin elastic buffer pads inside the non-bonding member and elastic contact panel grooves on the beam member reduce friction and impact. Applicable to seismic retrofitting of mid-to-high-rise steel buildings, steel frames for factories and warehouses, and seismic remodeling of public buildings like schools, it allows for the immediate installation of lightweight braces without concrete filling or curing, while ensuring stable hysteretic behavior during large plastic deformations.
This invention was developed with support from the Ministry of Science and ICT through AI-based thermal imaging technology for building forensics.
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