application field

The buckling restrained energy dissipation support structure system not only meets the requirements of lateral stiffness of the structure, but also avoids the disadvantage of buckling of ordinary supports under compression. It has good hysteresis energy dissipation capacity and is widely used, which can be used in new construction projects and seismic reinforcement and renovation of existing buildings.

Its application areas include: high-rise buildings, sports venues, airports, cultural and health facilities, exhibition centers, industrial plants

working principle

The working principle of Buckling Constrained Braces (BRBs) is based on the analysis of their core load-bearing elements; mdash; & mdash; Mechanical behavior control of the core board.

This component consists of three parts:

Core unit: A core plate made of high-strength steel that can withstand axial tension and pressure.

Constraint unit: usually filled with non bonded material inside steel pipes, its function is to provide continuous lateral constraint for the core unit.

Non bonded material layer: located between the core and the constraint element, ensuring that the core can freely expand and contract under stress, avoiding shear coupling with the constraint element.

When the structure undergoes deformation and the BRB is subjected to axial pressure, the constraint element effectively suppresses the lateral bending (i.e. buckling) that may occur in the core element due to compression through its own stiffness and strength. This constraint enables the core unit to achieve full cross-sectional yielding under both tensile and compressive stress states, thereby dissipating seismic energy into thermal energy through the plastic deformation of the steel.

Therefore, through the constraint mechanism, BRB transforms the compressive bearing capacity of the core from being controlled by its bending stiffness to being controlled by the constraint capacity of the constraint elements, making its hysteresis curve full and symmetrical, and significantly higher energy dissipation efficiency than ordinary supports.