Simulation Analysis And Experiment Research On The Buckling-Restrained Braces

As the incensement of the economic level and the knowledge on the earthquake disaster, anti-seismic design as an important means to ensure the persons'safety and reduce the loss of property is get more and more research by scholars of most countries. The traditional frame-work for its simple structural form is gained wide application. However, because of its earth-quake resistance is not excellent; people consider strengthening the resistance by setting the braces.Traditional steel support can show good dissipation ability, but under the axis pressure, the support is prone to lose its back since its weaker resistance. Buckling-restrained brace (BRB) is the improvement of traditional steel support. From the experiment, BRBs could break under yield stress, and hysteresis curve is full, round as well as anti-seismic perfor-mance excellent.From 1970s, Japanese scholars creatively give a concept of BRB; BRBs get a widely re-search and application nowadays. In the Northridge earthquake of 1994 and the Kobe earth-quake of 1995, houses with BRBs were tested in an actual surrounding. From the investiga-tion, BRBs can keep the house against collapsed; and less people died.Base on the BRB's experimental studies, a more detailed Abaqus finite element analysis is given, which includes the influence factors for the dissipation ability. In the analysis, an emphasized research is the simulation of rubber, which is unbonded layer of the BRBs.Secondly, BRBs are installed on a practical framework, and simulation gives a contrast against the existing framework structure without BRBs.Finally, analysis of economy is given on the condition of structure with BRBs, as well as the design advices.