Study On Seismic Behavior Of Steel Frame With Single Skew Bar Buckling And Eccentrically Braced

Buckling-restrained brace(BRBs)is a kind of axial bearing member which can reach the yield state either under compression or under tension,and it can dissipate a lot of seismic energy.Therefore,the response state of the structure under earthquake is reduced effectively.Because the buckling braces only yield and do not buckle,the anti-buckling braces can provide great lateral stiffness during small earthquakes.They can also be used as dampers to dissipate seismic energy and protect the overall stability of the structure during moderate and large earthquakes.Therefore,buckle-resistant braces have a broad development prospect and research space in engineering.In this paper,the development and research status of high-rise steel structures and eccentrically braced steel frames are briefly introduced,and then the development of buckling braces at home and abroad is described.Secondly,the structural form and working principle of buckling braces(deformation history and energy dissipation principle)are studied,and the stability of buckling braces is analyzed.The design of steel frame with single skew rod eccentrically braced is carried out,including the design of eccentrically braced steel frame and the design of anti-buckling bracing,as well as the discussion of analysis method and the selection of seismic wave.Finally,using the nonlinear time history analysis method of ANSYS software,this paper analyzes and discusses the steel frame with single skew rod eccentrically braced steel frame with anti-buckling support and the steel frame with single inclined bar eccentrically braced steel frame with common bracing.The EL-CENTRO wave is selected as an example,and the displacement from the vertex is obtained.The five aspects of peak acceleration,floor displacement,floor displacement and interstory displacement angle are compared.It is concluded that under the earthquake of 8 degrees,the buckling braced frame structure has better energy dissipation performance.Can better protect the overall stability of the structure.