Seismic Energy Dissipation Analysis of y and K Type Composite Eccentrically Braced Steel Frames

Abstract

In order to study the seismic behavior of eccentrically braced frames with different braces, nonlinear finite element analysis of two eccentrically braced frames with Y and K shapes is carried out by using the software ABAQUS. Q235 steel is used in the K and Y shaped energy dissipation section and support in composite steel frames, and the other components are composed of Q345 and Q460 grade steel respectively. The analysis results show that both of them have good energy dissipation under the low cyclic loading; Under the same amount of steel., with the steel grade increases for the frame beam and column, the energy dissipation capacity of Y and K shape has greatly improved, the energy dissipation capacity of link beam Y shape frame is better than that in K shape frame; the overall energy consumption ability of Y shape frame is also better than that of K shape frame, and Y shape frames have many advantages such as easy repair after the earthquake, save steel, and high economic benefit.