Performance Research Of CFT And Frame-shear Wall Structure With Semi-rigid Connection

The national researches on CFT structure at present mainly focused on static and dynamic analysis to structural basic members or beam-column joints. However, there are few literature reports of work capability researches on frame-shear wall structure which consists of CFT column and shear wall, and there are no design calculating methods on CFT frame-shear wall structures, and in actual engineering structural design, the steel beam to column joints of CFT are assumed as pinned or rigid, according to the traditional frame design method. In fact, the effect of beam-column joints stiffness cannot be ignored for the whole structural behavior, so it has an important instructional meaning for engineering application of CFT structures to discuss joints stiffness to structural deflection and seismic response rules.In tall building structural design, the structural lateral sway is considered as an important controls parameter. We firstly use ABAQUS finite element software to do factors analyses on structural lateral sway behavior of several groups of CFT frame-shear structure with semi-rigid connection, and then by analyzing the affecting rules of each factor to the structural lateral sway, we find out thatλ, structural eigenvalue of stiffness considering several factors, is most pivotal to the lateral sway of frame-shear structure with semi-rigid connection, so we make a design chart based on sway flexible factorηunder structural stiffness eigenvalueλto forecast lateral sway of CFT frame-shear structure with semi-rigid connection combined with rigid frame sway calculating formula, so as to provide the designers with great conveniences.On structural seismic behavior analysis, in the paper we firstly use ABAQUS to do mode analysis on CFT frame-shear structure with different joints stiffness, and it shows that joints stiffness has a significant influence on structural lower frequencies, but little influence on higher frequencies. Then we use ABAQUS to simulate the dynamic responses of CFT frame-shear structure with different joints stiffness under earthquake excitation, and it shows that the stiffness variety does not associated with the maximum dynamic response variety. The seismic response analysis on actual structures shows that it will cause deviation to analyze frame with semi-rigid connection according to the response spectral analysis used in design code.