| At present,The domestic and overseas research on the seismic performance analysis of eccentrically braced SRC column and steel beam mixed frame rarely,This thesis mainly studies on the seismic performance of the frame with finite element analysis software SAP2000V15.0and ETABS9.0. The main work and research contents are as follows:(1) Make contrastive analysis about the effects of the different energy beam length and height on the D-type and K-type supported SRC column-S beam mixed frame seismic performance,The analytical results show that:①Under the condition when energy beam length meet the shear yield, D-type bracing stiffness is less than the K-type, but the ductility and energy dissipation capacity is superior to the K-type;②Two types of support stiffness and ductility are on the decreasing trend as the height increases.(2) The seismic behavior of D-type eccentrically braced frame,D-type concentrically braced frame and pure frame in the elastic stage has been analyzed by the response spectrum and the nonlinear time history analysis method. The results show that:The seismic performance of the mixed frame with concentrically braced mixed frame is superior to pure mixed frame.but inferior to D-type Eccentrically Braced.(3) Under the analysis of rare earthquake of7degrees, Each of the internal force change of D-type eccentrically braced SRC column and S beam mixed frame with different length of link beam has been analyzed by The time history analysis method. The results show that:When the length of link beam is gradually reduced,D style eccentrically braced frame support and frame columns under axial pressure gradually increase,This shows that support has played a second line of defense after yielding of the link beam,effectively shared by the shear frame column, At the same time,This thesis put forward the Suggestion of using long energy beam design Under the condition that the length of link beam meets the shear yield。... |
PDF Full Text Request