Experiment Analysis And Seismic Design Method Study On The Multi-ribbed Composite Wall With Steel Concrete Frame Column

Multi-ribbed composite wall with steel concrete frame column is one new structure type, which is based on the multi-ribbed composite wall structural, and is continuous and further research for the multi-ribbed composite wall structure. By the combination of multi-ribbed composite wall and concealed steel side frame column, the wall could keep the many advantages of the multi-ribbed wall; give full play of the characteristics of steel concrete side frame column with good bearing capacity and seismic performance. Meanwhile, the wall would improve the mechanical behavior of multi-ribbed composite wall and play the important role of the multi-ribbed composite wall in the application of middle-high building. In the paper the multi-ribbed composite wall with steel concrete side column would be researched and by the experiment, nonlinear FEM calculation, theory analysis, the stress mechanism, failure mode, seismic behavior, performance of cooperation work and ultimate bearing capacity of the wall have been detailed study. The main research contents and achievements are summarized as follows:(1) By the pseudo-static test of three multi-ribbed composite wall with steel concrete side frame column, the stress feature, failure pattern, bearing capacity, ductility, energy dissipation and deformation of the wall is analyzed. On the basis of experiment, the paper studies the stress mechanism of the wall on the vertical and horizontal load.(2) According to the mechanical characteristics of the multi-ribbed composite wall with steel concrete side frame column, the cooperation work performance of the wall in vertical and horizontal load is studied, further the paper puts forward the elastic foundation beam mechanical model in vertical load and the sandwich composite structural mechanical model in horizontal load. Based on the deformation compatibility principle, a balancing differential equation is established. By solving the equation, the proportion relation of bearing the vertical and horizontal between the side frame column and the composite wall is given. Moreover, theses influencing factors are analyzed.(3) The nonlinear FEM model is established for the wall, using the supranational three-dimensioned solid model, and the analysis results of the FEM and the experimental researches are contrast verification. By using the FEM model, the stress and deformation characteristics of side frame beam, column, ribbed beam and column is analyzed in lateral load and the strain distribution of the side column, ribbed column and filler block is studied in vertical load.(4) By the analysis of experiment and FEM, the factors which influence the axial compression ultimate bearing capacity are studied. The mechanism and role of steel concrete side frame column are mainly studied and the bearing capacity utilization coefficients of the side frame column concrete and the section steel are put forward. According to the numerical simulation results about the wall integral stability coefficient under the axial compression, finally the ultimate bearing capacity calculation equation of the steel concrete side frame column is put forward.(5) Based on the least energy consumption principle, the calculation method of steel concrete side frame column about the cracking load is proposed By the analysis of experiment and FEM models, the factors which influence the oblique section bearing capacity are researched. According to the numerical simulation results, the shear strength equations of each component are discussed, finally the equation of oblique section ultimate bearing capacity of the multi-ribbed composite wall with steel concrete frame column are put forward.(6) Based on the stress plain section assumption, the ultimate flexural strength of the wall is studied and the practical calculation equation of normal section ultimate compression bending bearing capacity is established.(7) According to the features of multi-ribbed composite wall with steel concrete side frame column, the yield curvature and ultimate curvature for the wall is derived by numerical calculation, the curvature and displacement ductility ration are established and all kind of factors influencing the ductility of the composite wall are analyzed. Based on the engineering practice, the limit value of axial compression ration of the wall is put forward.(8) Based on the experimental research, this paper puts forward the elastic and plastic floor displacement angle limit value of multi-ribbed composite wall with steel concrete side frame column and the seismic design method of the wall. Meanwhile, according to the characteristics of multi-ribbed composite wall with steel concrete side frame column, the relevant construction requirements are put forward.