Experiment On Aseismic Behaviors Of R.c. Shear Wall With Concealed Bracings

In this paper a new aseismic consumed energy shear wall, R.C. shear wall with concealed bracings, is studied. The influence of two main parameters, the steel ratio and angle of altitude of concealed bracings, is mainly analyzed. To investigate the actual aseismic behaviors, a group of 11 models of R.C. shear wall with concealed is undertaken under low frequency alternate load. According to the test results, the structural stiffness, capacity, ductility, hysteresity property and energy consuming are studied, and the shear walls with different parameters are compared under different situation. On the test results, through analysis, the four line restoring force model is presented. The mechanical model and formulas of initial stiffness and capacity are established. The calculation results have good agreement with the test results. Based on the test results and analytical research, the rational steel ratio and appropriate angle of altitude of concealed bracings are proposed, which establish a certain extent for the aseismic design of the R.C. shear wall with concealed bracings. The test results and analysis show that the R.C. shear wall with concealed bracings, have 38.96% higher capacity, 43.68% greater ductility, and 176.60% larger energy consuming property than the conventional shear wall without bracings.