MODEL TEST OF RC FRAME-SHEAR WALL STRUCTURE WITH PARTIAL COLUMNS SLIDING AT UPPER ENDS

Comparative shaking table tests were conducted for a reinforced concrete (RC) structural model with partial columns sliding at upper ends (Model B) and an ordinary RC structural model (Model A). The two models with an identical plan layout were 1/10-scale, 3-storey and 2-bay by 2-bay frame-shear wall structures, and the second storey of either model was the weak storey. In addition, the mechanical performances of two friction supports were tested to determine the range of a friction coefficient. Test results show that: 1) the average value of the friction coefficient for the friction supports composed of Teflon and stainless steel mirror plates without lubrication oil is about 0.070~0.095, while that with lubrication oil is about 0.014~0.018; 2) the maximum inter-storey drift ratios related to the weak story, the maximum relative displacements related to the top storey, the maximum absolute accelerations related to the weak storey, and the maximum absolute accelerations related to the top storey for Model B under earthquakes with different peak ground accelerations are, respectively, 20%~43%, 17%~32%, 12%~22%, and 7%~33% less than those for Model A; and 3) the maximum inter-storey shear forces related to each floor of Model B are all less than those of Model A. Generally, the aseismic performances of the RC frame-shear wall structures with partial columns sliding at upper ends are better than those of the ordinary RC frame-shear wall structures.