轻钢构架钢骨混凝土剪力墙抗震性能试验

Tests on seismic behavior of lightweight-steel framework steel reinforced concrete shear walls

为研究轻钢构架钢骨混凝土剪力墙的破坏形态、滞回特性、承载能力及变形能力等抗震性能,完成了8个剪跨比为2.25试件的拟静力试验。结果表明:试件的破坏形态为压弯破坏,轴压比高的试件墙底混凝土破坏的程度比轴压比低的试件严重;顶点水平力-位移滞回曲线比较饱满,具有较长的峰值承载力稳定段;轴力作用下的受弯承载力试验值大于计算值;极限位移角大于1/100,变形能力随轴压比的增大而减小,边缘构件配箍特征值大的高轴压比墙,同样具有大的变形能力。轻钢构架钢骨混凝土剪力墙的受弯承载力可按钢筋混凝土剪力墙计算,钢骨用等面积钢筋代替,并可考虑轻钢构架C形钢和竖向钢筋的作用。

To study seismic behavior of lightweight-steel framework steel reinforced concrete（SRC） shear walls,quasi-static tests of 8 specimens with shear span ratio of 2.25 were carried out.The test results indicate that the specimens fail in compression-bending mode.Damage of concrete at the bottom of the wall is much serious for the specimens with high axial load ratio than the specimens with low axial load ratio.The top lateral load-displacement hysteretic loops are plump,and the peak lateral load keep stable with a large lateral displacement increment.The ultimate drift ratios of the specimens are larger than 1 /100,and the deformation capacity of the specimens decreases with increasing of the axial load ratio.The walls with high axial load ratio have great deformation capacity when the boundary elements of the wall have a large value of stirrup characteristic ratio.The flexural strength of the lightweight-steel framework SRC shear walls can be calculated by the flexural strength formula of the RC shear walls,and the C type lightweight-steel and the vertical distributed reinforcements can be taken into account.