足尺钢骨混凝土剪力墙抗震性能试验研究

为探究不同剪跨比下钢骨对足尺剪力墙结构抗震性能的影响,设计了一种适用于超高层建筑物的钢骨栓钉混凝土剪力墙形式,进行2个足尺钢骨混凝土剪力墙和2个钢筋混凝土剪力墙的低周往复荷载试验,对比分析试件的滞回曲线、刚度退化、耗能能力等抗震性能指标。研究表明:剪力墙试件剪跨比较大时,试件发生弯曲破坏;剪跨比较小时,试件发生剪切破坏。相较于钢筋混凝土剪力墙试件,钢骨的加入,减缓了试件裂缝的发展,降低了试件破坏程度,剪力墙试件的承载力、变形能力、延性、整体刚度和耗能能力都得到提高。剪跨比较小的剪力墙试件承载力更大,初始刚度、耗能能力明显增强,但延性较低。钢骨、栓钉、混凝土协同工作能力良好。

Experimental research on seismic behavior of full-scale steel reinforced concrete shear wall

In order to explore the influence of steel on the seismic performance of full-length shear wall structure under different shear span ratio, a new form of steel-bolt-concrete shear wall is designed for super-high-rise buildings. Two full-scale steel reinforced concrete shear walls and two reinforced concrete shear walls were tested under low cyclic loading for comparison of hysteretic curve, stiffness degeneration and energy dissipation between them. The results show that bending failure occurs when the shear wall specimen has a large shear span ratio, while shear failure occurs when the shear span ratio is small. Compared with the reinforced concrete shear wall specimens, the shear walls with steel present slower development of cracks and slighter damage degree.The bearing capacity, deformation capacity, ductility, overall stiffness and energy dissipation capacity of shear wall specimens reinforced with steel have been improved.The shear wall specimens with small shear span ratio have higher bearing capacity, initial stiffness and energy dissipation capacity but the ductility is low. The steel, bolts and concrete work well together.