带暗柱的双钢板高强混凝土组合剪力墙抗震性能分析

Seismic Behavior of Double Skin Composite Walls with Concealed Columns

双钢板高强混凝土组合剪力墙是由双层钢板内填高强混凝土构成的一种新型高层建筑抗侧力构件。本文进行了3个试件的低周反复加载试验,试件的破坏模式为钢板屈曲后混凝土压溃。试验结果表明双钢板高强混凝土组合剪力墙具有较高的承载力和良好的变形能力。在试验研究的基础上建立了有限元模型进行单调加载推覆分析,研究了轴压比、剪跨比、距厚比和配筋率等参数对剪力墙抗震性能的影响,最后推导了组合剪力墙的极限承载力计算公式。

Double skin composite wall with concealed column is a new type of lateral force-resisting system for high-rise buildings, which comprises two steel plates connected by tie bars and an infill of high strength concrete. In this paper, three wall specimens subjected to cyclic lateral loading are tested. The specimens are failed from local buckling of the steel plates and subsequent concrete crushing. Test results show that double skin composite wails have good load-carrying capacity and deformation capacity. Finite element models are constructed and validated through comparisons to test data. Monotonic pushover analysis is performed to investigate key parameters influencing the seismic behavior of composite walls. The parameters are axial compressive ratio, shear span ratio, the ratio of the tie bar spacing to steel plate thickness, reinforcement ratio. The simplified formulation is proposed to evaluate the lateral load-carrying capacity of the double skin composite walls, which provides satisfactory predictions.