内置暗支撑钢筋混凝土剪力墙具有施工方便、承载力高和延性好等一系列优点。本文在6片一字型足尺内置暗支撑剪力墙低周往复荷载作用试验的基础上，采用四折线恢复力模型对其滞回曲线进行模拟，并给出关键点的计算公式，得到了内置暗支撑钢筋混凝土剪力墙的恢复力模型。经验证，该恢复力模型模拟效果良好，能够较好地反映构件的抗震性能，为内置暗支撑钢筋混凝土剪力墙结构进行弹塑性地震反应分析，奠定了理论基础。同时，本文利用MATALAB进行了基于刚度退化数据的回归分析，得到了刚度退化的计算公式。研究表明，剪力墙水平位移的变化是其刚度退化的宏观结果，其水平位移主要与内置暗支撑剪力墙的剪跨比、轴压比等因素有关。
Abstract
A reinforced concrete shear wall with concealed bracings has a series of advantages such as convenient construction, high bearing capacity, and ductility.Based on experimental study on six one-font reinforced concrete shear wall with concealed bracings under low-cycle load, the hysteretic loop curves were simulated and given the formula of key points by using the resilience mode.The resilience model has good simulation result, and it can show the seismic performance of the component pretty well, which lay a theoretical foundation for the elastoplastic seismic response analysis of the reinforced concrete shear wall with concealed bracings.Then, a regression model quantifying the stiffness degradation was proposed based on the stiffness degradation data using the MATLAB.The result shows that the horizontal displacement of shear wall is the result of its stiffness degradation, and the horizontal displacement of shear wall is mainly related to the shear span ratio and the axial compression ratio.
关键词
剪力墙 /
暗支撑 /
恢复力模型 /
刚度退化
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Key words
shear wall /
concealed bracings /
resilience model /
stiffness degradation
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