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钢筋混凝土剪力墙塑性铰长度对剪力墙延性和耗能能力有重要影响,而已有的剪力墙塑性铰长度计算模型给出的主要影响因素各有不同。为了准确确定剪力墙塑性铰长度的主要影响因素,选取88片不同配筋参数下剪力墙的分析模型,用有限元分析软件ABAQUS系统地分析不同剪跨比、轴压比和配筋率对塑性铰长度的影响,进而用MATLAB软件回归分析单一因素对塑性铰长度影响,在此基础上,进一步拟合提出了多参数综合影响下的塑性铰长度计算模型。与已有的剪力墙试验数据进行对比,拟合的模型计算所得的极限位移相对误差在15%以下,计算结果与试验结果吻合良好。
The length of plastic hinge in RC shear wall has an important influence on the ductility and energy dissipation capacity of shear wall. However, the main influencing factors given by the existing calculation model of plastic hinge length in RC shear wall are different. In order to accurately determine the main influencing factors on the length of plastic hinge, the analysis model of 88 shear walls with different reinforcement parameters is selected. The finite element analysis software ABAQUS is used to systematically analyze the different ratios of shear span, axial compression ratio and reinforcement ratio Then, the influence of single factor on the length of plastic hinge was analyzed by MATLAB software. Based on this, the model of plastic hinge length under the influence of multi-parameter synthesis was proposed. Compared with the existing shear wall test data, the relative error of the limit displacement calculated by the fitted model is below 15%, and the calculated results are in good agreement with the experimental results.