In this study, the use of the displacement-based fibre element (DBFE) method for modelling the nonlinear seismic response of reinforced concrete shear wall structures with a variation of damping ratios and types of structural damping is evaluated. The experimental seismic responses of the CAMUS I and NEES-UCSD shear wall structures are compared with nonlinear time-history analysis results obtained using the DBFE method. Comparisons are made in terms of the absolute maximum values of the top displacement, the base shear force, the base bending moment values and minimum differences between overlaps of top displacement time-history graphs. The Hilber-Hughes-Taylor-α integration method is selected for the dynamic solution algorithm. Recommendations are made for appropriate damping ratios for stiffness-proportional, mass-proportional, and Rayleigh damping to be used for the structural damping of nonlinear seismic analyses of the shear walls. The minimum difference between experimental and numerical analysis results is obtained less than 11% using Rayleigh damping. Additionally, the optimal number of fibre elements is researched with regard to the ratio of the mean length of the fibre elements to the longitudinal length of the shear wall. When the ratio is smaller than 3%, the differences between experimental and numerical analysis results for both shear walls are less than 2% at the optimal damping ratios.

中文翻译：

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钢筋混凝土剪力墙非线性地震分析不确定度研究

在这项研究中，使用基于位移的纤维单元 (DBFE) 方法对钢筋混凝土剪力墙结构的非线性地震响应进行建模，并评估了阻尼比和结构阻尼类型的变化。CAMUS I 和 NEES-UCSD 剪力墙结构的实验地震响应与使用 DBFE 方法获得的非线性时程分析结果进行了比较。比较了顶部位移的绝对最大值、基础剪力、基础弯矩值和顶部位移时程图重叠之间的最小差异。动态求解算法选择Hilber-Hughes-Taylor-α积分法。针对刚度成比例、质量成比例、瑞利阻尼用于剪力墙非线性地震分析的结构阻尼。使用瑞利阻尼获得的实验和数值分析结果之间的最小差异小于 11%。此外，根据纤维单元的平均长度与剪力墙的纵向长度的比率，研究了纤维单元的最佳数量。当该比率小于 3% 时，在最佳阻尼比下，两种剪力墙的实验和数值分析结果之间的差异均小于 2%。根据纤维单元的平均长度与剪力墙纵向长度的比值研究了纤维单元的最佳数量。当该比率小于 3% 时，在最佳阻尼比下，两种剪力墙的实验和数值分析结果之间的差异均小于 2%。根据纤维单元的平均长度与剪力墙纵向长度的比值研究了纤维单元的最佳数量。当该比率小于 3% 时，在最佳阻尼比下，两种剪力墙的实验和数值分析结果之间的差异均小于 2%。