For accurately simulating the dynamic mechanical behavior of CFRP-strengthened RC shear wall, a three-dimensional numerical model was proposed in the present study to capture the effect of strain rate on the constitutive relations of concrete, steel bar, CFRP and CFRP-concrete interface. The influences of strain rate, CFRP wrapping method and the number of CFRP layer on the dynamic shear properties and dynamic CFRP shear contribution of CFRP-strengthened RC shear wall were investigated. The results indicated that: 1) as the strain rate increases, the damage of the CFRP-strengthened shear wall became more severe, as evidenced by the increase in the damage area of concrete and CFRP strips; 2) the failure pattern and shear bearing capacity of shear wall was affected by the CFRP layout configurations; 3) the ductility coefficient and energy dissipation capacity increase with an increasing strain rate and CFRP layout configurations. It was to emphasize that, the shear contribution provided by CFRP strips was substantially enhanced subjected to the dynamic loads, especially with the strain rate exceeding 10⁻³ /s, therefore, yielding a significant increase in the overall bearing capacity of CFRP-strengthened shear wall. Moreover, it was found that the degree of enhancement was extensively affected by the CFRP wrapping methods and the number of CFRP layer bundled on the RC shear wall. Based on numerical results, a strain-rate-dependent formula predicting the dynamic shear contribution of CFRP strips was proposed to quantitatively describe influences of CFRP wrapping method and bundled layers.

为了准确模拟 CFRP 加固 RC 剪力墙的动态力学行为，本研究提出了一个三维数值模型来捕捉应变率对混凝土、钢筋、CFRP 和 CFRP-混凝土界面本构关系的影响. 研究了应变率、CFRP包裹方式和CFRP层数对CFRP加固RC剪力墙动剪性能和CFRP动剪贡献的影响。结果表明：1）随着应变率的增加，CFRP加固剪力墙的损伤更加严重，混凝土和CFRP条带的损伤面积增大；2）剪力墙的破坏形式和抗剪承载力受CFRP布局配置的影响；3）延性系数和能量耗散能力随着应变率和CFRP布局配置的增加而增加。需要强调的是，CFRP 条提供的剪切贡献在动态载荷下得到显着增强，尤其是应变率超过 10⁻³ /s，因此，CFRP 加固剪力墙的整体承载力显着增加。此外，还发现增强程度受 CFRP 包裹方法和 RC 剪力墙上捆绑的 CFRP 层数的广泛影响。基于数值结果，提出了预测 CFRP 条动态剪切贡献的应变率相关公式，以定量描述 CFRP 包裹方法和捆绑层的影响。