Experimental investigation on seismic performance of RC shear walls reinforced with CFRP bars in boundary elements to enhance the resilience was presented which is expected for stable resistance capacity and small residual deformation. Six RC shear walls reinforced with CFRP bars as longitudinal tensile materials in boundary elements were tested under reversed cyclic lateral loading while subjected to constant axial compression with different axial load ratios of 0.17, 0.26 and 0.33, respectively. Two forms of stirrups were used for each axial load ratio, which were rectangular and circular stirrups in boundary elements. A reference specimen, ordinary RC shear walls, was also introduced to certify the excellence of CFRP bars. The test results indicated that the walls utilizing CFRP bars had small residual deformations and residual crack widths. Lower crack propagation height and larger concrete crushing region, bearing capacity and equivalent viscous damping coefficient (EVDC) could be observed with the increase of axial load ratios. The effects of stirrup forms on experimental results had a relation to the axial load ratio. When the axial load ratio was small, the shear walls with circular stirrups had better energy dissipation than that with rectangular stirrups at a given drift level, while the cumulative energy dissipation (CED) were similar. With the increase of axial load ratio, the walls exhibited similar energy dissipation at the same drift level, however, the shear walls with rectangular stirrups had larger CED.

中文翻译：

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边界元CFRP钢筋钢筋混凝土剪力墙抗震试验研究

提出了在边界元件中用CFRP筋加固以增强回弹力的RC剪力墙抗震性能的试验研究，该剪力墙具有稳定的抗力能力和较小的残余变形。六块钢筋混凝土剪力墙作为边界单元中的纵向抗拉材料，在反向循环横向荷载下进行了测试，同时承受了不同轴向荷载比分别为0.17、0.26和0.33的恒定轴向压缩。每种轴向载荷比使用两种形式的箍筋，即边界单元中的矩形和圆形箍筋。还引入了一个参考样本，即普通 RC 剪力墙，以证明 CFRP 钢筋的卓越性。试验结果表明，采用CFRP筋的墙体残余变形小，残余裂纹宽度小。随着轴向载荷比的增加，可以观察到较低的裂纹扩展高度和较大的混凝土破碎区域、承载能力和等效粘滞阻尼系数（EVDC）。箍筋形式对试验结果的影响与轴向载荷比有关。当轴向荷载比较小时，在给定的漂移水平下，圆形箍筋的剪力墙比矩形箍筋的剪力墙具有更好的能量耗散，而累积能量耗散（CED）相似。随着轴向荷载比的增加，在相同的位移水平下，墙体表现出相似的能量耗散，而矩形箍筋剪力墙的 CED 更大。随着轴向载荷比的增加，可以观察到承载能力和等效粘性阻尼系数（EVDC）。箍筋形式对试验结果的影响与轴向载荷比有关。当轴向荷载比较小时，在给定的漂移水平下，圆形箍筋的剪力墙比矩形箍筋的剪力墙具有更好的能量耗散，而累积能量耗散（CED）相似。随着轴向荷载比的增加，在相同的位移水平下，墙体表现出相似的能量耗散，而矩形箍筋剪力墙的 CED 更大。随着轴向载荷比的增加，可以观察到承载能力和等效粘性阻尼系数（EVDC）。箍筋形式对试验结果的影响与轴向载荷比有关。当轴向荷载比较小时，在给定的漂移水平下，圆形箍筋的剪力墙比矩形箍筋的剪力墙具有更好的能量耗散，而累积能量耗散（CED）相似。随着轴向荷载比的增加，在相同的位移水平下，墙体表现出相似的能量耗散，而矩形箍筋剪力墙的 CED 更大。在给定的漂移水平下，具有圆形箍筋的剪力墙比具有矩形箍筋的剪力墙具有更好的能量耗散，而累积能量耗散（CED）相似。随着轴向荷载比的增加，在相同的位移水平下，墙体表现出相似的能量耗散，而矩形箍筋剪力墙的 CED 更大。在给定的漂移水平下，具有圆形箍筋的剪力墙比具有矩形箍筋的剪力墙具有更好的能量耗散，而累积能量耗散（CED）相似。随着轴向荷载比的增加，在相同的位移水平下，墙体表现出相似的能量耗散，而矩形箍筋剪力墙的 CED 更大。