This paper reports the results of a seismic performance study of a precast shear wall with a new horizontal connection. The new connection is the rabbet-unbonded horizontal connection, which is composed of rabbets and unbonded rebar segments. The rabbets are used to improve the shear capacity and prevent slippage of the connection, and the unbonded rebar segments are used to improve the ductility and energy dissipation. Three specimens were tested with different parameters under cyclic quasi-static loading. The test results showed that the specimen with a larger unbonded level had a richer hysteresis curve, larger ductility, larger energy dissipation, and slightly smaller bearing capacity. Moreover, in relation to the stiffness degradation, in the initial stage, the specimen with a larger unbonded level had a smaller stiffness, whereas in the last stage, the stiffnesses were similar regardless of the unbonded level. A parameter analysis using a finite element model proved that the ductility and energy dissipation of a shear wall with the rabbet-unbonded horizontal connection increased with the unbonded length and level. In addition, when the axial compression ratio increased, the bearing capacity increased, but the load–displacement curves decreased more rapidly. It was concluded that the unbonded length and unbonded level could effectively improve the ductility and energy dissipation of a shear wall. However, they should not be too large under high pressure, and the design suggestions for the new connection need further research considering other factors.

中文翻译：

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无榫槽水平连接预制剪力墙试验研究与数值模拟

本文报告了具有新水平连接的预制剪力墙的抗震性能研究结果。新的连接是槽口无粘结水平连接，它由槽口和无粘结钢筋段组成。槽口用于提高抗剪能力和防止连接滑动，无粘结钢筋段用于提高延性和能量耗散。三个试样在循环准静态载荷下以不同的参数进行测试。试验结果表明，未结合水平较大的试件具有更丰富的滞后曲线、更大的延展性、更大的能量耗散和略小的承载力。此外，关于刚度退化，在初始阶段，未结合水平较大的试件刚度较小，而在最后阶段，无论未粘合水平如何，刚度都相似。使用有限元模型的参数分析证明，具有槽口无粘结水平连接的剪力墙的延性和能量耗散随着无粘结长度和水平的增加而增加。此外，当轴向压缩比增加时，承载能力增加，但载荷-位移曲线下降得更快。得出的结论是，无粘结长度和无粘结水平可以有效提高剪力墙的延性和耗能。然而，在高压下它们不应太大，新连接的设计建议需要考虑其他因素进一步研究。使用有限元模型进行的参数分析证明，具有槽口无粘结水平连接的剪力墙的延性和能量耗散随着无粘结长度和水平的增加而增加。此外，当轴向压缩比增加时，承载能力增加，但载荷-位移曲线下降得更快。得出的结论是，无粘结长度和无粘结水平可以有效提高剪力墙的延性和耗能。然而，在高压下它们不应太大，新连接的设计建议需要考虑其他因素进一步研究。使用有限元模型进行的参数分析证明，具有槽口无粘结水平连接的剪力墙的延性和能量耗散随着无粘结长度和水平的增加而增加。此外，当轴向压缩比增加时，承载能力增加，但载荷-位移曲线下降得更快。得出的结论是，无粘结长度和无粘结水平可以有效提高剪力墙的延性和耗能。然而，在高压下它们不应太大，新连接的设计建议需要考虑其他因素进一步研究。当轴向压缩比增加时，承载能力增加，但载荷-位移曲线下降得更快。得出的结论是，无粘结长度和无粘结水平可以有效提高剪力墙的延性和耗能。然而，在高压下它们不应太大，新连接的设计建议需要考虑其他因素进一步研究。当轴向压缩比增加时，承载能力增加，但载荷-位移曲线下降得更快。得出的结论是，无粘结长度和无粘结水平可以有效提高剪力墙的延性和耗能。然而，在高压下它们不应太大，新连接的设计建议需要考虑其他因素进一步研究。