A new precast self-centering concrete wall structure is presented, namely a set of slip-friction energy dissipating devices is installed at the wall toe. The opening and closing of the walls’ corner joints under earthquakes drives slip-friction connectors to provide frictional energy dissipation capacities. In this paper, the influences of four parameters including bolt’s slot length (SL), friction force, connection plate thickness and initial prestress force ($f_{p0}$) of PT tendons on the seismic performance of the new precast self-centering concrete wall are systematically investigated. The results show that: 1) The bolt’s SL has no effect on the initial stiffness and critical load of the wall, but the ultimate lateral-load capacity continues to decrease with the increase of SL. 2) The larger the friction force of the connectors, the worse the self-centering capacity, but the better the energy dissipation capacity of the specimen. 3) The connection plate thickness t has little effect on the self-centering capacity and energy dissipation capacity of wall. However, the wall’s ultimate lateral-load capacity increases continuously with the increase of the plate thickness. 4) With the increase of $f_{p0}$, the self-centering capacity of specimen is significantly improved, but the energy dissipation capacity is reduced. It is necessary to reasonably control the initial prestress level of the PTs during design, which is very important to obtain the balance between the self-centering capacity and the energy dissipation capacity of the wall for the best behavior.

提出了一种新型的预制自定心混凝土墙结构，即在墙脚趾处安装了一套滑动摩擦消能装置。地震作用下墙角连接处的打开和关闭会驱动滑动摩擦连接器，以提供摩擦耗能能力。本文研究了螺栓槽长（SL），摩擦力，连接板厚度和初始预应力四个参数的影响（$F_{p0}$PT筋对新型预制自定心混凝土墙的抗震性能进行了系统研究。结果表明：1）螺栓的SL对墙体的初始刚度和临界载荷没有影响，但极限侧向承载力随着SL的增加而持续减小。2）连接器的摩擦力越大，自定心能力越差，但样品的耗能能力越好。3）连接板的厚度t对墙的自定心能力和能量消散能力影响很小。然而，随着板厚度的增加，墙的极限侧向承载能力不断增加。4）随着$F_{p0}$，样品的自定心能力大大提高，但能量耗散能力却降低了。在设计过程中必须合理地控制PT的初始预应力水平，这对于获得最佳性能的墙的自定心能力和能量消散能力之间的平衡非常重要。