The Resilient Slip Friction Joint (RSFJ) is a relatively new friction damper developed and introduced in New Zealand. It is used in structures to dissipate the earthquake energy with the advantage of re-centring the structure back to its upright position. This paper investigates the experimental and analytical behaviour of the RSFJ when it is affected by the second-order effect (SOE) both in the damper in-plane and out-of-plane cases due to possible inherent imperfection in reality. The main consequences of SOE is firstly the reduction of the axial force capacity, stiffness of the damper and in return the structure, change in damping ratio. All of these may end up changing the effective period and seismic response of the structure. The ultimate catastrophic effect of SOE might be the failure of the damper if it is not properly designed for it in advance. From this perspective, this paper proposes some analytical expressions for the prediction of the damper response when it is affected by SOE. Furthermore, it investigates the effect of boundary conditions on SOE and provides some recommendations so that the SOE is minimized.

弹性滑动摩擦接头（RSFJ）是在新西兰开发和引入的相对较新的摩擦阻尼器。它用于结构中以消散地震能量，其优点是使结构重心重新回到其竖立位置。本文研究了阻尼器平面内和平面外受二阶效应（SOE）影响的RSFJ的实验和分析行为可能是由于现实中可能存在的固有缺陷所致。SOE的主要后果是首先减小了轴向力，减小了阻尼器的刚度，进而降低了结构的阻尼比。所有这些最终可能会改变结构的有效期和地震响应。SOE的最终灾难性后果可能是，如果阻尼器事先没有适当设计，则会导致其失效。从这个角度出发，本文提出了一些阻尼器响应受SOE影响时的预测分析表达式。此外，它研究了边界条件对SOE的影响并提供了一些建议，以使SOE最小化。