# Parameter Analysis of Resilient Precast Concrete Beam-Column Joints
## 1 Introduction  
Precast concrete structures have been widely used throughout the world due to their outstanding advantages, such as their standardized design, better-controlled construction quality, energy savings, environmental friendliness, rapid construction and lower construction costs [1, 2]. However, according to post-earthquake studies, beam-column connections in precast concrete frame structures are often the most vulnerable parts [3, 4, 5]. In order to improve their seismic performance and reduce post-earthquake destruction, some researchers have devoted themselves to the study of the connection methods between precast members [6, 7, 8]. For example, [PERSON] et al. [9] proposed a method of strengthening reinforced concrete (RC) columns using flexible ropes made of carbon-fiber-reinforced polymer (C-FRP) as an external reinforcement material. Their experimental results demonstrated that the C-FRP ropes extended the axial strain ductility of the RC columns and protected them from collapse, thereby validating the innovative use of C-FRP ropes as external reinforcements for strengthening defective columns. [PERSON] et al. [10] introduced the use of high-strength steel-fiber-reinforced concrete (HSSFC) jackets to strengthen RC columns. They evaluated the effectiveness of HSSFC jackets in improving the seismic performance of RC structures, particularly in enhancing the ductility and energy dissipation capacity of these structures. Their experimental findings revealed that HSSFC jackets effectively prevented shear failure mechanisms and significantly improved the seismic resilience of the structures. Although certain connection methods have excellent seismic performance, these designs often do not fully consider the problem ofpost-earthquake repair. With the proposal of resilient cities, the recoverability of structures after earthquakes has become a focus of attention, and scholars have proposed the concepts of low-earthquake-damage and resilient structures [11; 12]. Based on the above concepts, a restorable functional frame structural system with replaceable energy-dissipating devices was proposed [13], which possessed an excellent energy dissipation capability to ensure that a building could be quickly restored to its functionality after being subjected to earthquakes to minimize economic losses while ensuring the seismic safety of the structure. To achieve this goal, [PERSON], [PERSON], [PERSON], [PERSON] et al. [14; 15] proposed an interchangeable connection method with an energy dissipation device. The core concept of this method was to concentrate the deformation of the structure into a controllable area, and in the event of an earthquake, this area would first undergo plastic deformation and dissipate energy, while the main structure remained elastic, thus significantly reducing the risk of damage to the precast reinforced concrete elements. After the earthquake, the whole structure could be quickly restored to its normal use by replacing the damaged parts. It is therefore important to investigate the seismic performance and recoverability of precast concrete frame structures with replaceable energy-dissipating elements. Based on the above concepts, various precast concrete structures with replaceable energy dissipation have been developed. [PERSON] et al. [16] proposed a novel self-resetting precast concrete beam-column joint with a controllable plastic hinge connection, which utilized a rotating friction damper and a disk spring self-resetting device to withstand bending moments and provide restoring forces. [PERSON] et al. [17] developed a precast joint with a replaceable multi-seam energy-dissipating device with a moment-shear separating controllable plastic hinge to provide good ductility and energy dissipation in precast joints, with the damage concentrated in the multi-seam energy-dissipating device. [PERSON] et al.