# Parameter Analysis of Resilient Precast Concrete Beam-Column Joints
## 5 Conclusions  
In this study, numerical models of concrete beam-column joints with replaceable energy-dissipating devices were developed using ABAQUS based on experimental data. The damage patterns and hysteresis curves of the specimens were obtained through a finite element analysis to verify the rationality of the model. On this basis, the thickness of the H-beams' web and the length, width and number of openings in the REDDC were parametrically analyzed, and the following conclusions were drawn:  
1. As the thickness of the H-beams in the REDDC increased, the load-bearing capacity of the beam-column joints gradually increased, but their energy dissipation capacity gradually decreased. When considering members with replaceable energy-consuming devices, it was necessary to pay attention not only to their energy-consuming capacity but also to their ultimate load capacity.
2. A length of the H-beam openings in the REDDC in the range of 100-110 mm and a width of 20\(\sim\)25 mm had no significant effect on the ultimate load-carrying capacity of the beam-column joints. As the length of the openings increased, the energy dissipation capacity was increased by 39.4-72.84%, but the ultimate load-carrying  
Figure 19: Comparison of finite element results for the models with different number of openings in H-shaped steel.  
Figure 18: Mises stress contours at 40 mm displacement.  
capacity gradually decreased by 7.78-13.53%. As the width of the openings increased, the energy dissipation capacity was significantly increased by 50.38-115.81%, but the ultimate load capacity gradually decreased by 10.69-24.88%. Compared with the effect of opening length on the REDDC, the effect of opening width on its energy dissipation capacity was more significant.
3. In the REDDC structures, the number of openings in the H-beams was a key parameter that directly affected their load-carrying capacity and energy-consuming capacity. With an increase in the number of openings, the peak load-bearing capacity showed a gradual decreasing trend, while at the same time, the energy-consuming capacity showed a gradual increasing trend.  
The current research focused on exploring the characteristics of precast concrete beam-column joints with replaceable energy dissipation devices. To clarify the inherent working principles and seismic performance of this connection method further, future research should extend to the overall framework level. This can be achieved by conducting practical experiments and numerical simulations to evaluate its performance in real engineering projects at a larger scale and from a broader perspective, thereby enriching and improving the existing connection technology system.  
Conceptualization, Q.G. and Y.L.; Methodology, Q.G.; Investigation, Y.L.; Writing--original draft, Y.Y.; Supervision, Q.G. All authors have read and agreed to the published version of the manuscript. Funding was received from the Natural Science Foundation of Science and Technology Department of Sichuan Province, under Grant Number 2022 NSFSC1104. Institutional Review Board Statement: Not applicable. Informed Consent Statement: Not applicable. Data Availability Statement: The data presented in this study are available on request from the corresponding author. The data are not publicly available due to follow-up needs to be researched. The authors are also grateful to the technicians in the laboratory for helping to make the specimens. Conflicts of Interest: The authors declare no conflict of interest.