## 3 Results and Discussion
### Energy Dissipation Capacity  
The energy dissipation capacity of the specimens was evaluated by the equivalent viscous damping coefficient \(\zeta_{\text{eq}}\)[31], which can be calculated as follows:  
\[\zeta_{\text{eq}}=\frac{S_{\text{ABCD}}}{2\pi(S_{\text{OBE}}+S_{\text{ODF}})} \tag{5}\]  
where \(S_{\text{ABCD}}\) is the area of the hysteresis loop, and \(S_{\text{OBE}}\) and \(S_{\text{ODF}}\) represent the area of the triangle in Figure 11. Among the loading levels of the three cycles, the specimens had damage accumulation in the second and third loading cycles, so only the first loading cycle was considered in the calculation. The relationship between the equivalent viscous damping coefficient \(\zeta_{\text{eq}}\) of each specimen and the horizontal displacement is shown in Figure 11.  
In the previous research on the prefabricated wall connected with traditional grouted splice connectors [16], the equivalent viscous damping coefficient of the prefabricated walls was lower than that of the cast-in-place wall at the later stage of test due to the slip of the connecting reinforcements and the larger crack width of the post-cast joint. In this test, it can be seen from Figure 11 that the equivalent viscous damping coefficient of all specimens increased with the increase of the horizontal displacement after the reinforcement yielded, and the equivalent viscous damping coefficient-horizontal displacement curve of LAPC-1 was similar to that of LSW. However, the equivalent viscous damping coefficient of specimen LAPC-2 was smaller than that of the other specimens at the later loading stage. This was mainly due to the larger crack width at the grouting joint during the failure of specimen LAPC-2, which led to the reduction of the energy dissipation capacity of the specimen to a certain extent. Therefore, to improve the bonding property of the surface of the grouting joint, it is recommended that the bottom of the prefabricated specimen and the top surface of the foundation be properly chiseled.  
In reference [25], the spacing of stirrups and horizontally distributed reinforcements at the bottom of prefabricated walls was 50 mm, while that of the cast-in-place wall was  
Figure 11: Equivalent viscous damping coefficient displacement curve of specimens.  
100 mm. The results showed that the energy dissipation capacity of straight prefabricated walls connected with APC connectors was better than that of the cast-in-place wall. Similarly, in practical projects, the spacing of stirrups and horizontally distributed reinforcements at the bottom of the cast-in-place wall were not encrypted. However, in this test, in order to compare with the prefabricated wall, the stirrups and horizontally distributed reinforcements at the bottom of the cast-in-place wall were encrypted with a spacing of 50 mm, which resulted in the higher energy dissipation capacity of the cast-in-place wall to some extent. The equivalent viscous damping coefficient \(\zeta_{\text{eq}}\) of each specimen at different stages is shown in Table 4. It can be seen from Table 4 that, at the same loading stage, the viscous damping coefficients of all specimens were basically the same before the failure of specimens, which indicates that they had similar energy dissipation capacities on the whole.