## 3 Results and Discussion
### Strain of Rebars  
The force-strain curves of the outermost longitudinal rebars of the edge members of the specimens LSW and LAPC-1 at the position of 10 mm above the base beam are shown in Figure 12, where the tensile strain was defined as a positive value and the compressive strain was negative. The yield strain of the rebar measured by the test was about 3000 \(\times\) 10\({}^{-6}\). Due to the poor correlation between the strain and the horizontal force after the rebar yielded, the data with a strain less than 3000 \(\times\) 10\({}^{-6}\) was considered in the analysis. It is apparent from Figure 12 that the trend of load-strain curves of the outermost rebars of the edge members of specimens LAPC-1 and LSW was basically identical. However, when the outermost rebar was under tension, the strain value of the rebar of specimen LAPC-1 was larger, and when the outermost rebar was under compression, the strain value of the rebar of specimen LAPC-1 was smaller. The main reason was that high-strength grouting materials were used in the joints of prefabricated specimens, which reduced the force of rebars in the same section to some extent. In addition, the crack occurred early at the grouting joint of the prefabricated specimen LAPC-1, which made the stress of the rebar during tension greater. \begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline \multirow{2}{*}{**Specimen**} & \multicolumn{8}{c}{**Displacement/mm**} \\ \cline{2-9}  & **6** & **10** & **16** & **24** & **36** & **42** & **48** & **54** \\ \hline LSW & 0.092 & 0.068 & 0.071 & 0.073 & 0.087 & 0.102 & 0.191 & - \\ \hline LAPC-1 & 0.067 & 0.069 & 0.062 & 0.066 & 0.086 & 0.111 & 0.207 & - \\ \hline LAPC-2 & 0.063 & 0.060 & 0.057 & 0.068 & 0.088 & 0.100 & 0.114 & 0.134 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: The equivalent viscous damping coefficient of each specimen at different stages. Figure 12: Force-strain curves of the rebars of specimens LSW and LAPC-1 at 10 mm above the base beam: (**a**) the outermost longitudinal rebars of the straight-edge member; and (**b**) the outermost longitudinal rebars of the L-shaped-edge member. Figure 13 shows the force-strain curves of the outermost longitudinal rebars of the edge members of specimens LSW and LAPC-2 at the position of 10 mm above the base beam. Due to the problem of the data acquisition system, the strain data of the outermost longitudinal rebars at the corner of the L-shaped-edge members of LAPC-2 could not be obtained. It can be seen from Figure 13 that the shape of the load-strain curves of the outermost rebars in the edge members of specimens LAPC-2 and LSW was similar. when the outermost rebar was under tension, there was a small difference between specimen LAPC-2 and the cast-in-place specimen in the strain value of the rebar, while when the outermost rebar was compressed, specimen LAPC-2 had a smaller strain value of rebar for the same reason as LAPC-1. In general, the shape of the force-strain curves of rebars at the joints of the two prefabricated specimens was similar to that of the cast-in-place specimen, indicating that the connection of the sleeves at the joints was reliable. Figure 14 shows the force-strain curves of the outermost longitudinal rebars of the straight-edge members of specimens LAPC-1 and LAPC-2 at the position of 10 mm above the base beam and sleeves. It can be seen from Figure 14 that the reinforcement under the sleeve was subjected to a larger force during tension, resulting in a larger strain value of the reinforcement. In general, the shape of the force-strain curves of the reinforcement above the sleeve and the base beam was basically the same, indicating that the APC sleeve could effectively transmit the reinforcement stress in the L-shaped shear wall. Figure 14: Force-strain curves of the outermost longitudinal rebars of the straight-edge member at 10 mm above the base beam and sleeves of LAPC-1 and LAPC-2: (**a**) LAPC-1; and (**b**) LAPC-2.