## 5 Conclusions and Future Work  
Based on the results of this research, the PEC columns have the advantages of high strength and stiffness. Due to these advantages of PEC columns, it is very suitable to be used as the vertical edge member of steel plate shear wall structure. In this paper, a single-span 1/3 specimen of steel plate shear wall with PEC columns is tested under cyclic loading, and the results of the test and finite element are compared. The influence of basic parameters such as height-thickness ratio, strength grade of concrete and axial compression ratio on its bearing capacity and hysteretic behavior is analyzed by finite element software. Finally, the research results are summarized, and the following conclusions are drawn.  
1. It is found that the steel plate shear wall with PEC columns has better mechanical properties and superior seismic performance by finite element analysis and test research. The results show that the introduction of PEC columns into steel plate shear walls plays an outstanding role in improving the seismic performance of steel plate shear wall and exerting the advantages of deformation and energy dissipation of the infill steel plates.
2. The hysteretic behaviors of steel plate shear wall with PEC columns are stable, and the hysteretic curves are relatively full. The energy dissipation capacity is stable. The energy dissipation coefficient reaches 3.82 and 2.27 by using the finite element analysis and test, respectively. The energy dissipation coefficient is larger obtained by the finite element analysis and experiment.
3. PEC columns have a good anchoring effect on diagonal tension field of steel plate shear wall. The steel plate yield before the failure of PEC columns. The damage of the steel plate presents a remarkable \"stripe\" feature, and the concave-convex buckling is formed along the diagonal line where the stress is maximum.
4. The height-thickness ratio \(\lambda\) as the main parameter of the steel plate has a large effect on the ultimate strength and the hysteretic performance of steel plate shear wall with PEC columns. With the increase of height-thickness ratio, the hysteretic loop becomes full, the increase of ultimate bearing capacity is between 10% and 30%. The concrete strength as the main influential parameter on the axial compressive strength of PEC columns has little effect on the lateral resistance of the steel plate shear wall with PEC columns, and hysteretic behavior with the different grade concrete has little change. The axial compression ratio \(\mu\) has a great effect on the ultimate bearing capacity of the structure. The ultimate strength and energy dissipation capacity decrease with the increasing of axial compression ratio \(\mu\).  
The experimental results in this research reveal that crack type of damages exist in the steel plate shear walls with PEC columns. However, the current strain gauges cannot monitor such damages in real time. In future research, the authors will explore real-time crack damage detection in steel plate shear wall with PEC Columns by using the embeddable piezoceramic smart aggregate and surface-bonded piezoceramic patch transducers.  
[PERSON] designed the experiments. [PERSON] and [PERSON] performed the experiments. [PERSON] and [PERSON] analyzed the data and wrote the manuscript.  
This research is supported in part by National NSFC (Natural Science Foundation of China) (51368037, 51568040), the Fundamental Research Funds for the Gansu Universities, the Project of Green and Energy Conservation Architecture of Gansu province, Alumni Foundation of Civil Engineering 77, Lanzhou University of Technology.  
Authors appreciated Lanzhou University of Science and Technology for providing experimental sites and instruments.  
The authors declare no conflict of interest.