## 5 Discussions on the Completion State
### Further Optimization Analysis of the Completion State
The cable alignments at a free cable state, system transformation condition, and completion state were determined. In addition, the control parameters of cable erection were obtained, including the pre-displacements of anchoring points and pre-lifting amounts of the main saddles. The whole-process control of the cable system from the construction to the completion state was realized using the proposed algorithm. The multiple-control method for the whole process of system transformation and corresponding control principles were proposed. The hanger tensioning force, exposed amount of hanger anchor cup, and tag line position were chosen as the multi-control parameters, which were mutually checked during each hanger tensioning step. The tag line position was calculated based on the hanger tensioning forces of each step considering the elastic elongation of hanger. In addition, the system transformation method based on the passive tensioning of the side span was adopted. The active tension process was divided into four stages, including five tension rounds. The accuracies of the proposed multiple-control method was verified by comparing the measured tag line positon in each tensioning step with the target values, as well as the measured completion state. The tensioning error accumulations were avoided basically. In addition, the phenomenon of repeated installation of equipment, if checking the tag line positon after a hanger tensioning round, according to the traditional control method, was avoided. Moreover, the total time used for the system transformation of Hunan Road Bridge was 21 days, which reflects the efficiency of the proposed control method. This part of the research work provides important references for the system transformation control of the similar self-anchored suspension bridges. The concrete shrinkage and creep effects during construction and operation periods were considered to determine a reasonable completion state. According to the prediction results, the positions of cable anchor points at tower tops and girder ends will move toward the mid-span. Significant deflections of girder at the middle mid-span will be caused. The maximum measured girder-lifting amount at the middle section under the actual completion state was 0.013 m. The target hanger forces were further optimized based on the numerical simulations. A parametric study about the influence on the stress and geometry evolution of the girder brought by the final girder alignment after adjusting hanger forces was conducted. The results show that the long-term compressive stress evolution of the girder was optimized through the appropriate adjustment of hanger force. The optimized girder pre-lifting amount and hanger force were obtained to effectively offset the adverse influences brought by the long-term concrete shrinkage and creep, which are the lessons learned from this paper. Conceptualization, G.Z. and A.L. ; Data curation, G.Z. and Z.X. ; Formal analysis, G.Z. ; Funding acquisition, G.Z., A.L. and J.L. ; Investigation, G.Z. and M.D. ; Methodology, G.Z. and M.D. ; Project administration, G.Z. and Z.X. ; Software, G.Z. ; Supervision, A.L. ; Validation, G.Z. and M.D. ; Writing--original draft, G.Z. ; Writing--review & editing, L.Z. This research was funded by [National Natural Science Foundation of China] grant number [51278104], [Fundamental Research Funds for the Central Universities] grant number [30919011246], [Transportation Scientific Research Program of Jiangsu Province, China] grant number [2011Y03], [Research Fund for the Doctoral Program of Higher Education of China] grant number [20133304120015], [Universities Natural Science Foundation of Jiangsu Province, China] grant number [12 KJB560003]. And The APC was funded by [Fundamental Research Funds for the Central Universities grant number [30919011246] of Nanjing University of Science and Technology].