## 1 Introduction  
Currently, the girder material forms of self-anchored suspension bridges in China are diverse, including the concrete girder, steel girder, and steel-concrete composite girder. The concrete self-anchored suspension bridge is becoming more competitive among the city bridges of medium-span because of the economics of concrete and elegance appearance [1; 2]. More than 30 concrete self-anchoredsuspension bridges have been built in China. In addition, the girder width usually increases to 50 m or more to meet the increasing lane requirements. The concrete shrinkage and creep effects in the extra-wide girder and towers should be fully considered. Moreover, the reliability of the bridge is related to important social impacts [3; 4; 5]. The determination of a reasonable completion state and the corresponding control of implementation process are necessary for the structural safety and service durability.  
The accurate cable system analysis is the premise of completion state determination for the self-anchored suspension bridge. Some analytic programs of cable system have been proposed, including the BNLAS (SGKZZ000) program developed by [PERSON] [6] and the SSBAP2009 proposed by [PERSON] [7], which are characterized by small computing cost compared with the general finite element (FE) software [6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 16]. However, the influences brought by the concrete shrinkage and creep during construction and operation periods should be precisely considered by determining the appropriate pre-displacements of components. Moreover, the convenient and refined method is required to simulate the changes in the contact relationships between cable and saddles during system transformation. As for the construction of self-anchored suspension bridge, the tower and girder are first erected. The cables are anchored on the girder ends. Then, the completion state is achieved by conducting the system transformation. The schemes of system transformation have been widely investigated by relying on actual bridge structures [17; 18; 19; 20; 21]. [PERSON] [2] proposed the system transformation scheme of Yong Jong Bridge in Korea based on the reverse nonlinear FE analysis. However, there are few studies on the refined control methods of hanger tensioning, including the tensioning state control and judgment criteria, which are also the main factors affecting the accuracy and efficiency of system transformation. In short, the refined control of system transformation has become a serious issue to be solved along with the growing construction number of a self-anchored suspension bridge.  
In this paper, the ANSYS beam-type FE simulation, cable analytic program BNLAS (SGKZ2000), and filed monitoring data were integrated. The determination and implementation methods of a reasonable completion state for the Hunan Road Bridge were studied, which is currently the widest concrete self-anchored suspension bridge in China. The synthesis algorithm of reasonable completion state determination was proposed based on the prediction of concrete shrinkage and creep. The calculation principles of the CEB-FIP 90 model and age-adjusted effective modulus method were compiled into the FE simulations. Moreover, the multiple-control method for the whole process of system transformation was proposed. A detailed system transformation procedure was formulated and performed well in the construction site. In addition, the further optimization analysis of the completion state was conducted. The optimized target values of hanger forces and girder-lifting amount were obtained.