About the author:

1. CCCC Second Harbor Engineering Co., Ltd.,Wuhan, Hubei 430040,China;2. CCCCSHEC Fourth Engineering Co., Ltd.,Wuhu, Anhui 241060,China;3. Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies ofTransport Infrastructure,Wuhan, Hubei 430040,China; 4. Key Laboratory of Large⁃span Bridge ConstructionTechnology,Wuhan, Hubei 430040,China

Abstract:

The cable tower of Changtai Yangtze River Bridge adopts space four tower legs diamond shapedcomposite structure. The lower beam of the cable tower adopts the non layered pouring scheme, with alarge amount of pouring at one time. The construction process of the lower beam has complex spatialstress, large section and long span. The shape, internal force, calculation and analysis method, supportstructure form of the lower beam are related to the pouring sequence of the lower beam. In this paper, adual element finite element simulation method is proposed to simulate the whole process from the flowstate of the lower beam concrete to the formation of the stiffness of the concrete solidification. Thecalculation results of the structural internal force and the deformation of the lower beam are moreaccurate. The pouring sequence of the lower cross beam of four tower legs has little impact on thestructure. The use of separate support can effectively reduce the impact on the internal force of the towerleg structure during the pouring process of the lower cross beam, make the stress more clear, andeliminate the relative height difference of the closure of the lower cross beam.