Closure technique for the hybrid girder cable stayed bridge of Edong Bridge

摘要

Based on Edong Yangtze River Bridge, the second longest hybrid girder cable-stayed bridgewith 926 m long main span, the influencing factors and crucial techniques of the main span closuremethod for long span hybrid girder cable-stayed bridge are studied. According to theoretical analysis,numerical evaluation and practical test, the loading assistant closure method with better thermaladaptability and less influence on bridge line and the forced status is employed in Edong YangtzeRiver Bridge in order to meet the requirements of the unstressed state control method. Based on thementioned advantages, the loading assistant closure method is applicable to long span hybrid girdercable-stayed bridges. The conclusion can provide a reference for the further design of the similarbridges.