Suspension Bridge Steel Box Girder Construction Monitoring Study

Aim at the character of construction control caiculation of suspension bridge, this paper put foiward a new calculative method. The method colligate numerical theory and limited displacement tlieoiy. At the same time, the paper research into contends means of construction control in stiffening girder suspending phase, including cables lineanW main saddle抯 driving, tensile force of cable strands and concrete stress of main towers. Especially, taking into account of concrete抯 shrinkage and creep, method to test and analysis concrete stress of main towers is studied. For the first time, string vibration method is used to test tensile force of cable strands. Test ways and precise is discussed also. Research that this paper introduced has been used in YiChang Changjiang River Highway Bridge construction control, now the constniction has finished almost. Practice show that the effect is well.