Analyses Of Prestressed Concrete Cable-Stayed Bridge And Its Reinforcement Scheme

Firstly, this thesis introduces the characteristics and history of cable-stayed bridges as well as some famous concrete cable-stayed bridges at home and abroad. The universal problems of concrete cable-stayed bridges and the principles, methods and examples of reinforcing design are briefly introduced. Then, based on a double cable concrete cable-stayed bridge in twin towers with a span of (38.5+71+38.5)m, a beam element model is established by utilizing finite element software MIDAS/CIVIL to calculate and analyze the stress and deformation of the bridge in construction stages and operation stage. According to the calculation results and the field tests, a scheme of reinforcing design is put forward and a finite element model of the cable-stayed bridge after reinforcement is established by utilizing finite element software MIDAS/CIVIL. Then the stress and deformation of the reinforced bridge are calculated. At the same time, a combined element model of the cable-stayed bridge after reinforcement is established by utilizing finite element software ANS YS to calculate the stress of the structure. The effect of reinforcement is evaluated according to the results.