2012, Volume 14, Issue 7
Strategic Study of CAE >> 2012, Volume 14, Issue 7
Behaviors of super-long span prestressed cable-stayed bridge with CFRP cables and UHPC girder
1. School of Civil Engineering, Hunan University, Changsha 410082, China;
2. School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China
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Abstract
To discuss the applicability of carbon fiber reinforced polymer (CFRP) cables and reactive powder concrete (RPC)in super long span cable stayed bridges, taking a 1 008 m cable stayed bridge using steel girder and steel cables as example, a cable stayed bridge with the same span using RPC(reactive powder concrete) as the girder and advanced composite material CFRP (carbon fiber reinforced polymer) as the cable was designed, in which the cable cross section was determined by the principles of equivalent cable strength and the beam cross section was determined considering the stiffness, shear capacity and local stability. Based on the method of finite element analysis, the comparative study of these two structures on their static properties, dynamic properties, stability and wind resistance were carried out. The results show that it is feasible for using RPC as the girder and CFRP as the cable so as to form a highly efficient, durable cable stayed bridge of concrete structure and make its applicable span reach about 1 000 m long.
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