ABSTRACT
Due to its various merits (e.g., elegant structural style, adaptability to different geologies and terrains), self-anchored suspension bridge is a competitive bridge style and has been widely applied in engineering practices In order to combine the specific material advantages of steel and concrete, the steel-concrete composite beam was introduced into the design of self-anchored suspension bridge. Along the cross section of the beam, it was mainly constituted by steel girder, while the deck is made of concrete. The construction process of “girder first and suspension cable second” was normally adopted in self-anchored suspension bridge construction since the main cable of it was usually directly anchored on the stiffening girder. The system transform was completed by tensioning suspenders to transform the stiffening girder, which may previously supported on a temporary support, into a multi-point elastic support system. For selfanchored suspension bridge with steel-concrete composite beam, its stress states in the process of system transform maybe very complex because the placement of bridge deck will influence the stiffness of the stiffening girder in the process of system transform. The complex stress state in the system transform causes significant nonlinearity of the system which needs to be considered in the construction control (Ochsendorf and Billington, 1999; Hu, 2008; Zhang et al., 2009; Zhou et al., 2006).
