Study on steel box girder with partial precast concrete deck by top-down method

Zi-jing Wang

COMPUTER MODELLING & NEW TECHNOLOGIES 2014 18(12D) 34-38

Department of Engineering Management, Luoyang Institute of Science and Technology, No.90, Wangcheng Avenue, Luoyang, Henan, P.R. China

Top-down construction method is one popular used method in constructing steel box girder throughout the world. But the existing method is uneconomical due to using closed rectangular section and full in-situ casting concrete in the deck. An open-trapezoidal steel box-girder cross section and partial precast concrete deck is proposed here. To evaluate practicability of this method, finite element computer model has been set up for simulating the behaviour of the continuous steel box girder during construction, and then the elastic stresses of steel and concrete during construction stages were analyzed by considering the full-scale model of bridge.