Study On Structural Behavior Of Steel-concrete Composite Beam Bridge In Constructing Phase

Steel-concrete composite beam is adopted more and more in the urban road of our country. Comparing to other structure shape, this form exerts tension strength of steel and compression strength of concrete much more. And it has many advantages, such as: legerity, slinky, big span ability, celerity construct, good traffic when constructing and so on. However, negative bending moment nearby the middle supports of composite steel-concrete continuous beam bridge, will cause floor deck concrete to crack, affect the duration of structure and debase the life-span of the structure. The research proves the ameliorate of technical measure, we can bring to bear pre-stress in concreted floor deck to avoid cracks.This thesis aim at the design and constructing of aerodrome road composite steel-concrete continuous beam bridge, it analyses the constructing by using FEM software ANSYS. We place strain gauge in advance to inspect stress of this bridge in constructing phase. This paper cleans up the testing date and compares the results with calculation results. Then find out the effecting factors between testing results and calculation results. In addition to, this paper analyses the stress of composite steel-concrete continuous beam bridge with different parameters to gain the effect rule of different parameters, and proposes some treatments and suggestions for the design and the structure aspect.This paper put forward adjusting sequence of constructing concrete, the method of supports displacement, tauten the pre-stress tight wire is a effective measure for concrete bridge deck pre-stress by aiming at the design and constructing of aerodrome road composite steel-concrete continuous beam bridge. And educed more effective will gain by integrated adopt more technical measures. In addition to, this paper analyses the stress of composite steel-concrete continuous beam bridge with different parameters to gain the effect rule of different parameters, and proposes some treatments and suggestions for the design and the structure aspect.